diff --git a/Dockerfile b/Dockerfile
index 16d641ac7ce..a774e7e8943 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -66,10 +66,6 @@ RUN apt install -y ${CASEFLOW} &&  \
 # install jemalloc
 RUN apt install -y --no-install-recommends libjemalloc-dev
 
-
-# install datadog agent
-RUN DD_INSTALL_ONLY=true DD_AGENT_MAJOR_VERSION=7 DD_API_KEY=$(cat config/datadog.key) bash -c "$(curl -L https://raw.githubusercontent.com/DataDog/datadog-agent/master/cmd/agent/install_script.sh)"
-
 RUN rm -rf /var/lib/apt/lists/*
 
 # Installing the version of bundler that corresponds to the Gemfile.lock
diff --git a/Gemfile b/Gemfile
index 17eec027d43..351f2d03457 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,8 +22,6 @@ gem "connect_mpi", git: "https://github.com/department-of-veterans-affairs/conne
 gem "connect_vbms", git: "https://github.com/department-of-veterans-affairs/connect_vbms.git", ref: "9807d9c9f0f3e3494a60b6693dc4f455c1e3e922"
 gem "console_tree_renderer", git: "https://github.com/department-of-veterans-affairs/console-tree-renderer.git", tag: "v0.1.1"
 gem "countries"
-gem "ddtrace"
-gem "dogstatsd-ruby"
 gem "dry-schema", "~> 1.4"
 gem "fast_jsonapi"
 gem "fuzzy_match"
@@ -36,8 +34,28 @@ gem "moment_timezone-rails"
 # Rails 6 has native support for multiple dbs, so prefer that over multiverse after upgrade.
 # https://github.com/ankane/multiverse#upgrading-to-rails-6
 gem "multiverse"
-gem "newrelic_rpm"
 gem "nokogiri", ">= 1.11.0.rc4"
+
+gem "opentelemetry-exporter-otlp", require: false
+gem "opentelemetry-sdk", require: false
+
+gem "opentelemetry-instrumentation-action_pack", require: false
+gem "opentelemetry-instrumentation-action_view", require: false
+gem "opentelemetry-instrumentation-active_job", require: false
+gem "opentelemetry-instrumentation-active_model_serializers", require: false
+gem "opentelemetry-instrumentation-active_record", require: false
+gem "opentelemetry-instrumentation-aws_sdk", require: false
+gem "opentelemetry-instrumentation-concurrent_ruby", require: false
+gem "opentelemetry-instrumentation-faraday", require: false
+gem "opentelemetry-instrumentation-http", require: false
+gem "opentelemetry-instrumentation-http_client", require: false
+gem "opentelemetry-instrumentation-net_http", require: false
+gem "opentelemetry-instrumentation-pg", require: false
+gem "opentelemetry-instrumentation-rack", require: false
+gem "opentelemetry-instrumentation-rails", require: false
+gem "opentelemetry-instrumentation-rake", require: false
+gem "opentelemetry-instrumentation-redis", require: false
+
 gem "paper_trail", "~> 12.0"
 # Used to speed up reporting
 gem "parallel"
@@ -62,7 +80,7 @@ gem "rainbow"
 # React
 gem "react_on_rails", "11.3.0"
 gem "redis-mutex"
-gem "redis-namespace"
+gem "redis-namespace", "~> 1.11.0"
 gem "redis-rails", "~> 5.0.2"
 gem "request_store"
 gem "roo", "~> 2.7"
@@ -122,7 +140,8 @@ group :test, :development, :demo do
   gem "rubocop-performance"
   gem "rubocop-rails"
   gem "scss_lint", require: false
-  gem "simplecov", git: "https://github.com/colszowka/simplecov.git", require: false
+  gem "simplecov", require: false
+  gem "simplecov-lcov", require: false
   gem "single_cov"
   gem "sniffybara", git: "https://github.com/department-of-veterans-affairs/sniffybara.git"
   gem "sql_tracker"
diff --git a/Gemfile.lock b/Gemfile.lock
index 2239aa22953..9930164e7b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,12 +1,3 @@
-GIT
-  remote: https://github.com/colszowka/simplecov.git
-  revision: 783c9d7e9995f3ea9baf9fbb517c1d0ceb12acdb
-  specs:
-    simplecov (0.15.1)
-      docile (~> 1.1.0)
-      json (>= 1.8, < 3)
-      simplecov-html (~> 0.10.0)
-
 GIT
   remote: https://github.com/department-of-veterans-affairs/caseflow-commons
   revision: 716b58caf2116da5fca21c3b3aeea6c9712f3b9d
@@ -1529,8 +1520,6 @@ GEM
       database_cleaner-core (~> 2.0.0)
     database_cleaner-core (2.0.1)
     date (3.3.3)
-    ddtrace (0.34.1)
-      msgpack
     debase (0.2.4.1)
       debase-ruby_core_source (>= 0.10.2)
     debase-ruby_core_source (0.10.14)
@@ -1543,8 +1532,7 @@ GEM
       rake (> 10, < 13)
       thor (~> 0.19)
     diff-lcs (1.3)
-    docile (1.1.5)
-    dogstatsd-ruby (4.4.0)
+    docile (1.4.0)
     dotenv (2.7.5)
     dotenv-rails (2.7.5)
       dotenv (= 2.7.5)
@@ -1615,6 +1603,9 @@ GEM
       rchardet (~> 1.8)
     globalid (1.1.0)
       activesupport (>= 5.0)
+    google-protobuf (3.25.4)
+    googleapis-common-protos-types (1.15.0)
+      google-protobuf (>= 3.18, < 5.a)
     govdelivery-tms (2.8.4)
       activesupport
       faraday
@@ -1658,7 +1649,6 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    json (2.3.0)
     json-schema (4.3.0)
       addressable (>= 2.8)
     json_schemer (0.2.16)
@@ -1737,7 +1727,6 @@ GEM
       timeout
     net-smtp (0.3.3)
       net-protocol
-    newrelic_rpm (6.5.0.357)
     nio4r (2.5.9)
     no_proxy_fix (0.1.2)
     nokogiri (1.15.5)
@@ -1751,6 +1740,92 @@ GEM
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     open4 (1.3.4)
+    opentelemetry-api (1.1.0)
+    opentelemetry-common (0.19.7)
+      opentelemetry-api (~> 1.0)
+    opentelemetry-exporter-otlp (0.24.2)
+      google-protobuf (~> 3.19)
+      googleapis-common-protos-types (~> 1.3)
+      opentelemetry-api (~> 1.1)
+      opentelemetry-common (~> 0.19.6)
+      opentelemetry-sdk (~> 1.2)
+      opentelemetry-semantic_conventions
+    opentelemetry-instrumentation-action_pack (0.5.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+      opentelemetry-instrumentation-rack (~> 0.21)
+    opentelemetry-instrumentation-action_view (0.4.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-active_support (~> 0.1)
+      opentelemetry-instrumentation-base (~> 0.20)
+    opentelemetry-instrumentation-active_job (0.4.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-active_model_serializers (0.19.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-active_record (0.5.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+      ruby2_keywords
+    opentelemetry-instrumentation-active_support (0.3.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-aws_sdk (0.3.2)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-base (0.21.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-registry (~> 0.1)
+    opentelemetry-instrumentation-concurrent_ruby (0.20.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-faraday (0.22.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-http (0.21.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-http_client (0.21.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-net_http (0.21.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-pg (0.23.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-rack (0.22.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-rails (0.25.0)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-action_pack (~> 0.5.0)
+      opentelemetry-instrumentation-action_view (~> 0.4.0)
+      opentelemetry-instrumentation-active_job (~> 0.4.0)
+      opentelemetry-instrumentation-active_record (~> 0.5.0)
+      opentelemetry-instrumentation-active_support (~> 0.3.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-rake (0.1.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-instrumentation-redis (0.24.1)
+      opentelemetry-api (~> 1.0)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-instrumentation-base (~> 0.21.0)
+    opentelemetry-registry (0.2.0)
+      opentelemetry-api (~> 1.1)
+    opentelemetry-sdk (1.2.1)
+      opentelemetry-api (~> 1.1)
+      opentelemetry-common (~> 0.19.3)
+      opentelemetry-registry (~> 0.2)
+      opentelemetry-semantic_conventions
+    opentelemetry-semantic_conventions (1.10.0)
+      opentelemetry-api (~> 1.0)
     paper_trail (12.3.0)
       activerecord (>= 5.2)
       request_store (~> 1.1)
@@ -1840,8 +1915,8 @@ GEM
       redis-namespace (~> 1.0)
     redis-mutex (4.0.2)
       redis-classy (~> 2.0)
-    redis-namespace (1.6.0)
-      redis (>= 3.0.4)
+    redis-namespace (1.11.0)
+      redis (>= 4)
     redis-rack (2.0.4)
       rack (>= 1.5, < 3)
       redis-store (>= 1.2, < 2)
@@ -1918,6 +1993,7 @@ GEM
     ruby-plsql (0.8.0)
     ruby-prof (1.4.1)
     ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
     ruby_dep (1.5.0)
     ruby_parser (3.20.3)
       sexp_processor (~> 4.16)
@@ -1962,7 +2038,13 @@ GEM
       thor
     shoulda-matchers (5.3.0)
       activesupport (>= 5.2.0)
-    simplecov-html (0.10.2)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov-lcov (0.8.0)
+    simplecov_json_formatter (0.1.4)
     single_cov (1.3.2)
     sixarm_ruby_unaccent (1.2.0)
     socksify (1.7.1)
@@ -2070,10 +2152,8 @@ DEPENDENCIES
   countries
   danger (~> 6.2.2)
   database_cleaner-active_record (= 2.0.0)
-  ddtrace
   debase
   derailed_benchmarks
-  dogstatsd-ruby
   dotenv-rails
   dry-schema (~> 1.4)
   factory_bot_rails (~> 5.2)
@@ -2094,8 +2174,25 @@ DEPENDENCIES
   meta_request
   moment_timezone-rails
   multiverse
-  newrelic_rpm
   nokogiri (>= 1.11.0.rc4)
+  opentelemetry-exporter-otlp
+  opentelemetry-instrumentation-action_pack
+  opentelemetry-instrumentation-action_view
+  opentelemetry-instrumentation-active_job
+  opentelemetry-instrumentation-active_model_serializers
+  opentelemetry-instrumentation-active_record
+  opentelemetry-instrumentation-aws_sdk
+  opentelemetry-instrumentation-concurrent_ruby
+  opentelemetry-instrumentation-faraday
+  opentelemetry-instrumentation-http
+  opentelemetry-instrumentation-http_client
+  opentelemetry-instrumentation-net_http
+  opentelemetry-instrumentation-pg
+  opentelemetry-instrumentation-rack
+  opentelemetry-instrumentation-rails
+  opentelemetry-instrumentation-rake
+  opentelemetry-instrumentation-redis
+  opentelemetry-sdk
   paper_trail (~> 12.0)
   parallel
   paranoia (~> 2.2)
@@ -2114,7 +2211,7 @@ DEPENDENCIES
   rb-readline
   react_on_rails (= 11.3.0)
   redis-mutex
-  redis-namespace
+  redis-namespace (~> 1.11.0)
   redis-rails (~> 5.0.2)
   request_store
   roo (~> 2.7)
@@ -2138,7 +2235,8 @@ DEPENDENCIES
   sentry-raven
   shoryuken (= 3.1.11)
   shoulda-matchers
-  simplecov!
+  simplecov
+  simplecov-lcov
   single_cov
   sniffybara!
   solargraph
diff --git a/README.md b/README.md
index a9f82e9f92d..281703aa1e2 100644
--- a/README.md
+++ b/README.md
@@ -137,13 +137,6 @@ See debugging steps as well as more information about FACOLS in our [wiki](https
 Review the [FACOLS documentation](docs/FACOLS.md) for details.
 
 ## Monitoring  #######################################################
-We use NewRelic to monitor the app. By default, it's disabled locally. To enable it, do:
-
-```
-NEW_RELIC_LICENSE_KEY='<key as displayed on NewRelic.com>' NEW_RELIC_AGENT_ENABLED=true bundle exec foreman start
-```
-
-You may wish to do this if you are debugging our NewRelic integration, for instance.
 
 ---
 
diff --git a/app/controllers/api/application_controller.rb b/app/controllers/api/application_controller.rb
index ea12981e0fc..9d189fa5a82 100644
--- a/app/controllers/api/application_controller.rb
+++ b/app/controllers/api/application_controller.rb
@@ -3,8 +3,6 @@
 class Api::ApplicationController < ActionController::Base
   protect_from_forgery with: :null_session
 
-  include TrackRequestId
-
   force_ssl if: :ssl_enabled?
   before_action :strict_transport_security
 
diff --git a/app/controllers/application_base_controller.rb b/app/controllers/application_base_controller.rb
index 41f55a7fe3b..bfdba59f926 100644
--- a/app/controllers/application_base_controller.rb
+++ b/app/controllers/application_base_controller.rb
@@ -6,8 +6,6 @@ class ApplicationBaseController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
 
-  include TrackRequestId
-
   force_ssl if: :ssl_enabled?
   before_action :check_out_of_service
   before_action :strict_transport_security
diff --git a/app/controllers/concerns/track_request_id.rb b/app/controllers/concerns/track_request_id.rb
deleted file mode 100644
index 188256c88f0..00000000000
--- a/app/controllers/concerns/track_request_id.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-module TrackRequestId
-  extend ActiveSupport::Concern
-
-  included do
-    before_action :track_request_id
-  end
-
-  def track_request_id
-    ::NewRelic::Agent.add_custom_attributes(request_id: request.uuid)
-  end
-end
diff --git a/app/controllers/dependencies_checks_controller.rb b/app/controllers/dependencies_checks_controller.rb
index ee42e93b5c8..a39f57a4be0 100644
--- a/app/controllers/dependencies_checks_controller.rb
+++ b/app/controllers/dependencies_checks_controller.rb
@@ -1,8 +1,6 @@
 # frozen_string_literal: true
 
 class DependenciesChecksController < ApplicationBaseController
-  newrelic_ignore_apdex
-
   skip_before_action :check_out_of_service
 
   def show
diff --git a/app/controllers/health_checks_controller.rb b/app/controllers/health_checks_controller.rb
index 4ee3acc4440..4451296b081 100644
--- a/app/controllers/health_checks_controller.rb
+++ b/app/controllers/health_checks_controller.rb
@@ -2,11 +2,9 @@
 
 # rubocop:disable Rails/ApplicationController
 class HealthChecksController < ActionController::Base
-  include TrackRequestId
   include CollectCustomMetrics
 
   protect_from_forgery with: :exception
-  newrelic_ignore_apdex
 
   def show
     body = {
diff --git a/app/jobs/caseflow_job.rb b/app/jobs/caseflow_job.rb
index b9717f403b0..c03e375a05c 100644
--- a/app/jobs/caseflow_job.rb
+++ b/app/jobs/caseflow_job.rb
@@ -7,7 +7,6 @@ class CaseflowJob < ApplicationJob
     job.start_time = Time.zone.now
   end
 
-  # Automatically report runtime to DataDog if job does not explicitly report to DataDog.
   # Note: This block is not called if an error occurs when `perform` is executed --
   # see https://stackoverflow.com/questions/50263787/does-active-job-call-after-perform-when-perform-raises-an-error
   after_perform do |job|
diff --git a/app/jobs/update_cached_appeals_attributes_job.rb b/app/jobs/update_cached_appeals_attributes_job.rb
index 3bf31ad2eff..ad78ee9e564 100644
--- a/app/jobs/update_cached_appeals_attributes_job.rb
+++ b/app/jobs/update_cached_appeals_attributes_job.rb
@@ -124,9 +124,6 @@ def log_error(start_time, err)
     # We do not log every job failure since we expect the job to occasionally fail when we lose
     # database connections. Since this job runs regularly, we will continue to cache appeals and we
     # have set up alerts to notify us if we have cached too few appeals over the past day:
-    # * (Too little Postgres data cached) https://app.datadoghq.com/monitors/41421962
-    # * (Too little VACOLS data cached) https://app.datadoghq.com/monitors/41234223
-    # * (Job has not succeeded in the past day) https://app.datadoghq.com/monitors/41423568
     record_error_in_metrics_service
 
     metrics_service_report_runtime(metric_group_name: METRIC_GROUP_NAME)
diff --git a/app/jobs/virtual_hearings/create_conference_job.rb b/app/jobs/virtual_hearings/create_conference_job.rb
index e88973d77c0..0c390164315 100644
--- a/app/jobs/virtual_hearings/create_conference_job.rb
+++ b/app/jobs/virtual_hearings/create_conference_job.rb
@@ -123,7 +123,7 @@ def log_virtual_hearing_state(virtual_hearing)
     Rails.logger.info("Establishment Updated At: (#{virtual_hearing.establishment.updated_at})")
   end
 
-  def create_conference_datadog_tags
+  def create_conference_tags
     custom_metric_info.merge(attrs: { hearing_id: virtual_hearing.hearing_id })
   end
 
@@ -149,12 +149,12 @@ def create_conference
 
         virtual_hearing.establishment.update_error!(error_display)
 
-        MetricsService.increment_counter(metric_name: "created_conference.failed", **create_conference_datadog_tags)
+        MetricsService.increment_counter(metric_name: "created_conference.failed", **create_conference_tags)
 
         fail pexip_response.error
       end
 
-      MetricsService.increment_counter(metric_name: "created_conference.successful", **create_conference_datadog_tags)
+      MetricsService.increment_counter(metric_name: "created_conference.successful", **create_conference_tags)
 
       virtual_hearing.update(conference_id: pexip_response.data[:conference_id])
     end
diff --git a/app/jobs/virtual_hearings/delete_conferences_job.rb b/app/jobs/virtual_hearings/delete_conferences_job.rb
index fcc77df526f..9f713c64cf5 100644
--- a/app/jobs/virtual_hearings/delete_conferences_job.rb
+++ b/app/jobs/virtual_hearings/delete_conferences_job.rb
@@ -117,13 +117,13 @@ def count_deleted_and_log(enumerable)
 
     if removed > 0
       MetricsService.increment_counter(
-        metric_name: "deleted_conferences.successful", by: removed, ** custom_metric_info
+        metric_name: "deleted_conferences.successful", ** custom_metric_info
       )
     end
 
     if failed > 0
       MetricsService.increment_counter(
-        metric_name: "deleted_conferences.failed", by: failed, ** custom_metric_info
+        metric_name: "deleted_conferences.failed", ** custom_metric_info
       )
     end
   end
diff --git a/app/models/metric.rb b/app/models/metric.rb
index 3e3f515bfa2..ecdf62164b4 100644
--- a/app/models/metric.rb
+++ b/app/models/metric.rb
@@ -7,7 +7,6 @@ class Metric < CaseflowRecord
   METRIC_TYPES = { error: "error", log: "log", performance: "performance", info: "info" }.freeze
   LOG_SYSTEMS = {
     dynatrace: "dynatrace",
-    datadog: "datadog",
     rails_console: "rails_console",
     javascript_console: "javascript_console"
   }.freeze
diff --git a/app/services/collectors/stats_collector.rb b/app/services/collectors/stats_collector.rb
index 5eebb3a2ad5..f3148196c5c 100644
--- a/app/services/collectors/stats_collector.rb
+++ b/app/services/collectors/stats_collector.rb
@@ -11,7 +11,7 @@ def flatten_stats(metric_name_prefix, stats_hash)
       stats_hash.each do |metric_name, counts_hash|
         unless valid_metric_name?(metric_name)
           fail "Invalid metric name #{metric_name}; "\
-            "see https://docs.datadoghq.com/developers/metrics/#naming-custom-metrics"
+            "see https://docs.dynatrace.com/docs/extend-dynatrace/extend-metrics/reference/custom-metric-metadata"
         end
 
         stats.concat add_tags_to_group_counts(metric_name_prefix, metric_name, counts_hash)
@@ -29,7 +29,7 @@ def add_tags_to_group_counts(prefix, metric_name, group_counts)
     end
   end
 
-  # See valid tag name rules at https://docs.datadoghq.com/tagging/#defining-tags
+  # See valid tag name rules at https://docs.dynatrace.com/docs/manage/tags-and-metadata/setup/how-to-define-tags
   def to_valid_tag(name)
     name.gsub(/[^a-zA-Z_\-\:\.\d\/]/, "__")
   end
@@ -41,7 +41,7 @@ def to_valid_tag_key(name)
   end
 
   def valid_metric_name?(metric_name)
-    # Actual limit is 200 but since the actual metric name in DataDog has
+    # Actual limit is 200 but since the actual metric name has
     # "dsva_appeals.stats_collector_job." prepended, let's just stick with a 150 character limit.
     return false if metric_name.length > 150
 
diff --git a/app/services/geomatch_service.rb b/app/services/geomatch_service.rb
index 0d3e53a13e4..6d8645a5e1a 100644
--- a/app/services/geomatch_service.rb
+++ b/app/services/geomatch_service.rb
@@ -73,7 +73,6 @@ def record_geomatched_appeal(status)
       metric_name: "geomatched_appeals",
       attrs: {
         status: status,
-        appeal_external_id: appeal.external_id,
         hearing_request_type: appeal.current_hearing_request_type
       }
     )
diff --git a/app/services/hearings/reminder_service.rb b/app/services/hearings/reminder_service.rb
index 936f60aff4c..4076b053f65 100644
--- a/app/services/hearings/reminder_service.rb
+++ b/app/services/hearings/reminder_service.rb
@@ -51,7 +51,6 @@ def send_to_metrics_service(type)
       metric_name: "emails.would_be_sent",
       attrs: {
         reminder_type: type,
-        hearing_id: hearing.id,
         request_type: hearing.hearing_request_type,
         hearing_type: hearing.class.name
       }
diff --git a/app/services/metrics_service.rb b/app/services/metrics_service.rb
index 08c2dbb68c4..82fff42f6d9 100644
--- a/app/services/metrics_service.rb
+++ b/app/services/metrics_service.rb
@@ -1,18 +1,14 @@
 # frozen_string_literal: true
 
 require "benchmark"
-require "datadog/statsd"
 require "statsd-instrument"
 
 # see https://dropwizard.github.io/metrics/3.1.0/getting-started/ for abstractions on metric types
 class MetricsService
-  @statsd = Datadog::Statsd.new
-
   # :reek:LongParameterList
-  def self.increment_counter(metric_group:, metric_name:, app_name:, attrs: {}, by: 1)
+  def self.increment_counter(metric_group:, metric_name:, app_name:, attrs: {})
     tags = get_tags(app_name, attrs)
     stat_name = get_stat_name(metric_group, metric_name)
-    @statsd.increment(stat_name, tags: tags, by: by)
 
     # Dynatrace statD implementation
     StatsD.increment(stat_name, tags: tags)
@@ -34,7 +30,6 @@ def self.record_runtime(metric_group:, app_name:, start_time: Time.zone.now)
   def self.emit_gauge(metric_group:, metric_name:, metric_value:, app_name:, attrs: {})
     tags = get_tags(app_name, attrs)
     stat_name = get_stat_name(metric_group, metric_name)
-    @statsd.gauge(stat_name, metric_value, tags: tags)
 
     # Dynatrace statD implementation
     StatsD.gauge(stat_name, metric_value, tags: tags)
@@ -45,7 +40,6 @@ def self.emit_gauge(metric_group:, metric_name:, metric_value:, app_name:, attrs
   def self.histogram(metric_group:, metric_name:, metric_value:, app_name:, attrs: {})
     tags = get_tags(app_name, attrs)
     stat_name = get_stat_name(metric_group, metric_name)
-    @statsd.histogram(stat_name, metric_value, tags: tags)
 
     # Dynatrace statD implementation
     StatsD.histogram(stat_name, metric_value, tags: tags)
@@ -98,7 +92,6 @@ def self.record(description, service: nil, name: "unknown", caller: nil)
       }
       MetricsService.emit_gauge(sent_to_info)
 
-      sent_to << Metric::LOG_SYSTEMS[:datadog]
       sent_to << Metric::LOG_SYSTEMS[:dynatrace]
     end
 
diff --git a/app/views/layouts/_head.html.erb b/app/views/layouts/_head.html.erb
index d502c1fb968..279790378b6 100644
--- a/app/views/layouts/_head.html.erb
+++ b/app/views/layouts/_head.html.erb
@@ -12,7 +12,6 @@
   </title>
 
   <script>
-    <%= render "layouts/head_new_relic" %>
     <%= render "layouts/head_google_analytics" %>
   </script>
   <%= render "layouts/head_sentry" %>
diff --git a/app/views/layouts/_head_new_relic.html.erb b/app/views/layouts/_head_new_relic.html.erb
deleted file mode 100644
index 067774b1547..00000000000
--- a/app/views/layouts/_head_new_relic.html.erb
+++ /dev/null
@@ -1,13 +0,0 @@
-<!-- new relic script partial -->
-    // To avoid sending PII to New Relic, we will disable its error logging functionality.
-    // In anecdotal testing, the error logging functionality didn't even seem to work
-    // particularly well.
-    //
-    // We wrap this in a conditional because newrelic will not be defined when browser
-    // monitoring is not enabled. This will occur in local development when the
-    // NEW_RELIC_AGENT_ENABLED env var is not set, for instance.
-    if (window.newrelic) {
-      window.newrelic.setErrorHandler(function() {
-        return true;
-      });
-    }
diff --git a/config/initializers/datadog.rb b/config/initializers/datadog.rb
deleted file mode 100644
index 033ae4f776f..00000000000
--- a/config/initializers/datadog.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-unless Rails.env.test?
-  Datadog.configure do |c|
-    options = { analytics_enabled: true }
-
-    c.analytics_enabled = true
-    c.use :rails, options
-    c.use :active_record, options
-    c.use :rack, options
-    c.use :redis, options
-    c.use :shoryuken, options
-
-    c.env = ENV['DEPLOY_ENV']
-  end
-end
diff --git a/config/initializers/open_telemetry.rb b/config/initializers/open_telemetry.rb
new file mode 100644
index 00000000000..1eaf079c9e9
--- /dev/null
+++ b/config/initializers/open_telemetry.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+require 'rubygems'
+require 'bundler/setup'
+
+require 'opentelemetry/sdk'
+require 'opentelemetry/exporter/otlp'
+
+require "opentelemetry-instrumentation-action_pack"
+require "opentelemetry-instrumentation-action_view"
+require "opentelemetry-instrumentation-active_job"
+require "opentelemetry-instrumentation-active_record"
+require "opentelemetry-instrumentation-active_support"
+require "opentelemetry-instrumentation-aws_sdk"
+require "opentelemetry-instrumentation-concurrent_ruby"
+require "opentelemetry-instrumentation-faraday"
+require "opentelemetry-instrumentation-http_client"
+require "opentelemetry-instrumentation-net_http"
+require "opentelemetry-instrumentation-pg"
+require "opentelemetry-instrumentation-rack"
+require "opentelemetry-instrumentation-rails"
+require "opentelemetry-instrumentation-rake"
+require "opentelemetry-instrumentation-redis"
+
+# rubocop:disable Layout/LineLength
+
+DT_API_URL = ENV["DT_API_URL"]
+DT_API_TOKEN = ENV["DT_API_TOKEN"]
+
+Rails.logger.info("DT_API_TOKEN is set to #{DT_API_TOKEN}")
+
+if !Rails.env.development? && !Rails.env.test? && !Rails.env.demo?
+  OpenTelemetry::SDK.configure do |c|
+    c.service_name = 'caseflow'
+    c.service_version = '1.0.1'
+
+    c.use 'OpenTelemetry::Instrumentation::ActiveRecord'
+    c.use 'OpenTelemetry::Instrumentation::Rack', { untraced_endpoints: ['/health-check', '/sample', '/logs'] }
+    c.use 'OpenTelemetry::Instrumentation::Rails'
+
+    # c.use 'OpenTelemetry::Instrumentation::PG'
+    # c.use 'OpenTelemetry::Instrumentation::ActionView'
+    # c.use 'OpenTelemetry::Instrumentation::Redis'
+
+    c.use 'OpenTelemetry::Instrumentation::ActionPack'
+    c.use 'OpenTelemetry::Instrumentation::ActiveSupport'
+    c.use 'OpenTelemetry::Instrumentation::ActiveJob'
+    c.use 'OpenTelemetry::Instrumentation::AwsSdk', { suppress_internal_instrumentation: true }
+    c.use 'OpenTelemetry::Instrumentation::ConcurrentRuby'
+    c.use 'OpenTelemetry::Instrumentation::Faraday'
+    c.use 'OpenTelemetry::Instrumentation::HttpClient'
+    c.use 'OpenTelemetry::Instrumentation::Net::HTTP'
+
+    Rails.logger.info("Loaded instruments")
+
+    %w[dt_metadata_e617c525669e072eebe3d0f08212e8f2.properties /var/lib/dynatrace/enrichment/dt_host_metadata.properties].each { |name|
+      begin
+        c.resource = OpenTelemetry::SDK::Resources::Resource.create(Hash[*File.read(name.start_with?("/var") ? name : File.read(name)).split(/[=\n]+/)])
+      rescue
+      end
+    }
+    c.add_span_processor(
+      OpenTelemetry::SDK::Trace::Export::BatchSpanProcessor.new(
+        OpenTelemetry::Exporter::OTLP::Exporter.new(
+          endpoint: DT_API_URL + "/v1/traces",
+          headers: {
+            "Authorization": "Api-Token " + DT_API_TOKEN
+          }
+        )
+      )
+    )
+  end
+end
+  # rubocop:enable Layout/LineLength
diff --git a/config/initializers/rack_context.rb b/config/initializers/rack_context.rb
new file mode 100644
index 00000000000..974951fd6ed
--- /dev/null
+++ b/config/initializers/rack_context.rb
@@ -0,0 +1,24 @@
+class RackContextGetter < OpenTelemetry::Context::Propagation::RackEnvGetter
+
+  # :reek:FeatureEnvy
+  def get(carrier, key)
+    carrier[to_rack_key(key)] || carrier[key]
+  end
+
+  protected
+
+  def to_rack_key(key)
+    ret = +"HTTP_#{key}"
+    ret.tr!('-', '_')
+    ret.upcase!
+    ret
+  end
+end
+
+RACK_ENV_GETTER = RackContextGetter.new
+
+OpenTelemetry::Common::Propagation.instance_eval do
+  def rack_env_getter
+    RACK_ENV_GETTER
+  end
+end
diff --git a/config/initializers/vacols_request_spy.rb b/config/initializers/vacols_request_spy.rb
index 939f77dac4b..d79b92df7d6 100644
--- a/config/initializers/vacols_request_spy.rb
+++ b/config/initializers/vacols_request_spy.rb
@@ -32,8 +32,6 @@ def simulate_vacols_latency
     # $> REACT_ON_RAILS_ENV=HOT SIMULATE_VACOLS_LATENCY=true bundle exec rails s -p 3000
     return unless ENV["SIMULATE_VACOLS_LATENCY"]
 
-    # Default determined from metrics sent to Datadog:
-    # https://app.datadoghq.com/dashboard/54w-efy-r5d/va-systems?fullscreen_widget=399796003
     latency = ENV["VACOLS_DELAY_MS"] || 80
     sleep(latency / 1000.0)
   end
diff --git a/docker-bin/build.sh b/docker-bin/build.sh
index 797ebaff5ab..435d00482d5 100755
--- a/docker-bin/build.sh
+++ b/docker-bin/build.sh
@@ -41,8 +41,6 @@ fi
 cd ../../
 printf "commit: `git rev-parse HEAD`\ndate: `git log -1 --format=%cd`" > config/build_version.yml
 
-credstash -t appeals-credstash get datadog.api.key > config/datadog.key
-
 cp /etc/ssl/certs/ca-certificates.crt docker-bin/ca-certs/cacert.pem
 
 # Build Docker
@@ -50,7 +48,6 @@ echo -e "\tCreating Caseflow App Docker Image"
 docker build -t caseflow .
 result=$?
 echo -e "\tCleaning Up..."
-rm -rf config/datadog.key
 rm -rf docker-bin/oracle_libs
 if [ $result == 0 ]; then
   echo -e "\tBuilding Caseflow Docker App: Completed"
diff --git a/docker-bin/startup.sh b/docker-bin/startup.sh
index 97a73eeae4e..5a62bfce5c5 100644
--- a/docker-bin/startup.sh
+++ b/docker-bin/startup.sh
@@ -8,12 +8,6 @@ source $THIS_SCRIPT_DIR/env.sh
 echo "Start DBus"
 dbus-daemon --system
 
-echo "Start Datadog"
-nohup /opt/datadog-agent/bin/agent/agent run -p /opt/datadog-agent/run/agent.pid > dd-agent.out &
-nohup /opt/datadog-agent/embedded/bin/trace-agent --config /etc/datadog-agent/datadog.yaml --pid /opt/datadog-agent/run/trace-agent.pid > dd-trace.out &
-nohup /opt/datadog-agent/embedded/bin/system-probe --config=/etc/datadog-agent/system-probe.yaml --pid=/opt/datadog-agent/run/system-probe.pid > dd-probe.out &
-nohup /opt/datadog-agent/embedded/bin/process-agent --config=/etc/datadog-agent/datadog.yaml --sysprobe-config=/etc/datadog-agent/system-probe.yaml --pid=/opt/datadog-agent/run/process-agent.pid > dd-system-probe.out &
-
 echo "Waiting for dependencies to properly start up - 240 seconds"
 date
 sleep 240
diff --git a/newrelic.yml b/newrelic.yml
deleted file mode 100644
index c074e6089ed..00000000000
--- a/newrelic.yml
+++ /dev/null
@@ -1,49 +0,0 @@
-#
-# Generated November 03, 2017
-#
-# For full documentation of agent configuration options, please refer to
-# https://docs.newrelic.com/docs/agents/ruby-agent/installation-configuration/ruby-agent-configuration
-common: &default_settings
-  app_name: Caseflow
-
-  # Logging level for log/newrelic_agent.log
-  log_level: info
-
-  # Exception messages may have PII, so we won't send them.
-  # If we are sure that certain exceptions will not have PII, then we can whitelist them in this config file.
-  strip_exception_messages.enabled: true
-
-  # To avoid sending PII, we explicitly deny all headers and parameters. We then whitelist known safe attributes.
-  attributes.exclude: [response.headers.*, request.headers.*, request.parameters.*]
-  attributes.include: [
-    response.headers.contentType,
-    response.headers.contentLength,
-    request.headers.userAgent,
-    request.headers.accept,
-    request.headers.host,
-    request.headers.contentType,
-  ]
-
-# Environment-specific settings are in this section.
-# RAILS_ENV or RACK_ENV (as appropriate) is used to determine the environment.
-# If your application has other named environments, configure them here.
-development:
-  <<: *default_settings
-  app_name: Caseflow (Local Dev)
-  agent_enabled: false
-
-demo:
-  <<: *default_settings
-  app_name: Caseflow (Demo)
-
-test:
-  <<: *default_settings
-  # It doesn't make sense to report to New Relic from automated test runs.
-  monitor_mode: false
-
-staging:
-  <<: *default_settings
-  app_name: Caseflow (Staging)
-
-production:
-  <<: *default_settings
diff --git a/spec/jobs/virtual_hearings/delete_conferences_job_spec.rb b/spec/jobs/virtual_hearings/delete_conferences_job_spec.rb
index 527fda1e772..55bf82f74b1 100644
--- a/spec/jobs/virtual_hearings/delete_conferences_job_spec.rb
+++ b/spec/jobs/virtual_hearings/delete_conferences_job_spec.rb
@@ -188,8 +188,7 @@
         expect(MetricsService).to receive(:increment_counter).with(
           hash_including(
             metric_name: "deleted_conferences.successful",
-            metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-            by: 2
+            metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
           )
         )
         subject
@@ -213,8 +212,7 @@
           expect(MetricsService).to receive(:increment_counter).with(
             hash_including(
               metric_name: "deleted_conferences.failed",
-              metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-              by: 2
+              metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
             )
           )
           subject
@@ -241,8 +239,7 @@
           expect(MetricsService).to receive(:increment_counter).with(
             hash_including(
               metric_name: "deleted_conferences.successful",
-              metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-              by: 2
+              metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
             )
           )
           subject
@@ -270,8 +267,7 @@
             expect(MetricsService).to receive(:increment_counter).with(
               hash_including(
                 metric_name: "deleted_conferences.failed",
-                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-                by: 2
+                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
               )
             )
             subject
@@ -295,16 +291,14 @@
             expect(MetricsService).to receive(:increment_counter).with(
               hash_including(
                 metric_name: "deleted_conferences.successful",
-                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-                by: 2
+                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
               )
             )
 
             expect(MetricsService).to receive(:increment_counter).with(
               hash_including(
                 metric_name: "deleted_conferences.failed",
-                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME,
-                by: 2
+                metric_group: Constants.DATADOG_METRICS.HEARINGS.VIRTUAL_HEARINGS_GROUP_NAME
               )
             )
 
diff --git a/spec/services/metrics_service_spec.rb b/spec/services/metrics_service_spec.rb
index 9b349e84ebe..da2df30db23 100644
--- a/spec/services/metrics_service_spec.rb
+++ b/spec/services/metrics_service_spec.rb
@@ -63,7 +63,7 @@
               service: service,
               endpoint: name
             },
-            sent_to: [["rails_console"], "datadog", "dynatrace"],
+            sent_to: [["rails_console"], "dynatrace"],
             sent_to_info: {
               metric_group: "service",
               metric_name: "request_latency",