diff --git a/.github/scripts/common-test.mk b/.github/scripts/common-test.mk
new file mode 100644
index 000000000..e96313ce0
--- /dev/null
+++ b/.github/scripts/common-test.mk
@@ -0,0 +1,54 @@
+CPUNAME ?= cpu1
+INSTALL_DIR ?= $(O)/exe
+
+ALL_TESTRUNNER_EXES := $(shell ls $(INSTALL_DIR)/$(CPUNAME)/*testrunner.exe)
+ALL_UT_EXES := $(shell ls $(INSTALL_DIR)/$(CPUNAME)/*UT.exe)
+ALL_FUNC_TEST_EXES := $(shell ls $(INSTALL_DIR)/$(CPUNAME)/*test.exe)
+
+# These functional tests require a network stack,
+# so they can be skipped on platforms that may not have network
+ifeq ($(SKIP_NET_TESTS), true)
+	SKIP_FUNC_TEST := 	\
+		$(INSTALL_DIR)/$(CPUNAME)/network-api-test.exe	\
+		$(INSTALL_DIR)/$(CPUNAME)/select-test.exe
+	ALL_FUNC_TEST_EXES := $(filter-out $(SKIP_FUNC_TEST),$(ALL_FUNC_TEST_EXES))
+endif
+
+ALL_TESTRUNNER_TEST_LIST := $(basename $(ALL_TESTRUNNER_EXES))
+ALL_UT_TEST_LIST := $(basename $(ALL_UT_EXES))
+ALL_FUNC_TEST_LIST := $(basename $(ALL_FUNC_TEST_EXES))
+
+
+ALL_TEST_LIST := \
+	$(ALL_TESTRUNNER_TEST_LIST) \
+	$(ALL_UT_TEST_LIST) \
+	$(ALL_FUNC_TEST_LIST) \
+
+.PHONY: clean_logs \
+	all_tests \
+	all_logs \
+	all_checks \
+	all_testrunner_logs \
+	all_ut_logs \
+	all_func_test_logs \
+
+clean_logs:
+	rm -f $(addsuffix .check,$(ALL_TEST_LIST)) \
+		$(addsuffix .log,$(ALL_TEST_LIST))
+	rm -f $(INSTALL_DIR)/$(CPUNAME)/failed-tests.log
+
+# run all tests without checking success
+all_logs: $(addsuffix .log,$(ALL_TEST_LIST))
+# run all tests and check success
+all_checks: $(addsuffix .check,$(ALL_TEST_LIST))
+
+# run just tests with suffix *testrunner.exe
+all_testrunner_logs: $(addsuffix .log,$(ALL_TESTRUNNER_TEST_LIST))
+# run just tests with suffix *UT.exe
+all_ut_logs: $(addsuffix .log,$(ALL_UT_TEST_LIST))
+# run just tests with suffix *test.exe
+all_func_test_logs: $(addsuffix .log,$(ALL_FUNC_TEST_LIST))
+
+all_tests: all_checks
+	@echo  '*** SUCCESS ***'
+
diff --git a/.github/scripts/rtems-test.mk b/.github/scripts/rtems-test.mk
new file mode 100644
index 000000000..1fe1d5783
--- /dev/null
+++ b/.github/scripts/rtems-test.mk
@@ -0,0 +1,63 @@
+SKIP_NET_TESTS := true
+
+# At a minimum the variable O must be set by the caller
+ifeq ($(O),)
+$(error O must be set prior to native-test.mk)
+endif
+
+CFE_IMG_MB ?= 32
+CFE_DISK_IMG ?= $(INSTALL_DIR)/$(CPUNAME)/nonvol-disk.img
+CFE_FS_IMG ?= $(INSTALL_DIR)/$(CPUNAME)/nonvol-fs.img
+QEMU_COMMAND ?= qemu-system-i386 -m 128
+MACADDR = 00:04:9F$(shell head -c 3 /dev/urandom | hexdump -v -e '/1 ":%02X"')
+RTEMS_VERSION ?= i686-rtems5
+
+# default rule to just create qemu disk image
+all: cfe-disk
+
+# include list of all unit tests to run
+include .github/scripts/common-test.mk
+
+.PHONY: run cfe-disk
+.SECONDARY: $(addsuffix .log,$(ALL_TEST_LIST)))
+
+cfe-disk: $(CFE_DISK_IMG)
+
+$(CFE_DISK_IMG): FS_SIZE := $(shell echo $$(($(CFE_IMG_MB) * 1048576)))
+
+$(CFE_DISK_IMG): $(wildcard $(O)/$(RTEMS_VERSION)/default_cpu1/osal/unit-tests/osloader-test/utmod/*) $(wildcard $(INSTALL_DIR)/$(CPUNAME)/eeprom/*)
+	# Basic disk
+	truncate -s $(FS_SIZE)  $(@)
+	parted -s $(@) -- mklabel msdos
+	parted -a none -s $(@) -- mkpart primary fat32 63s -1s
+	# File system partition
+	mkfs.fat --offset 63 $(@)
+	mcopy -i $(@)@@32256 -sv $(O)/$(RTEMS_VERSION)/default_cpu1/osal/unit-tests/osloader-test/utmod :: || /bin/true
+	mcopy -i $(@)@@32256 -sv $(INSTALL_DIR)/$(CPUNAME)/eeprom ::
+
+run: $(CFE_DISK_IMG)
+	$(QEMU_COMMAND) -display none -no-reboot -serial mon:stdio \
+	    -kernel $(INSTALL_DIR)/$(CPUNAME)/$(KERNEL_NAME).exe \
+	    -drive file=$(CFE_DISK_IMG),format=raw \
+    	-device i82557b,netdev=net0,mac=$(MACADDR) \
+	    -netdev user,id=net0,hostfwd=udp:127.0.0.1:1235-:1235 \
+			-append '--console=/dev/com1'
+
+clean_img:
+	rm -f $(INSTALL_DIR)/$(CPUNAME)/*.img
+
+%.cow: $(CFE_DISK_IMG)
+	qemu-img create -o backing_file=$(notdir $(CFE_DISK_IMG)),backing_fmt=raw -f qcow2 $(@)
+
+%.log: %.exe %.cow
+	$(QEMU_COMMAND) -no-reboot -display none \
+	    -kernel $(<) \
+	    -append '--batch-mode --console=/dev/com1' \
+	    -drive file=$(*).cow,format=qcow2 \
+	    -device i82557b,netdev=net0,mac=$(MACADDR) \
+	    -netdev user,id=net0 \
+	    -serial file:$(@).tmp
+	@mv -v $(@).tmp $(@)
+
+%.check: %.log
+	@(grep -q '^Application exit status: SUCCESS' $(<)) || (echo $(*): ---FAIL--- | tee -a $(INSTALL_DIR)/$(CPUNAME)/failed-tests.log; /bin/false )
diff --git a/.github/workflows/README.md b/.github/workflows/README.md
index 4a321cc83..2a7a43266 100644
--- a/.github/workflows/README.md
+++ b/.github/workflows/README.md
@@ -14,6 +14,14 @@ This action builds, tests, and runs the cFS bundle omitting deprecated code.
 
 Build, Test, and Run [OMIT_DEPRECATED=true] runs for every push and every pull request on all branches of cFS in Github Actions. For more information on the OMIT_DEPRECATED flag, see [global_build_options.cmake](https://github.com/nasa/cFE/blob/063b4d8a9c4a7e822af5f3e4017599159b985bb0/cmake/sample_defs/global_build_options.cmake). 
 
+## Build and Test in RTEMS [OMIT_DEPRECATED=true]
+[![Build and Test rtems 4.11 [OMIT_DEPRECATED=true]](https://github.com/nasa/cFS/actions/workflows/build-cfs-rtems4.11.yml/badge.svg)](https://github.com/nasa/cFS/actions/workflows/build-cfs-rtems4.11.yml)
+[![Build and Test rtems 5 [OMIT_DEPRECATED=true]](https://github.com/nasa/cFS/actions/workflows/build-cfs-rtems5.yml/badge.svg)](https://github.com/nasa/cFS/actions/workflows/build-cfs-rtems5.yml)
+
+This action builds and tests the cFS bundle omitting deprecated code in both RTEMS 4.11 and RTEMS 5.
+
+Build and Test in RTEMS 4.11 and 5 runs for every push and every pull request on all branches of cFS in Github Actions.
+
 ## CodeQL Analysis
 [![CodeQL Analaysis](https://github.com/nasa/cfs/actions/workflows/codeql-build.yml/badge.svg)](https://github.com/nasa/cfs/actions/workflows/codeql-build.yml)
 
diff --git a/.github/workflows/build-cfs-rtems4.11.yml b/.github/workflows/build-cfs-rtems4.11.yml
new file mode 100644
index 000000000..16081bb75
--- /dev/null
+++ b/.github/workflows/build-cfs-rtems4.11.yml
@@ -0,0 +1,127 @@
+name: Build and Test rtems 4.11 [OMIT_DEPRECATED=true]
+
+# Run every time a new commit pushed or for pull requests
+on:
+  push:
+  pull_request:
+
+env:
+  OMIT_DEPRECATED: true
+
+jobs:
+  #Checks for duplicate actions. Skips push actions if there is a matching or duplicate pull-request action. 
+  check-for-duplicates:
+    runs-on: ubuntu-latest
+    # Map a step output to a job output
+    outputs:
+        should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@master
+        with:
+          concurrent_skipping: 'same_content'
+          skip_after_successful_duplicate: 'true'
+          do_not_skip: '["pull_request", "workflow_dispatch", "schedule"]'
+          
+  build-cfs:
+    #Continue if check-for-duplicates found no duplicates. Always runs for pull-requests.
+    needs: check-for-duplicates
+    if: ${{ needs.check-for-duplicates.outputs.should_skip != 'true' }}
+    name: Build
+    runs-on: ubuntu-18.04
+    container: nmullane/qemu_rtems:4.11
+
+    strategy:
+      fail-fast: false
+      matrix:
+        buildtype: [debug, release]
+
+    # Set the type of machine to run on
+    env:
+      BUILDTYPE: ${{ matrix.buildtype }}
+      # Set home to where rtems is located
+      HOME: /root
+
+    steps:
+      # Check out the cfs bundle
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      # Setup the build system
+      - name: Copy Files
+        run: |
+          cp ./cfe/cmake/Makefile.sample Makefile
+          cp -r ./cfe/cmake/sample_defs sample_defs
+
+      # Setup the build system
+      - name: Make Prep
+        run: make SIMULATION=i686-rtems4.11 prep
+
+      - name: Make
+        run: make
+
+  test-cfs:
+    name: Test
+    runs-on: ubuntu-18.04
+    container: nmullane/qemu_rtems:4.11
+
+    needs: build-cfs
+
+    strategy:
+      fail-fast: false
+      matrix:
+        buildtype: [debug, release]
+
+    # Set the type of machine to run on
+    env:
+      BUILDTYPE: ${{ matrix.buildtype }}
+      ENABLE_UNIT_TESTS: true
+      # Set home to where rtems is located
+      HOME: /root
+      # Disable mcopy check otherwise disk image build fails
+      MTOOLS_SKIP_CHECK: 1
+
+
+    steps:
+      # Checks out a copy of your repository on the ubuntu-latest machine
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      # Setup the build system
+      - name: Copy Files
+        run: |
+          cp ./cfe/cmake/Makefile.sample Makefile
+          cp -r ./cfe/cmake/sample_defs sample_defs
+
+      # Setup the build system
+      - name: Make
+        run: | 
+          make SIMULATION=i686-rtems4.11 prep
+          make install
+
+      - name: Test
+        #run: .github/scripts/qemu_test.sh && .github/scripts/log_failed_tests.sh
+        run: make O=build SKIP_NET_TESTS=true RTEMS_VERSION=i686-rtems4.11 -f .github/scripts/rtems-test.mk all_tests -k
+
+      - name: Output Failed Tests
+        # Runs only if a previous step has failed
+        if: failure()
+        run: |
+          # Check if failed-tests is empty or not
+          if [ -s ./build/exe/cpu1/failed-tests.log ]; then
+            echo "Failing tests found:"
+            cat ./build/exe/cpu1/failed-tests.log
+          fi
+
+      # Always archive test logs
+      - name: Archive cFS Test Artifacts
+        uses: actions/upload-artifact@v2
+        # Runs even if previous steps have failed
+        if: always()
+        with:
+          name: cFS-rtems-log-summary-${{ matrix.buildtype }}
+          path: ./build/exe/cpu1/*.log
diff --git a/.github/workflows/build-cfs-rtems5.yml b/.github/workflows/build-cfs-rtems5.yml
new file mode 100644
index 000000000..9e8629f0b
--- /dev/null
+++ b/.github/workflows/build-cfs-rtems5.yml
@@ -0,0 +1,125 @@
+name: Build and Test rtems 5 [OMIT_DEPRECATED=true]
+
+# Run every time a new commit pushed or for pull requests
+on:
+  push:
+  pull_request:
+
+env:
+  OMIT_DEPRECATED: true
+
+jobs:
+  #Checks for duplicate actions. Skips push actions if there is a matching or duplicate pull-request action. 
+  check-for-duplicates:
+    runs-on: ubuntu-latest
+    # Map a step output to a job output
+    outputs:
+        should_skip: ${{ steps.skip_check.outputs.should_skip }}
+    steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@master
+        with:
+          concurrent_skipping: 'same_content'
+          skip_after_successful_duplicate: 'true'
+          do_not_skip: '["pull_request", "workflow_dispatch", "schedule"]'
+          
+  build-cfs:
+    #Continue if check-for-duplicates found no duplicates. Always runs for pull-requests.
+    needs: check-for-duplicates
+    if: ${{ needs.check-for-duplicates.outputs.should_skip != 'true' }}
+    name: Build
+    runs-on: ubuntu-18.04
+    container: nmullane/qemu_rtems:5
+
+    strategy:
+      fail-fast: false
+      matrix:
+        buildtype: [debug, release]
+
+    # Set the type of machine to run on
+    env:
+      BUILDTYPE: ${{ matrix.buildtype }}
+      # Set home to where rtems is located
+      HOME: /root
+
+    steps:
+      # Check out the cfs bundle
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      # Setup the build system
+      - name: Copy Files
+        run: |
+          cp ./cfe/cmake/Makefile.sample Makefile
+          cp -r ./cfe/cmake/sample_defs sample_defs
+
+      # Setup the build system
+      - name: Make Prep
+        run: make SIMULATION=i686-rtems5 prep
+
+      - name: Make
+        run: make
+
+  test-cfs:
+    name: Test
+    runs-on: ubuntu-18.04
+    container: nmullane/qemu_rtems:5
+
+    needs: build-cfs
+
+    strategy:
+      fail-fast: false
+      matrix:
+        buildtype: [debug, release]
+
+    # Set the type of machine to run on
+    env:
+      BUILDTYPE: ${{ matrix.buildtype }}
+      ENABLE_UNIT_TESTS: true
+      # Set home to where rtems is located
+      HOME: /root
+      # Disable mcopy check otherwise disk image build fails
+      MTOOLS_SKIP_CHECK: 1
+
+
+    steps:
+      # Checks out a copy of your repository on the ubuntu-latest machine
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      # Setup the build system
+      - name: Copy Files
+        run: |
+          cp ./cfe/cmake/Makefile.sample Makefile
+          cp -r ./cfe/cmake/sample_defs sample_defs
+
+      # Setup the build system
+      - name: Make
+        run: |
+          make SIMULATION=i686-rtems5 prep
+          make install
+
+      - name: Test
+        #run: .github/scripts/qemu_test.sh && .github/scripts/log_failed_tests.sh
+        run: make O=build SKIP_NET_TESTS=true RTEMS_VERSION=i686-rtems5 -f .github/scripts/rtems-test.mk all_tests -k
+
+      - name: Output Failed Tests
+        run: |
+          # Check if failed-tests is empty or not
+          if [ -s ./build/exe/cpu1/failed-tests.log ]; then
+            echo "Failing tests found:"
+            cat ./build/exe/cpu1/failed-tests.log
+          fi
+
+      # Always archive test logs
+      - name: Archive cFS Test Artifacts
+        uses: actions/upload-artifact@v2
+        # Runs even if previous steps have failed
+        if: always()
+        with:
+          name: cFS-rtems-log-summary-${{ matrix.buildtype }}
+          path: ./build/exe/cpu1/*.log