diff --git a/lib/muchos/ec2.py b/lib/muchos/ec2.py
index 90cb572e..f4f02a25 100644
--- a/lib/muchos/ec2.py
+++ b/lib/muchos/ec2.py
@@ -301,6 +301,30 @@ def print_nodes(nodes):
                 node.get("PublicIpAddress", ""),
             )
 
+    def stop(self):
+        nodes = self.active_nodes()
+        print(
+            "The following {0} nodes in {1} cluster "
+            "will be stopped:".format(len(nodes), self.config.cluster_name)
+        )
+        ec2 = boto3.client("ec2")
+        for node in nodes:
+            ec2.stop_instances(InstanceIds=[node["InstanceId"]])
+        self.print_nodes(nodes)
+        print("Stopped nodes.")
+
+    def start(self):
+        nodes = self.active_nodes()
+        print(
+            "The following {0} nodes in {1} cluster "
+            "will be started:".format(len(nodes), self.config.cluster_name)
+        )
+        ec2 = boto3.client("ec2")
+        for node in nodes:
+            ec2.start_instances(InstanceIds=[node["InstanceId"]])
+        self.print_nodes(nodes)
+        print("Started nodes.")
+
     def terminate(self):
         nodes = self.active_nodes()
         print(
diff --git a/lib/muchos/existing.py b/lib/muchos/existing.py
index bb3c7d3c..df3abc0e 100644
--- a/lib/muchos/existing.py
+++ b/lib/muchos/existing.py
@@ -228,6 +228,20 @@ def terminate():
             "when cluster_type is set to 'existing'"
         )
 
+    @staticmethod
+    def stop():
+        exit(
+            "ERROR - 'stop' command cannot be used "
+            "when cluster_type is set to 'existing'"
+        )
+
+    @staticmethod
+    def start():
+        exit(
+            "ERROR - 'start' command cannot be used "
+            "when cluster_type is set to 'existing'"
+        )
+
     def ssh(self):
         self.wait_until_proxy_ready()
         fwd = ""
@@ -352,6 +366,10 @@ def perform(self, action):
             self.sync()
         elif action == "setup":
             self.setup()
+        elif action == "start":
+            self.start()
+        elif action == "stop":
+            self.stop()
         elif action == "ssh":
             self.ssh()
         elif action == "wipe":
diff --git a/lib/muchos/util.py b/lib/muchos/util.py
index 158ea920..8022d776 100644
--- a/lib/muchos/util.py
+++ b/lib/muchos/util.py
@@ -156,6 +156,8 @@ def parse_args(hosts_dir, input_args=None):
         + "  sync             Sync ansible directory on cluster proxy node\n"
         + "  config           Print configuration for that cluster. "
         "Requires '-p'. Use '-p all' for all config.\n"
+        + "  stop             Stops instance\n"
+        + "  start            Starts instance\n"
         + "  ssh              SSH to cluster proxy node\n"
         + "  kill             Kills processes on cluster started by Muchos\n"
         + "  wipe             Wipes cluster data and kills processes\n"