diff --git a/paasta_tools/contrib/delete_old_marathon_deployments.py b/paasta_tools/contrib/delete_old_marathon_deployments.py
new file mode 100755
index 0000000000..07c3faa05f
--- /dev/null
+++ b/paasta_tools/contrib/delete_old_marathon_deployments.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python
+# Copyright 2015 Yelp Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import argparse
+import datetime
+import logging
+
+import dateutil.parser
+from dateutil import tz
+from pytimeparse import timeparse
+
+from paasta_tools import marathon_tools
+
+
+log = logging.getLogger('__main__')
+logging.basicConfig()
+
+
+def parse_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-a', '--age', dest='age', type=timedelta_type, default='1h',
+                        help="Max age of a Marathon deployment before it is stopped."
+                        "Any pytimeparse unit is supported")
+    parser.add_argument('-n', '--dry-run', action="store_true",
+                        help="Don't actually stop any Marathon deployments")
+    parser.add_argument('-v', '--verbose', action='store_true')
+    options = parser.parse_args()
+    return options
+
+
+def timedelta_type(value):
+    """Return the :class:`datetime.datetime.DateTime` for a time in the past.
+    :param value: a string containing a time format supported by :mod:`pytimeparse`
+    """
+    if value is None:
+        return None
+    return datetime_seconds_ago(timeparse.timeparse(value))
+
+
+def datetime_seconds_ago(seconds):
+    return now() - datetime.timedelta(seconds=seconds)
+
+
+def now():
+    return datetime.datetime.now(tz.tzutc())
+
+
+def delete_deployment_if_too_old(client, deployment, max_date, dry_run):
+    started_at = dateutil.parser.parse(deployment.version)
+    age = now() - started_at
+    if started_at < max_date:
+        if dry_run is True:
+            log.warning("Would delete %s for %s as it is %s old" % (deployment.id, deployment.affected_apps[0], age))
+        else:
+            log.warning("Deleting %s for %s as it is %s old" % (deployment.id, deployment.affected_apps[0], age))
+            client.delete_deployment(deployment_id=deployment.id, force=True)
+    else:
+        if dry_run is True:
+            log.warning("NOT deleting %s for %s as it is %s old" % (deployment.id, deployment.affected_apps[0], age))
+
+
+def main():
+    args = parse_args()
+
+    config = marathon_tools.load_marathon_config()
+    client = marathon_tools.get_marathon_client(config.get_url(), config.get_username(), config.get_password())
+
+    for deployment in client.list_deployments():
+        delete_deployment_if_too_old(
+            client=client,
+            deployment=deployment,
+            max_date=args.age,
+            dry_run=args.dry_run,
+        )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/requirements.txt b/requirements.txt
index cde8141f40..b553f2e501 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,6 +32,7 @@ pycrypto==2.6.1
 pysensu-yelp==0.2.2
 python-daemon==1.5.2
 python-dateutil==2.4.2
+pytimeparse==1.1.5
 pytz==2014.10
 requests==2.6.2
 requests-cache==0.4.10
diff --git a/setup.py b/setup.py
index be7affa29b..5876c8f8fe 100644
--- a/setup.py
+++ b/setup.py
@@ -49,6 +49,7 @@
         'ordereddict >= 1.1',
         'path.py >= 8.1',
         'pysensu-yelp >= 0.2.2',
+        'pytimeparse >= 1.1.0',
         'python-dateutil >= 2.4.0',
         'requests == 2.6.2',
         'requests-cache >= 0.4.10, <= 0.5.0',