diff --git a/xos/synchronizer/steps/sync_controller_slices.py b/xos/synchronizer/steps/sync_controller_slices.py
new file mode 100644
index 0000000..58a0896
--- /dev/null
+++ b/xos/synchronizer/steps/sync_controller_slices.py
@@ -0,0 +1,76 @@
+import os
+import base64
+from collections import defaultdict
+from netaddr import IPAddress, IPNetwork
+from django.db.models import F, Q
+from xos.config import Config
+from synchronizers.base.syncstep import *
+from core.models import *
+from synchronizers.base.ansible import *
+from xos.logger import observer_logger as logger
+import json
+
+class SyncControllerSlices(SyncStep):
+    provides=[Slice]
+    requested_interval=0
+    observes=ControllerSlice
+    playbook='sync_controller_slices.yaml'
+
+    def map_sync_inputs(self, controller_slice):
+        logger.info("sync'ing slice controller %s" % controller_slice)
+
+        if not controller_slice.controller.admin_user:
+            logger.info("controller %r has no admin_user, skipping" % controller_slice.controller)
+            return
+
+        controller_users = ControllerUser.objects.filter(user=controller_slice.slice.creator,
+                                                             controller=controller_slice.controller)
+        if not controller_users:
+            raise Exception("slice creator %s has not account at controller %s" % (controller_slice.slice.creator, controller_slice.controller.name))
+        else:
+            controller_user = controller_users[0]
+
+        max_instances=int(controller_slice.slice.max_instances)
+        slice_fields = {
+            'endpoint': controller_slice.controller.auth_url,
+            'admin_user': controller_slice.controller.admin_user,
+            'admin_password': controller_slice.controller.admin_password,
+            'slice_name': controller_slice.slice.name,
+            'slice_description': controller_slice.slice.description,
+            'name': controller_user.user.email,
+            'ansible_tag': '%s@%s'%(controller_slice.slice.name,controller_slice.controller.name),
+            'image': controller_slice.slice.default_image.name,
+            'addresses': '10.168.2.0/24',          # FIXME
+            'gateway_ip': '10.168.2.1',            # FIXME
+            'gateway_mac': '02:42:0a:a8:02:01',    # FIXME
+            'max_instances': max_instances
+        }
+
+        return slice_fields
+
+    def map_sync_outputs(self, controller_slice, res):
+        if (not controller_slice.tenant_id):
+            controller_slice.tenant_id = "Not implemented"
+            controller_slice.backend_status = '1 - OK'
+            controller_slice.save()
+
+
+    def map_delete_inputs(self, controller_slice):
+        controller_users = ControllerUser.objects.filter(user=controller_slice.slice.creator,
+                                                              controller=controller_slice.controller)
+        if not controller_users:
+            raise Exception("slice creator %s has not account at controller %s" % (controller_slice.slice.creator, controller_slice.controller.name))
+        else:
+            controller_user = controller_users[0]
+
+        slice_fields = {
+            'endpoint': controller_slice.controller.auth_url,
+            'admin_user': controller_slice.controller.admin_user,
+            'admin_password': controller_slice.controller.admin_password,
+            'slice': controller_slice.slice.name,
+            'slice_description': controller_slice.slice.description,
+            'name': controller_user.user.email,
+            'ansible_tag': '%s@%s'%(controller_slice.slice.name,controller_slice.controller.name),
+            'delete': True
+        }
+	return slice_fields