diff --git a/metadata/service/aggregator/output/nagios.yml b/metadata/service/aggregator/output/nagios.yml
index 7c30db1..ae167c1 100644
--- a/metadata/service/aggregator/output/nagios.yml
+++ b/metadata/service/aggregator/output/nagios.yml
@@ -1,5 +1,12 @@
 parameters:
+  _param:
+    nagios_username: nagiosadmin
+    nagios_default_host_alarm_clusters: 00-clusters
+    nagios_host_dimension_key: nagios_host
   heka:
     aggregator:
-      nagios_host_dimension_key: nagios_host
-      nagios_host: ${_param:nagios_host}
\ No newline at end of file
+      nagios_host: ${_param:nagios_host}
+      nagios_username: ${_param:nagios_username}
+      nagios_password: ${_param:nagios_password}
+      nagios_host_dimension_key: ${_param:nagios_host_dimension_key}
+      nagios_default_host_alarm_clusters: ${_param:nagios_default_host_alarm_clusters}
diff --git a/metadata/service/aggregator/output/sensu.yml b/metadata/service/aggregator/output/sensu.yml
index 394acb6..37b2cf8 100644
--- a/metadata/service/aggregator/output/sensu.yml
+++ b/metadata/service/aggregator/output/sensu.yml
@@ -1,5 +1,7 @@
 parameters:
+  _param:
+    sensu_source_dimension_key: nagios_host
   heka:
     aggregator:
-      sensu_source_dimension_key: nagios_host
+      sensu_source_dimension_key: ${_param:sensu_source_dimension_key}
       sensu_host: 127.0.0.1