diff --git a/manifests/nagios/config.pp b/manifests/nagios/config.pp
index 1c936e3..400431f 100644
--- a/manifests/nagios/config.pp
+++ b/manifests/nagios/config.pp
@@ -12,7 +12,7 @@ class confdroid_nagios::nagios::config (
     require confdroid_nagios::nagios::objects::add_contact_rules
     require confdroid_nagios::nagios::objects::add_contactgroups_rules
     require confdroid_nagios::nagios::objects::add_hostgroup_rules
-    #require confdroid_nagios::nagios::objects::add_servicegroup_rules
+    require confdroid_nagios::nagios::objects::add_servicegroup_rules
     #require confdroid_nagios::nagios::objects::add_timeperiod_rules
     require confdroid_nagios::nagios::resources::resource
   }
diff --git a/manifests/nagios/objects/add_servicegroup_rules.pp b/manifests/nagios/objects/add_servicegroup_rules.pp
new file mode 100644
index 0000000..9181645
--- /dev/null
+++ b/manifests/nagios/objects/add_servicegroup_rules.pp
@@ -0,0 +1,39 @@
+## confdroid_nagios::nagios::objects::add_servicegroup_rules.pp
+# Module name: confdroid_nagios
+# Author: 12ww1160 (12ww1160@confdroid.com)
+# @summary  Class manages /etc/nagios_conf.d/nagios_servicegroups_add.cfg and
+#    additional servicegroups through external Puppet rules via define.
+# @example
+#   confdroid_nagios::nagios::objects::add_servicegroups { 'example_servicegroup':
+#     ng_servicegroup_name   => 'example_servicegroup',
+#     ng_servicegroup_alias  => 'Example Servicegroup',
+#   }
+################################################################################
+class confdroid_nagios::nagios::objects::add_servicegroup_rules (
+
+) inherits confdroid_nagios::params {
+  if $ng_nagios_server == $fqdn {
+    # manage /etc/nagios_conf.d/nagios_servicegroups_add.cfg
+
+    concat { $ng_tgt_servicegroup_add:
+      ensure   => present,
+      path     => $ng_tgt_servicegroup_add,
+      owner    => 'nagios',
+      group    => 'nagios',
+      mode     => '0640',
+      selrange => s0,
+      selrole  => object_r,
+      seltype  => nagios_etc_t,
+      seluser  => system_u,
+      notify   => Service[$ng_nagios_service],
+    }
+
+    # manage file header
+
+    concat::fragment { 'servicegroups_header':
+      target  => $ng_tgt_servicegroup_add,
+      content => template($ng_tgt_svcgrp_head_erb),
+      order   => '000',
+    }
+  }
+}
diff --git a/manifests/nagios/objects/add_servicegroups.pp b/manifests/nagios/objects/add_servicegroups.pp
new file mode 100644
index 0000000..9729688
--- /dev/null
+++ b/manifests/nagios/objects/add_servicegroups.pp
@@ -0,0 +1,35 @@
+## confdroid_nagios::nagios::objects::add_servicegroups.pp
+# Module name: confdroid_nagios
+# Author: 12ww1160 (12ww1160@confdroid.com)
+# # License:
+# @summary  define populates /etc/nagios/conf.d/nagios_servicegroups_add through
+#   external Puppet rules.
+# @example
+#   confdroid_nagios::nagios::objects::add_servicegroups { 'example_servicegroup':
+#     ng_servicegroup_name   => 'example_servicegroup',
+#     ng_servicegroup_alias  => 'Example servicegroup',
+#   }
+# @param [string] ng_servicegroup_name Specify the servicegroup short name
+# @param [string] ng_servicegroup_alias Specify the servicegroup alias
+#   (long name).
+# @param [string] ng_servicegroup_register Whether you want to register the
+#   servicegroup
+###############################################################################
+define confdroid_nagios::nagios::objects::add_servicegroups (
+
+  Optional[String] $ng_servicegroup_name      = undef,
+  Optional[String] $ng_servicegroup_alias     = undef,
+  String $ng_servicegroup_register            = '1',
+
+) {
+  $ng_nagios_server         = $confdroid_nagios::params::ng_nagios_server
+  $ng_tgt_servicegroup_add  = $confdroid_nagios::params::ng_tgt_servicegroup_add
+  $ng_tgt_svcgrp_rule_erb   = $confdroid_nagios::params::ng_tgt_svcgrp_rule_erb
+
+  if $ng_nagios_server == $fqdn {
+    concat::fragment { $name:
+      target  => $ng_tgt_servicegroup_add,
+      content => template($ng_tgt_svcgrp_rule_erb),
+    }
+  }
+}
diff --git a/manifests/params.pp b/manifests/params.pp
index d5da578..2ad0182 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -170,7 +170,7 @@ class confdroid_nagios::params (
   $os_release               = $facts['os']['release']['major']
 
 # service
-  $ng_nagios_service          = $ng_users
+  $ng_nagios_service          = 'nagios'
 
 # directories
   $ng_main_dir                = '/etc/nagios'