diff --git a/sitewide/groupadmin.py b/sitewide/groupadmin.py
new file mode 100644
index 0000000..32ba007
--- /dev/null
+++ b/sitewide/groupadmin.py
@@ -0,0 +1,123 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""A class to display user group admin page."""
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import logging
+import time
+
+import ezt
+
+from framework import framework_helpers
+from framework import permissions
+from framework import servlet
+from framework import urls
+from proto import usergroup_pb2
+from services import usergroup_svc
+from sitewide import group_helpers
+
+
+class GroupAdmin(servlet.Servlet):
+  """The group admin page."""
+
+  _PAGE_TEMPLATE = 'sitewide/group-admin-page.ezt'
+
+  def AssertBasePermission(self, mr):
+    """Assert that the user has the permissions needed to view this page."""
+    super(GroupAdmin, self).AssertBasePermission(mr)
+
+    _, owner_ids_dict = self.services.usergroup.LookupMembers(
+        mr.cnxn, [mr.viewed_user_auth.user_id])
+    owner_ids = owner_ids_dict[mr.viewed_user_auth.user_id]
+    if not permissions.CanEditGroup(
+        mr.perms, mr.auth.effective_ids, owner_ids):
+      raise permissions.PermissionException(
+          'User is not allowed to edit a user group')
+
+  def GatherPageData(self, mr):
+    """Build up a dictionary of data values to use when rendering the page."""
+    group_id = mr.viewed_user_auth.user_id
+    group_settings = self.services.usergroup.GetGroupSettings(
+        mr.cnxn, group_id)
+    visibility_levels = group_helpers.BuildUserGroupVisibilityOptions()
+    initial_visibility = group_helpers.GroupVisibilityView(
+        group_settings.who_can_view_members)
+    group_types = group_helpers.BuildUserGroupTypeOptions()
+    import_group = bool(group_settings.ext_group_type)
+    if import_group:
+      initial_group_type = group_helpers.GroupTypeView(
+          group_settings.ext_group_type)
+    else:
+      initial_group_type = ''
+
+    if group_settings.friend_projects:
+      initial_friendprojects = ', '.join(
+          list(self.services.project.LookupProjectNames(
+              mr.cnxn, group_settings.friend_projects).values()))
+    else:
+      initial_friendprojects = ''
+
+    return {
+        'admin_tab_mode': 'st2',
+        'groupadmin': True,
+        'groupid': group_id,
+        'groupname': mr.viewed_username,
+        'group_types': group_types,
+        'import_group': import_group or '',
+        'initial_friendprojects': initial_friendprojects,
+        'initial_group_type': initial_group_type,
+        'initial_visibility': initial_visibility,
+        'offer_membership_editing': True,
+        'visibility_levels': visibility_levels,
+        }
+
+  def ProcessFormData(self, mr, post_data):
+    """Process the posted form."""
+    # 1. Gather data from the request.
+    group_name = mr.viewed_username
+    group_id = mr.viewed_user_auth.user_id
+
+    if post_data.get('import_group'):
+      vis_level = usergroup_pb2.MemberVisibility.OWNERS
+      ext_group_type = post_data.get('group_type')
+      friend_projects = ''
+      if not ext_group_type:
+        mr.errors.groupimport = 'Please provide external group type'
+      else:
+        ext_group_type = usergroup_pb2.GroupType(int(ext_group_type))
+    else:
+      vis_level = post_data.get('visibility')
+      ext_group_type = None
+      friend_projects = post_data.get('friendprojects', '')
+      if vis_level:
+        vis_level = usergroup_pb2.MemberVisibility(int(vis_level))
+      else:
+        mr.errors.groupimport = 'Cannot update settings for imported group'
+
+    if not mr.errors.AnyErrors():
+      project_ids, error = self.services.usergroup.ValidateFriendProjects(
+          mr.cnxn, self.services, friend_projects)
+      if error:
+        mr.errors.friendprojects = error
+
+    # 2. Call services layer to save changes.
+    if not mr.errors.AnyErrors():
+      group_settings = usergroup_pb2.UserGroupSettings(
+        who_can_view_members=vis_level,
+        ext_group_type=ext_group_type,
+        friend_projects=project_ids)
+      self.services.usergroup.UpdateSettings(
+          mr.cnxn, group_id, group_settings)
+
+    # 3. Determine the next page in the UI flow.
+    if mr.errors.AnyErrors():
+      self.PleaseCorrect(mr, initial_name=group_name)
+    else:
+      return framework_helpers.FormatAbsoluteURL(
+          mr, '/g/%s%s' % (group_name, urls.GROUP_ADMIN),
+          include_project=False, saved=1, ts=int(time.time()))