diff --git a/app/controllers/user_admin_controller.rb b/app/controllers/user_admin_controller.rb
--- a/app/controllers/user_admin_controller.rb
+++ b/app/controllers/user_admin_controller.rb
@@ -151,6 +151,41 @@
     end
   end
 
+  # admin management
+
+  def admin
+    @admins = User.find(:all).find_all {|user| user.admin? }
+  end
+
+  def grant_admin
+    login = params[:login]
+    user = User.find_by_login(login)
+    if user!=nil
+      admin_role = Role.find_by_name('admin')
+      user.roles << admin_role
+    else
+      flash[:notice] = 'Unknown user'
+    end
+    flash[:notice] = 'User added as admins'
+    redirect_to :action => 'admin'
+  end
+
+  def revoke_admin
+    user = User.find(params[:id])
+    if user==nil
+      flash[:notice] = 'Unknown user'
+      redirect_to :action => 'admin' and return
+    elsif user.login == 'root'
+      flash[:notice] = 'You cannot revoke admisnistrator permission from root.'
+      redirect_to :action => 'admin' and return
+    end
+
+    admin_role = Role.find_by_name('admin')
+    user.roles.delete(admin_role)
+    flash[:notice] = 'User permission revoked'
+    redirect_to :action => 'admin'
+  end
+
   protected
 
   def random_password(length=5)
diff --git a/app/views/user_admin/admin.html.haml b/app/views/user_admin/admin.html.haml
new file mode 100644
--- /dev/null
+++ b/app/views/user_admin/admin.html.haml
@@ -0,0 +1,25 @@
+%h1 Administrators
+
+%table
+  %tr
+    %th #
+    %th Login
+    %th Full name
+    %th 
+  - @admins.each_with_index do |user, i|
+    %tr
+      %td= i+1
+      %td= user.login
+      %td= user.full_name
+      %td
+        - if user.login!='root'
+          = link_to '[revoke]', :action => 'revoke_admin', :id => user.id
+%hr
+
+- form_tag :action => 'grant_admin' do
+  Grant admin permission to:
+  = text_field_tag 'login'
+  = submit_tag 'Grant'
+
+%hr/
+= link_to '[go back to index]', :action => 'index'
diff --git a/app/views/user_admin/list.rhtml b/app/views/user_admin/list.rhtml
--- a/app/views/user_admin/list.rhtml
+++ b/app/views/user_admin/list.rhtml
@@ -29,6 +29,7 @@
 <b>What else: </b>
 <%= link_to '[New user]', :action => 'new' %>
 <%= link_to '[New list of users]', :action => 'new_list' %>
+<%= link_to '[View administrators]', :action => 'admin' %>
 <%= link_to '[Random passwords]', :action => 'random_all_passwords' %>
 <%= link_to '[View active users]', :action => 'active' %>