diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -41,6 +41,7 @@
 
     if Configuration.multicontests? 
       user = User.find(session[:user_id])
+      return true if user.admin?
       begin
         if user.contest_stat(true).forced_logout
           flash[:notice] = 'You have been automatically logged out.'
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
@@ -1,5 +1,7 @@
 class UserAdminController < ApplicationController
 
+  include MailHelperMethods
+
   before_filter :admin_authorization
 
   def index
@@ -215,6 +217,10 @@
           user.contest_stat.reset_timer_and_save
         end
 
+        if params[:notification_emails]
+          send_contest_update_notification_email(user, contest) 
+        end
+
         note << user.login
         users << user
       end
@@ -344,4 +350,19 @@
     end
   end
 
+  def send_contest_update_notification_email(user, contest)
+    contest_title_name = Configuration['contest.name']
+    contest_name = contest.name
+    subject = t('contest.notification.email_subject', {
+                  :contest_title_name => contest_title_name,
+                  :contest_name => contest_name })
+    body = t('contest.notification.email_body', {
+               :full_name => user.full_name,
+               :contest_title_name => contest_title_name,
+               :contest_name => contest.name,
+             })
+
+    logger.info body
+    send_mail(user.email, subject, body)
+  end
 end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -3,6 +3,8 @@
 
 class UsersController < ApplicationController
 
+  include MailHelperMethods
+
   before_filter :authenticate, :except => [:new, 
                                            :register, 
                                            :confirm, 
@@ -122,64 +124,35 @@
                              :login => user.login, 
                              :activation => user.activation_key)
     home_url = url_for(:controller => 'main', :action => 'index')
-    mail = TMail::Mail.new
-    mail.to = user.email
-    mail.from = Configuration['system.online_registration.from']
-    mail.subject = "[#{contest_name}] Confirmation"
-    mail.body = t('registration.email_body', {
-                    :full_name => user.full_name,
-                    :contest_name => contest_name,
-                    :login => user.login,
-                    :password => user.password,
-                    :activation_url => activation_url,
-                    :admin_email => admin_email
-                  })
+    subject = "[#{contest_name}] Confirmation"
+    body = t('registration.email_body', {
+               :full_name => user.full_name,
+               :contest_name => contest_name,
+               :login => user.login,
+               :password => user.password,
+               :activation_url => activation_url,
+               :admin_email => admin_email
+             })
 
-    logger.info mail.body
-
-    smtp_server = Configuration['system.online_registration.smtp']
+    logger.info body
 
-    begin
-      Net::SMTP.start(smtp_server) do |smtp|
-        smtp.send_message(mail.to_s, mail.from, mail.to)
-      end
-      result = true
-    rescue
-      result = false
-    end
-
-    return result
+    send_mail(user.email, subject, body)
   end
   
   def send_new_password_email(user)
     contest_name = Configuration['contest.name']
     admin_email = Configuration['system.admin_email']
-    mail = TMail::Mail.new
-    mail.to = user.email
-    mail.from = Configuration['system.online_registration.from']
-    mail.subject = "[#{contest_name}] Password recovery"
-    mail.body = t('registration.password_retrieval.email_body', {
-                    :full_name => user.full_name,
-                    :contest_name => contest_name,
-                    :login => user.login,
-                    :password => user.password,
-                    :admin_email => admin_email
-                  })
+    subject = "[#{contest_name}] Password recovery"
+    body = t('registration.password_retrieval.email_body', {
+               :full_name => user.full_name,
+               :contest_name => contest_name,
+               :login => user.login,
+               :password => user.password,
+               :admin_email => admin_email
+             })
 
-    logger.info mail.body
-
-    smtp_server = Configuration['system.online_registration.smtp']
-
-    begin
-      Net::SMTP.start(smtp_server) do |smtp|
-        smtp.send_message(mail.to_s, mail.from, mail.to)
-      end
-      result = true
-    rescue
-      result = false
-    end
-
-    return result
+    logger.info body
+    send_mail(user.email, subject, body)
   end
   
 end
diff --git a/app/views/user_admin/contest_management.html.haml b/app/views/user_admin/contest_management.html.haml
--- a/app/views/user_admin/contest_management.html.haml
+++ b/app/views/user_admin/contest_management.html.haml
@@ -5,13 +5,20 @@
   %br/
   = text_area_tag 'login_list', nil, :rows => 23, :cols => 80
   %br/
-  You want to
-  = select(nil,"operation",[['assign users to','assign'],['add users to','add'],['remove users from','remove']])
-  contest
-  = select("contest","id",Contest.all.collect {|c| [c.title, c.id]})
-  = check_box_tag 'reset_timer'
-  Auto-reset current contest timer.
-  %br/
+  %table
+    %tr
+      %td{:valign => 'top'}
+        You want to
+        = select(nil,"operation",[['assign users to','assign'],['add users to','add'],['remove users from','remove']])
+        contest
+        = select("contest","id",Contest.all.collect {|c| [c.title, c.id]})
+        and also
+      %td
+        = check_box_tag 'reset_timer'
+        Auto-reset current contest timer.
+        %br/
+        = check_box_tag 'notification_emails'
+        Send notification email(s).
 
   = submit_tag "Perform action!", :confirm => 'Are you sure?'
 
diff --git a/config/locales/en.yml b/config/locales/en.yml
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -119,6 +119,18 @@
 
 Thanks!"
  
+  contest:
+    notification:
+      email_subject: "[{{contest_title_name}}] You have been upgraded to {{contest_name}}"
+      email_body: "Congratulations {{full_name}},
+
+You have advanced to contest {{contest_name}} in {{contest_title_name}}.
+
+You can now log-in and start participating in that contest.
+
+Cheers!
+-{{contest_title_name}} Admin"
+
   help:
     how_to_submit: "How to submit"
     must_specify_language: "You <b>must</b> specify the language you are using in your program header.  You can optionally specify the task you are submitting to."
diff --git a/config/locales/th.yml b/config/locales/th.yml
--- a/config/locales/th.yml
+++ b/config/locales/th.yml
@@ -78,8 +78,8 @@
 
 เพื่อเปิดใช้งานบัญชีของคุณ
 
-ถ้าคุณไม่ใช้คนที่ลงทะเบียน กรุณาละทิ้ง e-mail ฉบับนี้
-และแจ้งความผิดพลาดนี้กับ {{admin_email}}
+ถ้าคุณไม่ใช่คนที่ลงทะเบียน กรุณาละทิ้ง e-mail ฉบับนี้
+และแจ้งความผิดพลาดนี้กับ {{admin_email}} ด้วย
 
 ขอบคุณมาก!"
 
@@ -114,9 +114,21 @@
 รหัสผ่านคือ: {{password}}
 
 ถ้าคุณไม่ได้ขอรหัสผ่านใหม่ หรือไม่ใช่คนที่ลงทะเบียน กรุณาละทิ้ง e-mail ฉบับนี้
-และแจ้งความผิดพลาดนี้กับ {{admin_email}}
+และแจ้งความผิดพลาดนี้กับ {{admin_email}} ด้วย
 
 ขอบคุณมาก!"
+
+  contest:
+    notification:
+      email_subject: "[{{contest_title_name}}] คุณได้รับการเลื่อนขั้นสู่ระดับ {{contest_name}}"
+      email_body: "ขอแสดงความยินดีด้วย คุณ{{full_name}}
+
+คุณได้รับการเลื่อนขั้นให้สามารถแข่งขันในการแข่งขันระดับ {{contest_name}} ของ {{contest_title_name}} แล้ว
+
+คุณสามารถเข้าสู่ระบบเพื่อทำโจทย์ได้ทันที คุณสามารถแข่งในระดับ {{contest_name}} ได้จนกระทั่งการแข่งขันรอบนี้สิ้นสุดลง
+
+-ทีมงาน {{contest_title_name}}"
+
       
   help:
     how_to_submit: "วิธีการส่งโปรแกรม"
diff --git a/lib/mail_helper_methods.rb b/lib/mail_helper_methods.rb
new file mode 100644
--- /dev/null
+++ b/lib/mail_helper_methods.rb
@@ -0,0 +1,36 @@
+module MailHelperMethods
+
+  def send_mail(to, subject, body)
+    mail = TMail::Mail.new
+    mail.to = to
+    mail.from = Configuration['system.online_registration.from']
+    mail.subject = subject
+    mail.body = body
+
+    smtp_server = Configuration['system.online_registration.smtp']
+
+    if ['fake', 'debug'].include? smtp_server
+      puts "-------------------------
+To: #{mail.to}
+From: #{mail.from}
+Subject: #{mail.subject}
+#{mail.body}
+--------------------------
+"
+      return true
+    end
+
+    begin
+      Net::SMTP.start(smtp_server) do |smtp|
+        smtp.send_message(mail.to_s, mail.from, mail.to)
+      end
+      result = true
+    rescue
+      result = false
+    end
+
+    result
+  end
+
+end
+
diff --git a/spec/integration/contest_managements_spec.rb b/spec/integration/contest_managements_spec.rb
--- a/spec/integration/contest_managements_spec.rb
+++ b/spec/integration/contest_managements_spec.rb
@@ -22,51 +22,70 @@
   end
 
   it "should reset users' timer when their contests change" do
-    james_session = open_session
-    james_session.extend(MainSessionMethods)
+    session = open_session
+    session.extend(MainSessionMethods)
 
-    james_login_and_get_main_list(james_session)
-    james_session.response.should_not have_text(/OVER/)
+    james_login_and_get_main_list(session)
+    session.response.should_not have_text(/OVER/)
 
     Delorean.time_travel_to(190.minutes.since) do
-      james_session.get_main_list
-      james_session.response.should have_text(/OVER/)
+      session.get_main_list
+      session.response.should have_text(/OVER/)
 
-      james_session.get '/'                   # logout
-      james_session.get '/main/list'          # clearly log out
-      james_session.response.should_not render_template 'main/list'
+      session.get '/'                   # logout
+      session.get '/main/list'          # clearly log out
+      session.response.should_not render_template 'main/list'
 
       admin_change_users_contest_to("james", @contest_b, true)
 
-      james_login_and_get_main_list(james_session)
-      james_session.response.should_not have_text(/OVER/)
+      james_login_and_get_main_list(session)
+      session.response.should_not have_text(/OVER/)
     end
   end
 
   it "should force users to log out when their contests change" do
-    james_session = open_session
-    james_session.extend(MainSessionMethods)
+    session = open_session
+    session.extend(MainSessionMethods)
 
-    james_login_and_get_main_list(james_session)
-    james_session.response.should_not have_text(/OVER/)
+    james_login_and_get_main_list(session)
+    session.response.should_not have_text(/OVER/)
 
     Delorean.time_travel_to(190.minutes.since) do
-      james_session.get_main_list
-      james_session.response.should have_text(/OVER/)
+      session.get_main_list
+      session.response.should have_text(/OVER/)
 
       admin_change_users_contest_to("james", @contest_b, true)
 
-      james_session.get '/main/list'
-      james_session.response.should_not render_template 'main/list'
-      james_session.should be_redirect
+      session.get '/main/list'
+      session.response.should_not render_template 'main/list'
+      session.should be_redirect
 
       Delorean.time_travel_to(200.minutes.since) do
-        james_login_and_get_main_list(james_session)
-        james_session.response.should_not have_text(/OVER/)
+        james_login_and_get_main_list(session)
+        session.response.should_not have_text(/OVER/)
       end
     end
   end
 
+  it "should maintain admin logged-in sessions even when their contests change" do
+    session = open_session
+    session.extend(MainSessionMethods)
+
+    session.login('mary', 'goodbye')
+    session.get_main_list
+    session.response.should_not have_text(/OVER/)
+
+    Delorean.time_travel_to(190.minutes.since) do
+      session.get_main_list
+      session.response.should have_text(/OVER/)
+
+      admin_change_users_contest_to("mary", @contest_b, true)
+
+      session.get '/main/list'
+      session.response.should render_template 'main/list'
+    end
+  end
+
   private
 
   module MainSessionMethods