Greetings!!!
Very Expert in joomla and as per requirements I can upgrade your joomla and can take care other extensions.
Our development team consists of experts in PHP, .Net, Java, Wordpress, Android, iOS, BlackBerry, Windows Phone, Phone Gap, jquery, Drupal, Joomla, Magento, MS SQL, MySQL, etc. and mainly work for international clients.
We can also show references and case studies of our work for your betterment
Warm regards,
Marry K