I'm working in a top 1 outsourcing in Viet Nam, and work with PHP5 projects in 7 years.
In my company i working with many framework : Zend, CodeIgniter, Magento...
And work with big system for shipment : ezy2ship.com, https://www.clickandsend.com.au, ezyparcels.net, checkin.vn, mangdatphong.vn
And i'm a system administrator for checkin.vn and mangdatphong.vn base on CentOS 5.6
I have ZCE certificate with PHP5.5 (ZCPE) : http://www.zend.com/en/yellow-pages/ZEND026309