Experienced IT Infrastructure Engineer with 12 years experience working on servers and networks for small/medium size enterprises and within the NHS.Extensive work with Acitve Directory on Windows Server 2000, 2003 and 2008 including domain upgrades. Extensive knowledge on Citrix XenApp v3.0 - 5.0, Checkpoint NGX R60 - R70 Firewalls, Aruba Wireless LANs, HP Procurve Switches, Cisco Routers/Switches and Sonicwall Aventail SSL-VPNs.