Cisco routers, switches, firewalls, VPN, LAN, WAN, MAN, routing protocols (BGP, OSPF), enterprise level switching, load balancing (BigIP, 3DNS, Alteon), NMS, SNMP, protocol analysis, clustering technology, performance testing and optimization, IPS/IDS, SNORT, CheckPoint Firewalls, TCP/IP, packet dissection, traffic analysis, DoS detection and mitigation, firewalls, ACLs, network architecture, network reconnaissance, scripting (PERL, shell scripting, batch files), DNS, web programming, application architecture, and monitoring. Extremely proficient in all of the following operating systems: UNIX (especially Linux), NT, Windows 2000, CatOS, and Cisco IOS. 5 years experience as a Senior Network Engineer for Dell Inc. in the Internet Engineering, Penetration testing, vulnerability assessment, and Network Security Engnieering group. Another 7 years experience at various other companies in roles ranging from technical support to Network Engineer to Director of IT Operations.