Marshall Shelby						
(210) 618-9233

520 John Carlyle Street
Alexandria, VA 22314	
[Send email using form at bottom]	
				
TECHNICAL SUMMARY:

•	Extensive configuration and maintenance of Cisco firewalls
•	Extensive configuration and troubleshooting of IPSec VPNs on Cisco firewalls
•	Limited configuration of Juniper/Netscreen firewalls
•	Limited configuration of Check Point firewalls

WORK EXPERIENCE:

Firewall Engineer
Rackspace Hosting				
February 2004 – Present 

Currently part of a team responsible for supporting the network secuirty of
thousands of customer web hosting environments spread across multiple datacenters
worldwide.  Current duties include:
•	Providing support of Cisco’s PIX and ASA firewalls in order to secure
customers’ environments;
•	Providing support of IPSec VPN solutions terminating on customers’ Cisco
PIX/ASA firewalls;
•	Providing limited support of Juniper/Netscreen firewalls;
•	Providing limited support of Check Point firewalls;
•	Providing support of Cisco’s Content Services Switch (CSS) and of CAI
Networks’ Webmux load-balancers in order to set up, maintain, and troubleshoot
customers’ content networking solutions;
•	Maintaining customers’ DNS zone files on Rackspace’s authoritative name
servers and troubleshooting DNS issues;
•	Provisioning, routing, and documenting the IP address allocations for
customers’ environments;

Data Center Technician 		
Rackspace Hosting				
February 2003 – January 2004

Built and maintained the hardware of servers in a multi-operating system managed
web hosting environment.  Duties included:
•	Building and repairing servers that ran the gamut of hardware specifications:

o	tower servers to 2U/4U rackmount servers
o	i386 (Intel/AMD) to SPARC processor architectures
o	non-RAID IDE configurations to SCSI RAID0/1/5/10 arrays
•	Installing and configuring the network settings of the following operating
systems:
o	Windows 2003 Server
o	Red Hat Enterprise Linux

IT Contractor					
Washington, D.C.			
August 2001 – January 2003

Provided LAN and Help Desk support to corporate clients in the Washington
metropolitan area:
•	Provided end-user technical support, including: resolution of
network/Internet/email connectivity issues; PC hardware
troubleshooting/upgrading; application troubleshooting (MS Office 2000, email
clients, anti-virus programs, etc.);
•	Handled routine network administration tasks: creating domain user/computer
accounts, email accounts, configuring PC domain and TCP/IP settings.

CERTIFICATIONS:

Cisco Certified Security Professional (CCSP), February 2008
Juniper Networks Certified Internet Associate (JNCIA-FWV), December 2008
Check Point Certified Security Administrator NGX R65 (CCSA), January 2009