Security Specialist

A major corporation or organization uses a security specialist to protect their software and network security system.
Security Administrator

A security administrator is the someone who understands the entire system and keeps it functioning securely and optimally.
Vulnerability Assessor

Vulnerability Assessors may also be referred to as Vulnerability Assessment Analysts.

Cryptographer

Ciphers, algorithms and security systems are put into code by a Cryptographer. They also encipher and decipher code.
Chief Information Security Officer

A Chief Information Security Officer (CISO) is a security professional who has reached the pinnacle of the profession and administrates procedure.
Forensic Expert

Computer forensics experts are increasingly in demand by corporate and governmental bodies alike.