Mars City Security

Mars City Security, also shortened to Mars-Sec, is, as the name suggests, the regular security guard unit of Mars City and the adjoining UAC facilities. It is never specifically stated whether Mars-Sec are marines or civilian security guards. In any case, the Mars Sec, like the marines, fall under the authority of Master Sergeant Thomas Kelly. While the Mars Sec seem to share many duties with the marines, it appears that the Mars-Sec serve as the day-to-day regular UAC Security Guard force. Marines on the other hand are tasked with guarding special areas around the base such as Marine Command, as well as accompanying science teams being sent through the Portal.

Some of the Mars-Secs and marines wondered why the Mars facility needed the defensive and security equipment it had. During the demonic invasion, almost all of Mars-Sec was possessed, being turned into Z-Secs (Zombie-Security).

Known Mars City security personnel

 * Michael Abrams
 * T. Brooks
 * R. Cooper
 * Karl Cullen
 * Bruce Jackson
 * Mark Ryan
 * J. Yezback

Equipment
A typical Mars-Sec wears a helmet with combat visor, goggles, or use a sealed helmet for outside operations and transit. Unlike the marines who wear brownish-green armor, the Mars-Sec wear black armor. The Mars-Security unit typically is issued standard weapons like Pistols and Shotguns for their duties. Security guards are also issued PDAs, and use equipment like Sentry Bots, specialized tablet-type PDAs, security keycards, and other gear. They also work with and use standard-issue marine weapons and equipment such as the Enforcer Machine Gun. Some can be equipped with protective Riot Shields.