The Security Department collectively maintains the overall integrity of Foundation Sites and Areas, among other property. Their primary responsibility is to guarantee the safety of Foundation personnel and perform the day-by-day interactions with Class D personnel, as well as quell internal unrest and combat hostile incursion as the forefront of defense. Currently, a battalion-sized unit is stationed on-site.

The Combat Medics are a company-sized unit tasked with providing immediate life-saving medical assistance, fire support, and ordnance to combatant personnel. They're the Medical Department's most hardened practitioners of medicine, accepting the risk of giving their valuable lives in the line of duty.

The Specialized Control Unit is the staple of emergency combat services provided by the Foundation, ready at any moment to counter approaching threats. Typically, they're seen directing other Security personnel, handling light and moderate breaches, and intervening during times of unrest. Operators tend to have higher access due to the sensitivity of their missions.

The Tactical Protection Unit specializes in keeping the Foundation's upper echelons safe, and performing rescue & recovery operations. Guardsmen are selected from the Security Department's most dedicated and able-bodied personnel and are entrusted with higher access, able to go anywhere their VIP can.