SCP.

Class A: Class A personnel are considered essential to the Foundation's strategic operations and are not permitted direct access to anomalies under any circumstances. When the situation necessitates physical proximity between Class A personnel and such anomalies (such as in facilities housing containment units), Class A personnel will not be permitted access to those areas of the facility containing such anomalies and will remain in secure areas at all times. In the event of an emergency, Class A personnel will be immediately evacuated to a secure location outside the facility. Members of the O5 Council (Overseers) enjoy permanent Class A status.

Class B personnel are considered essential to local Foundation operations and may only access objects, entities, and anomalies that have undergone proper quarantine and lack mind-altering capabilities or memetic agents. In the event of a containment breach or hostile action against a Foundation facility, Class B personnel will be evacuated to a secure location off-site as soon as possible.

Class C personnel have direct access to most anomalies that are not strictly hostile or dangerous. Class C personnel who have had direct contact with potentially mind-altering or memetic properties will be quarantined and undergo psychiatric evaluation as deemed necessary by security personnel. In the event of a containment breach or hostile action against a Foundation facility, non-combatant Class C personnel will proceed to secure, sealed areas or be evacuated if so determined by security personnel in the event of a site-wide containment breach or other catastrophic event.

Class D personnel are expendable personnel employed to handle extremely dangerous anomalies and are not permitted any contact with Class A or Class B personnel. Class D personnel are typically recruited from prison inmates around the world who are accused of violent crimes, especially those facing the death penalty. In particularly trying times, Protocol 12 may be instituted, allowing the use of other sources of personnel (political prisoners, refugee populations, other civilian sources) for Class D recruitment by transferring them to Foundation custody under circumstances allowing plausible deniability responses. Class D personnel will undergo regular psychiatric evaluations, and will be administered a Class B or higher amnestic or terminated at the end of a one-month tour of duty under the responsibility of the facility's medical or security staff. In the event of a catastrophic event affecting the facility, Class D personnel will be immediately removed unless the facility's security personnel deem it appropriate not to do so.

Class E is a provisional classification applicable only to field agents and containment personnel who have been exposed to potentially harmful effects in the course of initial acquisition and containment of new anomalous objects, entities, or phenomena. Class E personnel will be quarantined, monitored, and screened for potentially harmful behavioral, personality, or physiological changes as soon as possible, and will only be allowed to return to active duty after reporting to and receiving clearance from psychiatric and medical personnel.

Containment Specialists have two general roles at Foundation facilities. First, containment teams are called in response to confirmed cases of anomalous activity to secure and establish initial containment of anomalous objects, entities, or phenomena and transport them to the nearest Foundation Containment Site.

In addition, the Foundation's engineers and technicians are called upon to conceive, refine, and maintain containment plans and units dedicated to objects, entities, and phenomena at Foundation facilities.

Security officers, often referred to simply as "Guards," are stationed at Foundation facilities and are responsible for maintaining the physical and information security of Foundation projects, operations, and personnel. Recruited primarily from militaries, law enforcement, and prison personnel, these officers are trained in the use of all types of weapons and various contingency plans covering both security breaches and external hostile actions. They are also responsible for data security, ensuring that sensitive documents are not misplaced and that a facility's computer systems are protected from external intrusions. They are also typically the first line of defense at Foundation facilities against external attackers.

Response Teams—or Tactical Teams—are highly trained and heavily armed teams tasked with escorting containment teams when dangerous anomalous entities or hostile Groups of Interest are involved, and with defending Foundation facilities against hostile actions. In practice, response teams are military units stationed at critical Foundation facilities, kept on standby for deployment at a moment's notice.

Field Agents are the eyes and ears of the Foundation, trained personnel to seek out and investigate signs of anomalous activity, and often embedded within law enforcement agencies or local or regional services such as emergency medical services or the legislature. As covert units, Field Agents typically do not carry equipment that would allow them to deal with unconfirmed cases of anomalous activity; once such an anomaly is confirmed and isolated, Field Agents will call for assistance from the nearest containment team with the means to secure and contain it.

Mobile Task Forces are specialist units made up of veteran field personnel recruited from across the Foundation. Mobile Task Forces are activated to deal with threats of a specific nature, and include personnel of all types, from field researchers specializing in a particular type of anomaly to combat units tasked with securing certain types of hostile anomalous entities. For more information, please refer to the Mobile Task Forces document for more detailed information.

The Site Directors of the Foundation's most important facilities are the highest-ranking staff members present at these locations, and are responsible for the continued and secure operation of their Site and all contained anomalies and projects carried out there. All Department Directors report directly to the Site Director, who in turn reports to the O5 (Oversight) Council.

The O5 Council designation refers to the committee comprised of the Foundation's highest-ranking directors. With full access to all information relating to contained anomalies, the O5 Council oversees all Foundation operations worldwide and directs its long-term strategic planning. Due to the confidentiality of their positions, O5 Council members are not to come into direct contact with any anomalous objects, entities, or phenomena. Furthermore, the identities of all O5 Council members are secret. References to Council members are limited to their numerical designations (O5-1 through O5-13).