A System Agent is an individual who works, with more or less clarity, to maintain and reproduce The System.
The Lightning Path identifies three types of System Agents:
System Agents have two basic functions, implantation of Archetypes (read indoctrination) and enforcement of compliance. System Agents implant into Individual Consciousness and Collective Consciousness archetypes and designed to steer behavior and block Consciousness from descending into The Vessel (i.e. The Physical Unit.) System Agents also enforce the norms, values, roles, and expectations required to maintain and reproduce The System
Sharp, Michael (RSGDISC). The Rocket Scientists' Guide to Spiritual Discernment Lightning Path Press. 
Sosteric, Mike (2019). Triumph of Spirit Book Two: New and Old Energy Archetypes