JPL

JPL was responsible for constriction of many of the Ares Equipment pieces for surface operations. All Ares rovers were built and tested by JPL, as well as the MAV, MDV , Hermes Control module, communication systems, and internal HAB components. JPL was also responsible for maintaining contact with Mark Watney after he had retrieved Pathfinder, which was also built by JPL.

List of known employees:
Bruce Ng - The Director of JPL

Tim Grimes - Responsible for Pathfinder communications