Robert Mars was a Starfleet security guard serving in the late 24th century.

By 2381, Mars was assigned to the USS Enterprise-E. After the Enterprise and the USS Aventine traversed a subspace tunnel from the Azure Nebula ending up near the Carina Arm near the meridian of the Gamma and Delta Quadrants, they were attacked and boarded by a group of Hirogen. Mars was one of the ten security officers assigned to protect the Bridge and Captain Jean-Luc Picard, but the Captain refused to leave; second officer Miranda Kadohata ordered Mars, Austin Braddock, and Cruzen to surrender their TR-116 rifles and depart the Bridge. (ST - Destiny novel: Mere Mortals)

USS Enterprise (NCC-1701-E) security & tactical personnel
	Chiefs: L. Addison • P. Daniels • Rowan • R. McAdams • B. Leyoro • C. Vale • S. Nave • L. Battaglia • Z. Leybenzon • J. Choudhury
	Aiken • J. Allen • Almonte • A. Balidemaj • A. Braddock • Brennan • G. Carmona • Carr • A. Chang • Chell • N. th'Chun • Clemens • Cobbins • Craycroft • K. Cruzen • P. Davila • H. de Lange • Dey • R. Duncan • S. Fillion • Floyd • R. Giudice • J. Gonzales • T. Gracin • E. Grigsby • Jarata B. • Korban • J. Jurot • Kelly • ch'Kerrosoth • E. Laird • Lightner • Le Roy • J. Lofgrin • Lopex • Liryn • F. McEwan • R. Mars • Melo • A. Munro • T. Murphy • Obarakeh • Parminder • J. Peart • Razka • B. Regnis • Sanders • N. Sirhc • A. Šmrhová • S. Stockman • N. Stolovitsky • J. Struhlem • K. Thompson • J. Travis • T'Sona • M. Vogel • F. Wriede
see also: Senior staff • Engineering • Flight Control • Medical and Counseling • Operations • Science • Security • Misc. • Unnamed