Ensign Stefano was a Starfleet officer who served aboard the USS Enterprise-E in 2374 as an operations manager. (TNG - The Q Continuum novel: Q-Space)

USS Enterprise NCC-1701-E operations personnel
chief of operations	Data • M. Kadohata
other operations personnel	A. Berardi • S. Milner • Rosado
see also: Senior staff • Engineering • Flight Control • Medical and Counseling • Operations • Science • Security • Misc. • Unnamed