Evan was a lieutenant commander in Starfleet, who served as a beta shift bridge officer aboard the USS Enterprise-E in 2372. (TNG - Slings and Arrows eBook: That Sleep of Death)

USS Enterprise (NCC-1701-E) senior staff
commanding officers:	M. Bateson • J.L. Picard • W.T. Riker • Data	first officers:	W.T. Riker • Data • Worf	second officers:	G. Bush • Data • M. Kadohata • G. La Forge
watch officers	Evan • Heyes • Lynley • Havers	chief medical officers:	B. Crusher • Stevenson	ship's counselors:	D. Troi • T'Lana • Hegol D.
chief engineers:	M. Scott • G. La Forge	operations managers:	Data • M. Kadohata • R. Dygan	flight controllers:	S. Hawk • S. Nave • J. Faur
security chiefs:	L. Addison • P. Daniels • Rowan • B. Leyoro • R. McAdams • C. Vale • S. Nave • L. Battaglia • Z. Leybenzon • J. Choudhury • A. Šmrhová
see also: engineering personnel • medical & counseling personnel • operations personnel • pilots & flight control personnel • security & tactical personnel • sciences personnel • miscellaneous • unnamed