Vale was 23 when she enlisted in the Academy (per A Time for War, a Time for Peace), which was in 2366 (per Security). That means she's 33 when we see her in The Belly of the Beast, and 37 in Titan.I know you said this a while back, but I can't remember, how old is Vale supposed to be?
We first meet Conlon as an engineer in Interphase Book 2, and she showed up again in Cold Fusion, Enigma Ship, and Wildfire -- in the latter she plays a semi-significant role. She's made chief engineer in Breakdowns, and she's appeared regularly since.I must admit I'm curious now to see who Conlon is, because I loved Jamie Ray Newman (Lt. Cadman) in the Stargate Atlantis where McKay was stuck in her body.