Antonia van Maanen Sawalha was a Starfleet engineer on active duty in at least the 23rd century. Sawalha was born on June 6, 2259, somewhere in the European Hegemony. (It was never explained why she always told people she was born in London, despite no evidence to support this.) Seven years later, she was nearly assigned as a warp specialist to Operation Blackjack but contracted Vegan choriomeningitis and was sidelined for many months. (Star Trek: Shadowstar: Operation Blackjack)