Betancourt was chief engineer of USS Avenger in the 2260s when that ship was commanded by Captain Melissa Sturdevant. She fine-tuned the emergency transporters to helped rescue survivors of the atttempted coup d'état of Yogyakarta Baru in 2265. (Star Trek: Avenger: Time, See What's Become of Me)
- Betancourt is mentioned, though not seen, in Star Trek: Avenger: "Reaching Taurus", set in 2268.
|Officers of the starships Avenger|
|NCC-1860:||Wesley | Sturdevant | Jellicho | Thalazar | Rosenzweig | Maldonado | Waidlich | Lynch||Michener | Sturdevant | Reichardt | Jellicho | Thalazar|
M. Cohen | Vosseller | Lane | Johnson | Maldonado | Se'ele | Uhma | Waidlich | T'HoD | Setak
|Shepherd | Buonocore | Dimick | R. Fillmore | Jennings | Gor | Waidlich||Newman | Bell | Graevyn | Meadows | Underwood | Milan | S'H'l | Van Houten||Devereaux | Lane|
R. Fillmore | DiMaio | Ciufo | Setak | Bolick
|M.-J. Betancourt | Thalazar|
N. Cook | Newcome | Shappe | Padovan | Zulkowski | Rielly
|Shepherd | Vosseller | Wiener]] | Anbinder | Klufas | Rhea | Kagan | T'HoD | Thompson||D. Paris | Roussell | McHenry | Johnson | S. Romano | rRham | Jennings | Gor | Sexton||T'Raav|
M. Cohen | J. Levy | DeMono | W. Fillmore | Urbanavage | Reilly | Arudis | Parker-McKenzie | Draxum
|NX-09 | NCC-D100 | NCC-1860 | NCC-69925 | NCC-75461|
The given name of the character was after that of a colleague of the author's, when he worked at a French bank in the 1980s.