Here we go. Though not entirely canon I presume since this info was pulled from Project Umbrella/Wikia, but it was in turn taken from a translated Japanese-only Resident Evil book:
"At some point, Valentine began a career in the U.S. Army and took part in a training program of the 1st Special Forces Operational Detachment-Delta (1st SFOD-D), more commonly known as "Delta Force"-- the primary counter-terrorist unit of the United States. The precise details of the program are unknown, and probably top-secret. Even when the program occurred is currently unknown, although she did receive several years worth of training and became an expert in EOD (Explosive Ordnance Disposal), making her an exceptional asset to any counter-terrorism unit. She was trained in the Special Operations Training Facility in Fort Bragg, North Carolina. Whilst there, she received training in marksmanship and the use of firearms, with her lock-picking skills being honed to the point where she can pick around 60 different types of locks. She received her training in demolitions and bomb disposal outside the facility at "Range 19 Alpha". At some point, she was acquainted with Forest Speyer."
The look from ORC has that look as well.
