Trevak

Commander Trevak is first officer of the Federation starship USS Remington. 

Early Life
Trevak was born on stardate 22849.7. (Star Trek: Remington: "Inceptum II")

Romulan Star Navy
Trevak enlisted in the Romulan Star Navy at a young age. He remained in the Navy until he gained the rank of Centurion, at which point he transferred to the Tal Shiar. (Star Trek: Remington: "Inceptum II")

Tal Shiar
As a Tal Shiar Major, he served admirably during the Dominion War. (Star Trek: Remington: "Inceptum II")

Exchange Officer
In 2381, he transferred back to the Star Navy at the rank of Subcommander and became a part of the Federation-Romulan Officer Exchange Program two years later. (Star Trek: Remington: "Inceptum II")

Background
Through the use of photomanipulation, Commander Trevak is "played" by Christian Bale.