This is "Velocity Trap".
IMDB describes it thusly;
In a desolate and treachorous region of space known as the Velocity
Run, a heavily armored ship passes every six months. It carries
billions of Universal Dollars between the colonies and the Central
Bank on Earth. Hard currency has returned due to rampant electronic
crime. Now a team of highly trained mercenaries are about to commit
the perfect crime in a place where evidence and witnesses have no
chance of survival. In this deadly corridor of space, a single man
must stop them.
Ken Olandt plays "Nick Simmons", the Commander of the spaceship Endeavor.
There's a trailer below and you can watch the full movie online here