His acting roles include appearances on such series as Twilight Zone, Homefront, Murder She Wrote, Quantum Leap, LA Law, Early Edition, Outer Limits, Crossing Jordan, Star Trek: The Next Generation among others.
As an actor, he is best known for his role as Starfleet Lieutenant Tom Paris, the ship's pilot on Star Trek: Voyager for it's entire seven year run.
Robert made his directorial debut on Star Trek:Voyager with a second season episode entitled "Sacred Ground". Since then, he has been directing nonstop. His directing credits include V, SAMANTHA WHO? (PILOT), LAS VEGAS, WHAT ABOUT BRIAN, DEAD LIKE ME, DESPERATE HOUSEWIVES, ONE TREE HILL, MEDIUM, MY BOYS, EVERWOOD, EYES, DAWSON'S CREEK, THE DAYS, SUMMERLAND and THE OC among many others.
In 2007, Robbie became the producing director on CHUCK, the critically acclaimed NBC comedy-adventure series about reluctant CIA agent Chuck Bartowski. Now an Executive Producer, he continues to direct multiple episodes and has directed over a quarter of all the episodes of CHUCK.