Get to work. Remove bike and lock it to a bike rack using legit U locks. Remove from rack when you leave. Place back on car. Done.

Slight upgrade to the above

Buy a couple of extra locks, bring them to work or near work. Lock all of them to a strong post. Keep lock keys in car. When you arrive at work simply lock bike up with locks which are already there waiting and after work, take bike (and keys) home by car.