Chicken breast cut in chunks with tons of raw broc or spinach
Tuna is very convenient
beef or turkey patties
Those are my work staples.
I also have a shake mixer at work for the shakes.
Also, if you have your own work area, like a desk, you can keep certain things there, like olive oil, multi vits, walnuts/almonds/peanuts, protein powder, etc... That way you don't have to pack and carry so much stuff everyday.