Take a thorough shower before leaving and don't put any deodorant on. Do not overdress.

After arriving at work:

Take your sweaty shirt off asap and wipe sweat off
Wash you hair in a sink
Wipe your armpits, and feet with WetOnes (and any areas where you sweat excessively)
Change all your clothes down to socks and shoes.
Put deodorant on.

If you still smell consider some antibacterial lotion such as hand sanitizer or antibiotic cream to apply after arriving at work and use merino wool clothing for riding.

The logic behind the above is that fresh sweat does not smell. What smells is bacteria that grows in your sweat later. So the idea is to start with a clean body before the ride and get rid of most the sweat asap before it dries off and becomes food for bacteria.

Other misc things that help to reduce your body odor:

Trim your body hair (armpits and pubic), don't shave, just cut short
Have a short haircut
Shower before going to bed AND in the morning

I sweat like there is no tomorrow, dripping, drenching sweat and I don't smell at work. I have actually asked my coworkers to let me know if it gets bad but they say it is never a problem.
Take it easy to lower sweating during the ride