It's not a good idea to ride for an hour and a half while perspiring, then work 8-9 hours, and ride home again while wearing the same shorts. Try changing out of the bike shorts, rinsing them out at the beginning of the shift and airing them out to dry. You'll be a lot healthier. You can carry regular underwear with your gear.

Why not wear regular cycling shorts, the kind sold at any sporting goods store or bike specialty shop? BTW, they're worn commando style, if you get my drift. Make sure to wash and towel off upon arriving at work. Healthier for your skin and better for your coworkers.