Make sure you are not letting your washed uniforms/underwear just sit in the washer until you get around to drying them. They will sour quickly in the washer especially in the summer months. Good antiperspirant like the new stuff from Old Spice (Red Zone). Wear an undershirt! Yes, even in the summer wear an A Shirt (aka.wife beater).
If you get chaffed up between the legs get you some Desitin diaper rash ointment and use it at night after showering. That stuff gets the chaffing gone quick. Carry some of the flushable
wipes with you during the day if you need to go on the road. If you're really not sure, then ask a close friend if you stink - it may be just your paranoia. Sweaty, salty old man smell is natural at the end of a hot long day. Make sure you don't smell in the mornings. Smelling like garbage or rotten vegetables needs your attention and may need help from a doctor. Have you checked your diet? Changed how you eat? Your screen name - Margaritaville? Drink a lot of alcohol? I'm not dogging ya . Just suggestions of the cause.