When I was Chief Pilot for a Part 135 Commuter Airline, flight crews were required to wear the standard white shirts, ties and epaulettes. Today, my corporate job is at an agribusiness company, and the dress code is much more relaxed. There are times where I will go tramping out in the lettuce fields with the boss, so my standard uniform is Blue Jeans, sneakers, and either a button down or a polo shirt with the company logo on it. I wish I could get away with shorts, as it does get very hot around here in July, but it wouldn't look professional in the boss' eye.