i used to have a job where i had to wear suits every day, and i traveled a LOT (taxis, trains, airports, different climates, fancy places, and developing countries). here are my tips:
1 - have enough suits so that you don't wear the same one in a 1-week work cycle.
2 - synthetic blend fabrics (e.g. polyester, lycra blends) stand up to travel better than 100% natural fibres, are more durable, are easier to clean with a damp wash cloth, and they trap the heat of your body, keeping warmer (great in cool climates, but make you sweat more in warm climates). steaming them without cleaning them is often enough.
3 - 100% natural fibres (e.g. cotton, linen, wool) look best when they are fine fibres, high twill/twist, they breathe better than synthetic fibres and can be cooler to wear, but they wrinkled or get pulled out of shape very easily in a normal day's wear, on trains/planes/automobiles, and they absorb dirt and odour and hence may need cleaning more often. these can be steamed to get the wrinkles out, but need to be professionally cleaned more often than the blended fabrics
4 - pay attention to the cut of the trousers and the fit, especially if you are in a job that requires you to drive all day. often times the focus is on the jacket, which is the more stylish part of the suit (its lapels, top stitching, vents, buttons, etc.) but remember that while you're working, you can't take your pants off as easily as your jacket ;^) ... also, getting in and out of cars stresses the seams of the trousers and if they are too tight, you can easily split the crotch or rear end.
5 - have at least double the number of shirts/ties as you have suits, so you can switch them around for a different look. depending on how sweaty or dirty your job is, or if you work long hours, you may need to change shirts during a day.
congrats on the job!