Formal suits that consist of jacket, skirt and pants are a must. Have a light colored one for summer and a dark one for winter. Also choose a neutral colored cardigan and an appropriate blazer. Get a couple of basic skirts. Choose straight or flared ones, whichever suits your figure. One pinstriped blouse and two plain shirts should suffice for starters. Get yourself one classic dress and change the look with different accessories for different occasions. Scarves, belts and jewelry can make a dress look quite different. An all weather coat will also come in handy.
Suits are a must in an office environment. Invest in year-round ones. Get yourself a couple of solid color jackets or blazers that can be teamed up with most of your trousers. Choose medium to dark colors for trousers in durable fabrics. Shirts can be light, pin striped or good old white. A few fashionable shirts can be included for the entertainment scene in the office. A couple of good quality belts in sober colors are a must. It would be a good idea to have both lace-up shoes and slip-on ones in black and brown. Lace in for formal wear and slip-ons for casual wear. Wearing well worn shoes is just not done. Accessories like fine leather briefcases do add personality.