Waste Management, the $13.3 billion Houston waste disposal company, named James Fish Jr. CFO and executive vice president. He succeeds Steven Preston, who is leaving to pursue CEO opportunities. Fish, 49, joined Waste Management in 2001 and most recently served as senior vice president of the company's Eastern Group. After beginning his career at KPMG Peat Marwick, he worked in finance and revenue management positions at Westex, Trans World Airlines and America West Airlines.

Ryerson, the $4.2 billion Chicago metal processor and distributor, appointed Edward Lehner CFO and executive vice president. He succeeds William Johnson, 55, who has been Ryerson's interim CFO since April. Lehner, 46, joins the company after serving as CFO at PSC Metals. Earlier, he worked at Deloitte Touche Tohmatsu, Nucor and Birmingham Steel.

Men's Wearhouse, a $2.3 billion retailer of men's clothing, named Diana Wilson interim CFO. Wilson, 64, replaces Neill Davis, who is leaving the Houston-based company to become president of Francesca's Holdings, a retailer of women's clothing. Wilson previously served as the company's chief accounting officer, after joining the company as corporate controller in 1999.