Tnemec Co. Inc. announced the appointment of Peter F. Cortelyou, a longtime executive and director of the company, as president and chief operating officer. Cortelyou was president of Tnemec, a Kansas City-based manufacturer of high-performance architectural and industrial-maintenance coatings, from 1986 through 1994, and has been a member of the company's board of directors since 1998. He originally joined the company in 1975 as controller and office manager, and later held the positions of vice president, Finance, and executive vice president. Separately, Tnemec announced the appointment of George Shannon as senior vice president, Business Development. Shannon, based in Pittsburgh, will assume oversight responsibilities for Tnemec's activities in the water-tank market and also will be responsible for other new business-development activities.