Roy F. Weston Inc., West Chester, Pa., has named Elliot Newman manager of the company's pacific re-gion.... Frank E. Verrier has been named vice president of Kennedy/ Jenks Consultants, San Francisco.... Alexander W. Rangos has been promoted to president and chief operating officer of Chambers Development Co., Pittsburgh.... HDR Engineering, Omaha, Neb., has promoted John F. Williams to senior vice president and Stuart H. Russell to vice president.... Harrie Valec has been appointed national sales manager of North American operations for Telma Retarder Inc., Hayward, Calif.... Philip A. Haderer has joined Frederic R. Harris Inc., New York, as vice president and director of environmental management programs in the Iselin, N.J., office.... Donald W. Polly has been named vice president of technical services at Skelly and Loy Inc., Harrisburg, Pa.... Camp Dresser & McKee, Cambridge, Mass., has promoted Richard A. Molongoski to principal of the firm.... Wayne Trewhitt has been appointed to the board of directors of John Sexton Contractors Co., Hillside, Ill.... Wheelabrator Clean Air Sys-tems Inc., Schaumburg, Ill., has named Felix D'Avanzo and Rodney Pennington as regional sales and marketing managers. The company also has appointed David McHugh as national customer service director.... Post, Buckley, Schuh and Jernigan Inc., Miami, has promoted Edward C. Jensen to executive vice president and director of operations and relocated him to Irvine, Calif..... Applied Science & Technology Inc., Ann Arbor, Mich., has named Robert F. Wally as director of RCRA Corrective Action Programs and Susan Knight as director of the Industrial Compli-ance Groups.... Joeseph Luna has been named director of sales and marketing of Akzo Industrial Systems Co., Ashville, N.C.... The Maryland Department of the Environment, Baltimore, has named John K. Chlada as director of the Office of Strategic Planning and Policy Coordination and Viola O. Lewis as the director of the Office of Community Assistance.... Robert A. Lombard has been appointed vice president of business development for Parsons Environmental Services Corp., Pasadena, Calif.... Judi Mc-Inerney has joined NTH Consultants Limited, Farmington Hills, Mich., as a health and safety manager.