Murphy Company Mechanical Contractors and Engineers, St. Louis, has named Dave Hardin, P.E., chief operating officer. Senior vice presidents Larry Kruse and Mark Bengard have been given additional responsibilities. Kruse will continue his involvement with the industrial market in St. Louis and will assume corporate responsibility of the firm's Denver office. Bengard will oversee the firm's commercial and institutional markets in St. Louis, including design/build, construction operations, service, controls and Quick Response. Tim Pederson has been promoted to senior vice president of sales and estimating, and Patrick Murphy, Jr. to senior vice president of sales and marketing. Promoted to vice president were Tim Dace - heavy/industrial operations, Greg Hackl - industrial operations, and Tom Hegger -commercial/institutional operations. Albert Kahn Associates, Inc. Janice Deer-Tifrea has rejoined the Albert Kahn Associates, Inc. as a staff architect from St. John Health System, where she served as project manager. Her main responsibilities as staff architect in the commercial/institutional group include the development of working drawings and supporting the lead project architect.