Lilker Associates, a New York City-based MEP and technology engineering firm, announced that Martin Bowen, P.E., has been promoted to principal and associate department head of the Electrical Department; Steven Hammer, P.E., has been promoted to principal; Morais Miranda, RCDD, was promoted from director to principal of the Technology Solutions Group (TSG); and David Tannenbaum has been promoted to senior associate and associate department head of the Mechanical Department.