Silberline Manufacturing Co., Inc. has promoted Steven R. Gingras to the position of managing director – North America. Mr. Gingras is a five-year veteran of the firm, most recently holding the position of vice president of operations. In his new role, Mr. Gingras will have responsibility for achieving the business objectives and leading all aspects of Silberline’s North American business.      Mr. Gingras is a graduate of Cornell University, where he received a bachelor’s degree in chemical eng...