Robert C. Becker, president and CEO of Fitz Chem Corporation, recently announced that Don Deihs has been promoted to the position of senior vice president and chief operating officer. In this role, Mr. Deihs is responsible for managing all day-to-day activities at the company.      Mr. Deihs joined Fitz Chem two and a half years ago and has held the position of vice president of operations for the last two years. Prior to joining Fitz Chem, he had more than 20 years of experience in a variety...