O'Brien Commercial Properties, Inc. has promoted Paul Mulroy to vice president. Mulroy has worked as a senior associate developing the Rte. 3 and Rte. 495 submarket for O'Brien Commercial Properties. Graduating from Gordon College with a degree in Business Administration, Mulroy has worked in sales and construction management before joining O'Brien Commercial Properties and now specializes in the sales of office and industrial sectors, and leasing assignments.