William J. Conroy has been appointed vice president of operations and engineering at Microfluidics, a wholly owned subsidiary of MFIC Corp. In this position, Mr. Conroy will have P/L responsibility for the operating division of both Microfluidics and MFIC, including product design and engineering, production and purchasing. Mr. Conroy will also assume responsibility for overall systems quality and reliability, and will report directly to Michael C. Ferrara, chief executive officer.     Mr. Co...