Metrics Contract Services (Metrics), a division of Mayne Pharma, has appointed Troy Woelfel as Vice President of Operations and General Manager of Mayne Pharma Greenville Operations.    The company has also added more than 20 analytical chemists and formulation scientists to support the growing pipeline of committed business.     Mr. Woelfel will focus on further advancing the performance of the expanded Greenville operations following completion of the $80-million oral solid-dose commercial...