Director of Teligent: 2014 - Present
Mr. Koehler retired from Merck & Co in September of 2011, where he served as Vice President, Schering-Plough Controller and Special Projects. Prior to this role, Mr. Koehler served as the Vice President, Corporate Controller of Schering-Plough Corporation, where he also served as Chief Accounting Officer and was directly responsible for accounting and internal control matters worldwide. Before joining Schering-Plough Corporation, he served in several capacities at The Medicines Company, including SVP and Chief Financial Officer. Prior to The Medicines Company, Mr. Koehler served in various executive and senior level positions at Vion Pharmaceuticals, Inc., Knoll Pharmaceuticals, Inc., a wholly owned subsidiary of BASF Corporation, Boots Pharmaceuticals, Inc. and American Hospital Supply Corporation, and then with Baxter International after a merger in 1985. Mr. Koehler began his career at Arthur Andersen in Chicago, holds a B.A. from Duke University, and an MBA degree from the Kellogg Graduate School of Management at Northwestern University. He is also a Certified Public Accountant.