ManTech International Corporation announced that it has named Stephen Deitz as Executive Vice President Deitz has held multiple leadership roles in his 10-year career at ManTech, supporting customers across ManTech's market sectors – Defense, Intelligence and Federal Civilian agencies. Most recently he served as ManTech Senior Vice President of Strategic Operations and Division Manager, Department of Justice, supporting customers in law enforcement agencies. Prior to joining ManTech in 2009, Deitz spent 10 years with CSC building and managing large service desk offerings for federal customers.