By OGJ editors
HOUSTON, June 2 -- Steven B. Hinchman has assumed duties as executive vice-president and chief operating officer of Callon Petroleum Co., Natchez, Miss.
Hinchman served as executive vice-president of technology and services at Marathon Oil Corp., a position he held since April 2008. He joined Marathon in 1980 as a field engineer and had been a member of its executive committee since October 2000.
Callon operates in the Gulf of Mexico.