Midstates Petroleum Co. Inc. (NYSE: MPO) said Dec. 10 that Mark E. Eck will resign from his position of executive vice president and COO.

Eck's resignation, effective Jan. 4, is in order to pursue other opportunities, according to the release.

Following his departure, Eck's duties and responsibilities will be assumed by other members of the Tulsa, Okla.-based management team.

"Mark was a key member of the management team whose 2015 successes included a significant corporate debt restructuring, building a strong team as part of the transition of our corporate offices from Houston, Texas to Tulsa, Oklahoma, and helping to effectively manage the Company’s assets in a volatile commodity price environment," said Jake Brace, president and CEO, in a statement.