Summit Midstream Partners LP (NYSE: SMLP) promoted Marc Stratton to serve as its next CFO after the midstream operator said Dec. 10 its previous top finance exec, Matthew Harrison, is leaving the company to pursue other interests.

Harrison has been with the Summit family companies since 2011. His employment with the Woodlands, Texas-based company will terminate effective Jan. 4. At which time, Harrison’s successor, Stratton, will take over as executive vice president and CFO.

Stratton, who joined Summit Investments as a founding member in 2009, has held various senior management roles at the Summit family companies including as senior vice president of finance, treasurer and head of investor relations.

Steve Newby, president and CEO of Summit Midstream, said in a statement: “Marc has been an instrumental member of Summit's senior management team since its inception in 2009. He is a dynamic leader and a thoughtful executive and he has been directly involved in the development, financing and strategic growth of Summit since our founding.”

As a result of Stratton’s appointment, Summit Midstream also promoted Blake Motley, currently director of strategy, to vice president of strategy and head of investor relations, and William (Bill) Mault, currently director of finance, to vice president of finance and treasurer. These appointments will take effect immediately.