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Check out the latest new hires, promotions and appointments in the oil and gas industry. 

Marathon Oil has appointed Lee Tillman, who will also continue to serve as president and CEO, to succeed Dennis Reilley as the U.S. shale producer’s new chairman

Libya's biggest oilfield, El Sharara, will remain shut until an armed group occupying the site leaves, the head of National Oil Corp (NOC) said on Jan. 29, more than a month after the field closed because of a protest.

Paul D. McKinney succeeds William M. Griffin, who took over as SandRidge Energy’s president and CEO last year after James Bennett was ousted in a victory for activist investor Carl Icahn.

Patrick de la Chevardière has been Total CFO for the last 11 years and is reported to be succeeded by Jean-Pierre Sbraire, currently deputy CFO of the French oil and gas major.

Neptune Energy has on Jan. 23 appointed Kaveh Pourteymour as CIO, based in London. He will take up the new role in the first half of 2019.

As a result, the company’s former CFO, Alexander Krane, is set to move to a position as investment director at Aker ASA, a Norwegian holding company that holds a 40% stake in Aker BP.

Shell Upstream Director Andy Brown is stepping down after 35 years at the Anglo-Dutch company. His replacement, Wael Sawan, currently heads Shell's deepwater operations.

Mark Richard has been promoted as Halliburton’s new president of the Western Hemisphere, replacing Jim Brown who is leaving after more than 20 years with the oilfield services company.

The new CEO of Brazil’s state-controlled oil company Petroleo Brasileiro SA (NYSE: PBR) is pushing for the ouster of two board members, newspaper Valor Economico reported on Jan. 11.

Seadrill Partners LLC (NYSE: SDLP) said Jan. 10 that its CEO and CFO, Mark Morris, will step down from his positions at the end of June, providing time for the company to find a suitable replacement.