Northern Oil and Gas, an exploration and production company, has appointed Richard Weber and Delos "Cy" Jamison to Northern Oil's board of directors, effective as of Aug. 30.

Weber and Jamison replace Ryan Gilbertson and Carter Stewart, who have resigned their board member positions in order for Northern Oil to add two new independent directors "to enhance the board's depth and provide a broader range of experience, independence and governance to Northern Oil's board," according to a company announcement. Gilbertson will continue to serve as Northern Oil's president with no change in his executive duties.

Weber currently serves as chairman and chief executive officer of PennEnergy Resources, a private equity backed independent oil and gas operator. Prior to co-founding PennEnergy in June 2011, Weber was president and chief operating officer of Atlas Energy and Atlas Energy Resources from 2006 until Atlas's sale to Chevron Corporation in 2011. Prior to joining Atlas, Weber spent 14 years at McDonald & Company Securities, subsequently acquired by KeyBanc Capital Markets, where he founded that firm's Energy Group, serving independent oil and gas producers, pipeline companies and utilities. Earlier in his career, Weber served as an associate at First Chicago Venture Capital, the predecessor of Madison Dearborn Partners and as a corporate banking officer at NBD Bancorp.

Jamison currently serves as the chairman and chief executive officer of the Jamison Group, which advises private landowners regarding large land exchanges with the United States Federal Government. Prior to founding the Jamison Group in 2009, Jamison served as a partner in the firm of Jamison and Sullivan from 1994 to 2009, a diversified consulting firm that specialized in advising start-up companies regarding business development matters.

Jamison was appointed by President George H. W. Bush, and served from 1989 to 1993 as the National Director of the Bureau of Land Management, Department of the Interior, Washington, D.C. In that position, Jamison oversaw approximately 600 million acres of subsurface mineral estate owned by the federal government. Earlier in his career, Jamison was a career employee of Bureau of Land Management.