Wood Group Mustang's Onshore Business Unit has appointed Charles Johnson to the position of general manager, Bakken region. He will oversee the growing Wood Group Mustang presence in the region from the company's regional in Minot, North Dakota.

Perry Englot, Peter Borsos, and Dennis DaSilva have been added to the Calgary-based Energy practice in Wells Fargo’s Corporate Banking Group.

L1 Energy has been established as the global oil and gas investment vehicle of Alfa Group, one of Russia's privately held investment companies.

Houston, TX-based Par Petroleum Corp. has made three key management appointments.

Maurice Eaton has left his position on the board of directors for Northern Petroleum Plc (AIM:NOP) and various other operating subsidiaries.

Dennis de Vreede will join DeepOcean Group Holding BV as its CFO on August 1, 2013.

Pardee Resources Co. (PRC) has named Thomas A. Lopus as senior vice president, oil and gas. Pardee Resources is a Philadelphia-based firm that focuses on the acquisition, management, and responsible development of natural resource properties.

Energy and power-focused private investment firm Riverstone Holdings LLC has added former Anadarko Petroleum Co. executive James T. Hackett to the firm as a partner and co-head of the Houston office.

Clarence P. Cazalot, Jr., chairman, president and CEO of Marathon Oil Corp. (NYSE: MRO) has elected to retire on Dec. 31, 2013, after almost 14 years leading Marathon Oil and 41 years in the oil and gas industry. Cazalot will continue as executive chairman through Dec. 31, 2013.