S. M. (Steve) Cassiani, president, ExxonMobil Upstream Research Co., has elected to retire after more than 40 years of service.

Freddy Gebhardt (left) has been named president of Wild Well Control Inc.

Brinker Technology Ltd. has appointed Kevin Stewart as new group chief executive officer.

Superior Energy Services Inc. has named Patrick J. Campbell executive vice president.

Elizabeth R. Brumley has been appointed acting chief financial officer of Bristow Group Inc.

Lucas Energy Inc.’s board of directors has elected Don L. Sytsma to treasurer and chief financial officer of the corporation, and named Fred Hofheinz as chairman of the board.

Michel Hourcard has been appointed senior vice president development and operations techniques and senior vice president for the scientific and technical center of Total in Pau. He succeeds Jean-Marie Guillermou, who has been appointed senior vice-president Asia-Pacific, exploration & production for the company, replacing Charles Mattenet.

Fugro Gravity & Magnetic Services, the business development arm of Fugro Airborne Surveys and Fugro Ground Geophysics, has named Alessandro Colla (right) to its business development team.

Carlos Fernando Gonzalez Carrillo has joined TAM International as country manager of Mexico.

Geophysicist J. Pat Lindsey has joined Southwest Hydrocarbons Inc.’s board of advisors.