Matra Petroleum plc appointed Sir Michael Jenkins non-executive chairman.

RGB appointed Tadj Slattery as its new chief operating officer.

The board of directors at Noble Corp. said Mark A. Jackson has resigned from the positions of chairman of the board, president and chief executive officer, effective immediately.

Michael Silverman has been promoted to executive vice president and chief technology officer of Ivanhoe Energy.

GeoMechanics International Inc. announces the promotion of Peter O’Conor (left) to vice president, global sales.
EMGS named Roar Bekker chief operating officer.

Monica Danna has been named director of marketing for Knowledge Systems.

Kristy Blosch (right) has been named the public relations account executive for Foster Marketing Communications.

Hardide Coatings Inc. appointed Ken Siddall as managing director of its tungsten carbide-based coatings manufacturing facility in Houston.

Aberdeen-based Rotech Subsea has promoted general manager Richard Beattie to operations director of the company.