Wood Group Kenny appointed Bob MacDonald as CEO, effective April 6.

McNichol succeeds Steve Knowles, who will retire from Wood Group on April 1.

Ian Wood, author of a state-ordered report into the needs of the business, warned that about 15,000 positions relying on the industry could vanish in a few months.

Reese was a former National Oilwell Varco (NOV) executive, who spent more than 30 years at the company before retiring.

Larson, 48, has been with the Houston-based company since May 2012.

Steven Newman has agreed to step down as president and CEO of Transocean Ltd., effective Feb. 16, the company said in a news release.  Ian Strachan, chairman of Transocean’s board, will also serve the company in the role of interim CEO.

Specialists are determining whether conditions are safe enough to allow search and rescue efforts to continue.

TAG Oil Ltd. (TSX: TAO) CEO and director Garth Johnson and COO Drew Cadenhead have submitted their resignations, the company said in a news release.

On Feb. 12, the company said that five of the 74 people onboard the Cidade de São Mateus  died, and that four are still missing.

Scott Myers and Edward Wharam joined as managers for the Middle East and Indonesia and Malaysia, respectively.

The drilling company expects to reduce its workforce by 6.5% to 8%, according to an e-mailed statement.

Aldemir Bendine has been named as CEO of Petrobras after a vote Feb. 6 by the company’s board of directors, according to a news release.