Jay Bhattacherjee has stepped down as chief executive of Aminex to be replaced on an interim basis by Tom Mackay

The entire staff of Dolphin Drilling ASA, including chief executive Ivar Brandvold and chief financial officer Hjalmar Krogseth Moe, have been laid off, with Anette Olsen and Richard Olav Aa also quitting the board

Neil Carson has joined the board of Shell

Alan Boeckmann and Frank Bowman have retired as directors of BP

Stephen Kersley has been named chief financial officer of Gulf Marine Services

Arno van Poppel has replaced Gerard Keser as chief executive of N-Sea Helm

Mark Prendergast is retiring as chief executive of Harris Pye Engineering Group

Sound Energy has appointed Simon Davies to...