The former CEO of Helly Hansen takes over this week from current chair Peter Williams, who is stepping down from the board.
Rowan replaces founder Leon Black, while lead independent director Jay Clayton has been appointed as chair of the board.
Véronique Penchienati-Bosetta and Shane Grant have been appointed to lead the business during the search for a new CEO.
The former BHP CEO will take over from current chair Chad Holliday after Shell’s annual general meeting in May.
UK board member Mehta replaces Bill Michael who resigned last week after making controversial comments to staff.
The former chair and CEO of De Vere Group will chair Arcadia Group, Topshop, Topman and parent company Taveta Investments.
The role of the board chair has changed dramatically in the past decade, with chairs increasingly held responsible for corporate governance failures. How can board leaders ensure they are prepared for the challenges ahead?