After six years as Barclays (NYSE:BCS) Group Finance Director, Chris Lucas has opted to step down from his post and the Barclays board effective Aug. 16, the company announced today.

Lucas had planned to retire on Feb. 28, 2014, for health reasons, but he said in the company release that he had determined that staying on until early next year would "no longer be possible."

Barclays Group Financial Controller Peter Estlin will take over for Lucas on an interim basis until Oct. 15, at which point Tushar Morzaria will assume the Group Finance Director role, the company said. In announcing Morzaria's appointment last month, the company said he was currently Chief Financial Officer, Corporate and Investment Banking, at JP Morgan Chase, where he had spent the majority of his career.

Antony Jenkins, Barclays Group Chief Executive commented, "I am very grateful for his [Lucas] support, advice and wisdom during my first year as Chief Executive." Barclays Chairman Sir David Walker added that Lucas "has successfully navigated Barclays' finances through one of the most difficult periods in its history, and he has every right to be proud of what he has done here."