UK -  Mark Anson is to step down as chief executive of Hermes Pensions Management at the end of August after just 18 months at the investment manager.

He cited family reasons for the move, which has taken Hermes by surprise, however, Anson is to join Chicago based Nuveen Investments in a senior position in September.

Anson joined Hermes in January 2006 from the US pension fund Calpers, where he was chief investment officer.

In the wake of his appointment, several senior managers left Hermes including deputy chief executive Charlie Metcalfe. He was named as CEO of First State Investments in November 2006.

Nick Mustoe also resigned as chief investment officer of Hermes In May 2006, which is fully-owned by the British Telecom pension fund.

Mustoe was appointed CIO and head of equities of Pictet Asset Management.

Hermes is now looking for a new chief executive  but the firm will be run, in the meantime, by the executive committee, led by Rupert Clarke, who is head of Hermes Real Estate Investment Management
“Mark has made a significant contribution to Hermes since he joined at the beginning of last year,” Richard Bernays, chairman of Hermes, said.

“We understand the family reasons that require him to return to the US and we wish him and his family well.”