The County Council administers a pension fund for staff employed by all the councils in Essex. The scheme has an active membership of 43,728 and the fund was valued at £3.1 billion as of March 2010.
Barnett Waddingham's head of Public Sector Practice, Graeme Muir, said: "Our appointment as actuaries to the Essex County Council Fund is a fantastic opportunity for the team. We look forward to working with them and assisting with the many challenges that lie ahead"