Cheseldine will be holding a similar role at LCP, and his move is said to be amicable, and is understood not to be related to Hewitt’s merger with Aon.
He joined Hewitt from Watson Wyatt in 2005, where he spent eight years as a senior consultant.
A spokesman for Hewitt says: “Andy has made a great contribution to Hewitt Associates and we wish him well in his new role.”