Investment consultancy Mercer will make the chief executive of JLT, a smaller rival being bought by its parent, its new chief operating officer when the acquisition completes, it said on December 6.

Bala Viswanathan, who has led JLT for three years, will join Mercer after the closing of the takeover deal, which was announced in September. Mercer’s parent, the insurance broker and consultancy Marsh & McLennan, will buy JLT for £4.3bn once regulatory hurdles are cleared.