In the new role, Chalkley will oversee the agency’s creative direction, taking over from Trevor Beattie, the founding partner and chairman. Matt Waller, BMB’s executive creative director, will report to Chalkley.
BMB’s list of client includes KP Snacks, Hilton and New Balance.
Chalkley spent nine years at Rainey Kelly Campbell Roalfe/Y&R before joining Engine in January last year.
At Engine, Chalkley was behind the "missing type" campaign for the NHS. He was also in charge of the agency’s government business and worked with WCRS on the Royal Navy.
Chalkley worked on Land Rover, Marks & Spencer, Vodafone and the BBC at RKCR/Y&R. His previous agencies include Ogilvy & Mather and St Luke’s.
Juliet Haygarth, BMB’s chief executive, said: "Jules manages to combine an understanding and appreciation of the creative drive and craft of brilliant advertising alongside the ability to create contemporary and agile creative ideas."