Matrix Chambers chief executive Nick Martin is leaving to take up a similar position at niche civil liberties firm Bindman & Partners.
Martin has been at Matrix since its foundation in 2000, prior to which he was chief executive at One Garden Court, having come into the bar from a career as a management consultant.
He joins Bindmans, with which Matrix has a longstanding relationship, as its new chief executive in September.
Over the past five years, Matrix has developed a thriving human rights and public law practice and is now branching out into other fields. Since its launch, Mat-rix's turnover and membership have more than doubled, allowing it to reduce members' charges by 20 per cent.
Martin said: "It's a bigger team to work with and a more complex management challenge. I'm very excited about working with them on their future strategy."
Bindmans partner Saimo Chahal said: "We're delighted that Nick has agreed to join the firm as chief executive.
"He made a major contribution to the success of Matrix Chambers and we're all looking forward to working with him to meet the challenges that lie ahead."