Robin Minter-Kemp moves to independent non-executive chairman after having been non-executive director with RSMR since 2012.
Ian Cooke, CEO of Benchmark Capital, and Keith Hare, corporate development director at Benchmark Capital, will both become non-executive directors.
Ken Rayner and Geoff Mills are to remain as executive directors.
Mr Mills said: “Having secured the investment by Benchmark Capital and with FCA approval confirmed we are embarking upon a review of the opportunities and innovations with our new partners at Benchmark.
“Robin’s knowledge of our business plus his undoubted market experience places him in an ideal position to lead the Board in these discussions.
“Part of the role will be to ensure that RSMR’s independence is not compromised as we plan future initiatives.”
He added: “Along with Ian and Keith’s experience at Benchmark this new board structure places RSMR in an even better position to grow its influence in the advisory sector over the years ahead.
“As our advisory client list continues to expand we are determined that our service proposition evolves in line with the needs of our clients, ensuring we support them as they deliver quality investment solutions to investors in these challenging times.”