Mr Holden-Craufurd, who provides investment management services for a substantial number of private clients and trustees, previously spent 13 years at Rathbones.
Prior to that he worked at Dexia and Ely Fund Managers, having joined the industry in 2000 following seven years in the Life Guards.
Mr Holden-Craufurd said: “I’m excited to be starting this next chapter in my career and look forward to introducing clients to JM Finn.
“The firm’s unwavering focus on and prioritising of their clients and their market leading systems that maximise the time available to service those clients and manage investments were key factors in choosing to join JM Finn.”
Steven Sussman, chief executive officer, JM Finn, said: “We look forward to welcoming Marcus to the firm and are extremely pleased he has chosen JM Finn as a suitable firm from which he can continue to provide a top quality service to clients.”
He will be based at the firm’s the London office.