Griffiths will be based in London and will report to John Sergides, global head of sales and marketing.
In his new role, Griffiths will lead the fund financing team, responsible for servicing hedge funds and private equity lines of subscription.
Prior to MUFG, Griffiths was managing director and CEO at Citco Financial Products, a subsidiary of Citco Group.
Before Citco, he was part of the fund-linked product teams at Bank of America and Societe Generale.
Griffiths commented: "I am delighted to join MUFG Investor Services’s Fund Financing practice and be part of a team that consistently delivers high-quality solutions to an impressive list of alternative investment management clients.”