Merrett was appointed managing director of Largemortgageloans.com in 2017, and prior he was at Alexander Hall for 15 years as its technical director.
He will have responsibility for helping to shape and create the future direction of the mortgage club, working alongside the senior management teams, in the new role.
His appointment follows the addition of two new lender account manager roles earlier this year, filled by Marc Gordon and Daniel Wraith, plus additional help desk support.
The new roles were introduced in order to support the growth plans of the club and in an effort to deliver “excellent service” to its members.
Martin Reynolds, chief executive of SimplyBiz Mortgages, said: “We are delighted that someone of Richard’s calibre has chosen to join us as we expand our business to help better serve our members and lender partners.
“Richard has a wealth of experience within the industry – at both management and business writer level – that I believe will be important as we develop our business model.”
He added: “We have invested in a number of new key personnel during 2019, with more to follow in 2020, to ensure that SimplyBiz Mortgages continues to lead the way with its club and compliance proposition.”
Merrett (pictured) said: “I am thrilled to be joining SimplyBiz Mortgages and to help develop its excellent proposition even further.
“I look forward to working closely with our member firms and lender partners to help shape the future of the club.”