Baker is MAB’s second senior appointment of 2013 following the addition of key account director Simon Hendy in February.
He joins MAB from Personal Touch Financial Services, where he was head of compliance for two years.
Prior to this he worked for sixteen years as head of compliance for national adviser network Sesame and for a further seven years as a compliance manager in the insurance industry.
Baker takes over from Helen Duffy who retires this month.
Peter Brodnicki, chief executive of MAB, said: “We are delighted to welcome Stewart as our new compliance director and I am confident he will prove to be a real asset to the business.
“His track record is outstanding and it is a real coup for us to add him to our senior management team.
“Quality is absolutely crucial as the market returns to growth, both to lenders and the Financial Conduct Authority.
“It has always been a cornerstone of our business and Helen has made an outstanding contribution to build our reputation in this area.
“We will continue to call on her expertise as a consultant while she enjoys a well-deserved retirement.”
Baker said: “I am excited to be part of MAB’s highly regarded management team. Its progress as a business has been impressive and I look forward to continuing to grow its reputation for valuing quality alongside innovation and service.”