Yousefi is believed to have been appointed sales and distribution director at Freedom Lending, which was acquired by Merrill Lynch last July.
But an official leaving date for Yousefi is yet to be confirmed and he will remain with A&L until a successor is found.
A spokeswoman for A&L says: “We will be looking at a range of potential candidates from inside and outside the company.”
Yousefi says: “I have been presented with a fresh opportunity to develop my career in the intermediary mortgage market.”
Last week, Mortgage Express also lost a senior staff member to Merrill Lynch after product development manager Andrew Moss quit to join Mortgages PLC.