Aston previously worked with the management team at Purple Loans, after which she worked as a packager in the mortgage market.
She will be charged with developing relationships with lenders and strengthening Promise’s position in the market.
Steve Walker, managing director, Promise Solutions, said: “We have had a niche mortgage packaging department for many years but following regulatory changes, including the implementation of the Mortgage Market Review, we're seeing a greater need for our services within the market and have developed a number of valuable relationships.
“As a result we decided now was the right time to grow our team and make that side of the business a key focus of our business strategy going forward.
“Helen has worked with us in the past and was always a fantastic asset. Since returning to the company she has fitted right back into the team and I have no doubt she will drive forward this department with vigour.”
Aston added: “I'm delighted to be working with the management team at Promise once again. This is a hugely exciting time for the mortgage market and I hope my experience and input will help Promise replicate its huge second charge success in the first mortgage marketplace.”