It plans to enter the residential mortgage market first with intentions to expand into the buy-to-let market at a later date, Mortgage Solutions understands.
Ian Henderson, ex-Kensington CEO is working with the team which is currently assessing the viability of a launch into both markets.
Mark Snape quit as managing director of mortgages in October last year to work for conveyancing firm Myhomemove as corporate sales director.
Secure Trust Bank currently offers savings, current accounts and personal loans.
The bank declined to comment.