Bartlett has joined from technology company FNZ.
He’s clocked up more than 15 years experience as a CFO in the UK and overseas, principally in financial services.
He served as CFO at Williams & Glyn, Westpac Banking Corporation, RBS and Alliance & Leicester.
Bartlett (pictured) said: “I’m looking forward to leading the bank’s finance function and playing a key leadership role as the bank moves into the next stage of its evolution.”
Masthaven’s managing director Jon Hall has been appointed as chief commercial officer and deputy chief executive.
Hall has worked closely with Masthaven chief executive Andrew Bloom and has been a “pivotal player” in the bank’s growth and development, the company said.
Other senior promotions include Tricia Halpin who was promoted to chief people officer.
Haplin has more than 25 years’ experience in corporate and retail banking including extensive human resource management experience.
Paul McCan has been promoted to chief technology officer. McCan has more than 30 years’ experience designing, building and managing IT systems.
He helped Masthaven to develop and launch its technology platform in 2016.
Bloom said: “Leigh is a high calibre, experienced individual who shares our vision of the bank Masthaven is and of what it can become.
“Jon has been a high quality managing director of Masthaven and is the right person to lead the day-to-day running of the bank, while we pursue our five-year plan following the investment from Värde Partners.
“His move to chief commercial officer and deputy chief executive is well-timed and well-deserved,” Bloom added.