TS Anil joins from Visa and will start his job at Monzo early next year.
Monzo has beefed up its offensive on the US market with the appointment of its first dedicated CEO to oversee its operations across the Atlantic.
TS Anil is taking up the new role at Monzo joining from Visa, where he was latterly Global Head of Products and Platforms at the US financial services company.
Anil has over 25 years’ experience in payments, credit cards and banking, working globally across EMEA, APAC and Americas.
His focus will be on driving growth in the US as well as hiring across product, operations and technology and overseeing engagement with US regulators.
Anil said: "Over the last five years I have watched Monzo's journey from small UK start-up to a fully-fledged bank with other three million customers.”
"Joining Monzo as US CEO is a fantastic opportunity to help recreate that magic in the US, and I’m delighted that I’ve been given the chance to be part of a team building the bank of the future in a market as large and exciting as the US."
"I've had a fantastic tenure at Visa, and I can’t wait to lead this Monzo team. I have enormous respect for my new colleagues who are incredibly talented, humble and focused on doing the right thing for our US customers."
Blomfield said: "TS is a seasoned leader, with deep banking experience around the world. He's had success leading teams in India, Singapore, Japan and the US, before taking on a role as Visa's Global Head of Payment Products & Platforms in San Francisco."
"Having spent time with TS over the last year, I was hugely struck by his thoughtfulness and deep sense of empathy. I think he's the perfect person to lead the Monzo business in the US and to represent our culture and values."
Monzo launched in the US in July this year, looking to take market share from the established banking giants.
London-based Monzo initially offered a "few thousand cards" to US customers.
To help with its US launch, Monzo partnered with domestic lender Sutton Bank.
LA will be Monzo's initial US base, ahead of an expected launch in other cities.