Catherine Diamond has been appointed as the firm’s chief people officer and carries experience honed from time spent at organisations including TSB, Lloyds Banking Group, HBOS plc, Bank of Scotland and, most recently, Prima.

Joining as director of strategic growth is Darvish Heshejin, who brings experience developing technology-driven propositions in the consumer and SME sectors, most recently as the VP of growth at Selina Finance and at digital SME lender, Kriya.

Also joining is Marriam Malik as company secretary and general counsel — Marriam has a broad range of experience in finance, commercial and corporate law, spending half of her career working with finance teams in London City law firms and the other half working in-house in retail, corporate and institutional banking divisions of international banks.

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Meanwhile, Adi Kadle, joins Tandem as director of engineering, from JP Morgan where he was executive director for IT — Adi is also deeply passionate about sustainability and philanthropy, having led initiatives like JP Morgan’s Go-Green program.

Commenting on the appointments, Alex Mollart, CEO at Tandem Bank, said: "I’m delighted that we can make this announcement today.

“Bringing these talented individuals on board is another great step in the development of Tandem — their wealth of expertise and experience is crucial as we work together to continue to develop Tandem further and bring our green mission to life — banking for a greener future.”

In May, Tandem appeared in the Sunday Times best Places to Work List, appearing in the top 10 of the  company’s big organisations category.