Jeff Parker is chief executive of Paymentology, the London issuer processor that runs card programs for digital banks, fintechs, and banks in more than 65 countries. He took the job in December 2023 after two decades in cross-border payments and card infrastructure, much of it outside his home market.
Four Continents of Payments
Parker has lived and worked on four continents. His career began in financial services and consulting, with senior roles at Macquarie, JP Morgan, and Accenture, and he later became chief enterprise officer at OFX, the Sydney international money transfer company.
He then ran World First, the foreign exchange and cross-border payments firm, as chief executive through its sale to Ant Group. From there he joined Marqeta as senior vice president and managing director of its international business, building the card issuing platform’s presence outside the United States.
Running Paymentology
When Paymentology appointed him chief executive, it had already merged with Tutuka in 2021 to widen its reach. Parker took over from interim co-CEOs and set about pushing the company into growth. In FY2025, new sales rose 117% and transaction volume 65%, and in May 2026 the company raised $175 million in an investment co-led by Apis Partners and Aspirity Partners.
He sees the money as a way to put Paymentology’s name on the map. In his view, issuer processing is roughly 10 years behind acquiring, with many banks still running card programs on systems built decades ago.
The Legacy Problem
Parker’s pitch to banks and fintechs is that modern card programs need modern plumbing, and that the plumbing has to work in Riyadh, Manila, and Mexico City as well as London. Speaking at Money20/20 Middle East in 2026, he spoke about building that infrastructure for issuers in fast-growing markets such as the Gulf.
