Jonathan specialises in the regulation of banks, micro-finance in Africa, Asia, and South America. He has a particular focus on the regulation of mobile money.
A lawyer by background, Jonathan has served as a legal advisor to the United Nations in relation to the regulation of mobile money in five Pacific countries (Fiji, Papua New Guinea, Samoa, Tonga, and Vanuatu). He has advised the central banks of Timor-Leste and Malawi.
Jonathan has conducted in-country research into the regulation of micro-finance and mobile money in Bangladesh, Cambodia, Indonesia, India, Malawi the Philippines, and Timor-Leste.
He has won research funding from Harvard and Oxford universities. He is currently developing his research through doctoral research at Oxford.
From 2003-2013 he served as founder and president of Step Safe, an organisation that provided funding to humanitarian programs in Cambodia. He also serves on the United Nation's Pacific Roster of Experts.