Jim Martin co-founded Add Partners after an 18-year career at 3i plc, where he was most recently Director and Head of European Technology Investing. Jim was an early pioneer of technology investing in Europe, and under his leadership 3i's European Technology business grew from 10% to 60% of the firm’s overall business. When Jim left 3i in 1999 to found Add Partners, the 3i’s technology portfolio was valued at $1.6bn, invested in 500 companies. To date, some 300 of those companies have been successfully sold or listed. Previously, Jim was Director and Head of 3i's Cambridge Technology Fund. He also founded the Quantum seed funds and was formerly Chairman of the EVCA Technology Group. Jim is a fully qualified Chartered Accountant.

Maisy Ng co-founded Add Partners with more than 10 years’ technology and venture capital experience that spans Asian, American and European markets. Maisy was most recently a Senior Manager at Vertex Management, the Singapore-based multinational private equity firm. Maisy was part of the pioneering team that established Vertex’s European operations and headed their European office in London. During the prior eight years, Maisy worked in the semiconductor industry, where she was a chip designer in Silicon Valley and Singapore before moving into Product Marketing. Maisy is named as a co-inventor in six US technology patents.

Maisy is Singaporean. She holds a BASc in Electrical Engineering from the University of Toronto; a MSc in Electrical Engineering from the California Institute of Technology; and a MSc in Management of Technology from the National University of Singapore.