London-based sustainable investment manager Osmosis Investment Management has made multiple senior appointments, including the hiring of former Legal & General executive Fadi Zaher as its next chief investment officer.
Zaher, previously L&G’s head of index solutions, will join Osmosis on April 2, 2026. He is set to lead the firm’s next phase of systematic research and product innovation.
Silvio Corgiat Mecio has joined as head of systematic solutions, while Jason Lee will arrive on November 19, 2025 as quantitative developer and researcher. Fanggang (Royce) Yan has been appointed senior quantitative analyst.
Osmosis has also appointed Colm O’Brien, formerly head of LGIM Index for EMEA, as global head of strategy and client solutions. O’Brien joined the firm in September and will work with Zaher and the investment team to align Osmosis’s systematic research with the evolving requirements of global institutional investors.
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Ben Dear, CEO, Osmosis Investment Management, said: “While the current climate for sustainable investing remains politically and commercially challenging, we believe this moment presents a unique opportunity to build out our capabilities and ensure investors can navigate the complex challenges that lie ahead. These appointments are key to that commitment. The new team’s deep expertise in systematic and factor-based sustainable investment perfectly complements our strategy and supports our mission to deliver innovative, climate-aligned solutions for our clients.”
Colm O’Brien, global head of strategy and client solutions at Osmosis, said: “I’m delighted to join Osmosis — a firm I’ve long admired for its innovation, focus, and genuine commitment to sustainable investing. As we expand globally, I look forward to building on this legacy and helping shape the next generation of investment solutions for our clients. With our new hires and Osmosis’s existing expertise, we have an exceptional opportunity to redefine what responsible investing can achieve.”
