“Architect of themes”: Former Soros and Fortress macro hedge fund veteran William Callanan builds momentum with novel outsourced CSO venture Submitted 08/09/2020 - 4:00pm William Callanan – a veteran of the investment management industry and a global macro hedge fund specialist, whose resume includes stints at Soros Fund Management and Fortress Investment Group – is capitalising on evolving outsourcing trends with Syzygy Investment Advisory, a novel advisory unit that provides an outsourced chief strategy officer role to an assortment of institutional investors, hedge funds and family office clients.