The former global head of Citigroup’s transition management unit has re-emerged at the Abu Dhabi Investment Authority, as the world’s second largest sovereign wealth fund brings more of its assets and investment operations in-house.

Steven Dalzell has joined the fund and moved from London to Abu Dhabi, according to person familiar with the situation. He joins as head of transition management in the central dealing unit, a role in which he oversees securities transactions across all asset classes managed in-house, including equity, fixed income, foreign exchange and derivative portfolios.