Citi announced the appointment of Brent McIntosh as general counsel and corporate secretary, effective Oct. 25.

McIntosh will replace Rohan Weerasinghe, who the bank announced in March is retiring at the end of the year. “While Brent will begin serving as general counsel right off the bat, Rohan will stay with us through the end of the year to ensure a smooth transition,” Citi CEO Jane Fraser said in a company memo.

McIntosh will join Citi from venture capital firm Andreessen Horowitz, where he has served as an advisory partner the past four months, according to his LinkedIn profile. He previously worked at the Treasury Department as general counsel for two years before serving an additional year-plus as under secretary for international affairs.

“Given our global network, his deep understanding of the various regulatory regimes under which Citi operates will be of great value as we begin the execution phase of our Transformation,” said Fraser in the memo. “I look forward to his counsel as we navigate the exciting challenges and opportunities we encounter at this wonderful institution.”