Citadel LLC has appointed Kevin Nassery, a former senior technology executive at crypto-exchange Gemini Trust Company, to lead its security and risk compliance for the Americas, according to a report by eFinancialCareers.

Nassery most recently served as chief information security officer at Gemini, the digital-assets platform founded by the Winklevoss twins.

The move reflects a growing interest among hedge funds in cryptocurrency, with Citadel's sister firm Citadel Securities reportedly co-leading fundraising for a $40bn investment in crypto platform Ripple last month.