Citadel Investment Group has fired its head of quantitative credit, David Hensle.
Hensle, who has been with the firm since 2006, was dismissed in April, Reuters reports. It is unclear why Hensle, whose portfolio was up this year and flat last year, was let go.
Citadel confirmed Hensle's exit.
Hensle's former unit has been taken over by Jamey Thompson, who also recently took the helm of the hedge fund's fundamental credit group.
Hensle joined Citadel from Bank of America, where he was head of U.S. liquid structured credit market-making. He and Becket Wolf were promoted to co-heads of structured credit at the hedge fund in 2009.