Citigroup has appointed Rohan Weerasinghe as general counsel and corporate secretary. Michael Helfer, who has been general counsel and corporate secretary for nine years, will become vice chairman. Both appointments are effective June 1.

Weerasinghe will be joining the bank from international law firm Shearman & Sterling, where he served as senior partner for the past seven years. For the past 35 years, Weerasinghe has advised and represented financial institutions and corporations on issues including corporate governance, complex transactions, and IPOs and debt issues.

Citi's business unit general counsels, regional general counsels, and corporate deputy general counsels will report to Weerasinghe.