NEW YORK, March 21 (Reuters) - Karen Peetz, a senior executive overseeing Citigroup Inc's transformation efforts to help the bank tackle regulatory consent orders, is retiring, a memo seen by Reuters said.

Peetz, who is the chief administrative officer, will stay until May to help newly-appointed chief operating officer Anand Selvakesari in his role, the memo said.

(Reporting by Saeed Azhar Editing by Chris Reese)