ZURICH, June 12 (Reuters) - UBS on Monday announced changes to the executive board of Credit Suisse AG in an internal memo circulated after the Swiss bank announced it had officially closed the takeover of its former rival.

Chief Financial Officer Dixit Joshi and General Counsel Markus Diethelm are among the executives leaving, wrote Ulrich Koerner, Chief Executive of the new UBS subsidiary Credit Suisse AG.

Alongside a string of new appointments, the memo also said Andre Helfenstein, the head of Credit Suisse's domestic business, will remain in his role.

(Reporting by Noele Illien, editing by John Revill)