Jason Rynbeck, vice chairman of mergers and acquisitions for the Asian-Pacific region at Barclays, has left the bank, the latest in a string of exits by senior executives as the firm prepares to scale back on investment banking.

Rynbeck left Barclays on May 8 after staying with the London-based bank for six years, according to a Hong Kong Securities & Futures Commission filing. Rynbeck couldn't be reached for comment.