Gary Black, who was appointed chief executive at Janus Capital to rebuild the fund manager after poor performance and the market timing scandal before he resigned in 2009, has joined US asset manager Calamos Investments.

Black will join Calamos' investment committee and work as global co-chief investment officer alongside fellow investment chief John Calamos, who is also the firm's founder and chief executive, according to a statement yesterday from the investment firm, which managed $33.6bn in assets at the end of July this year.