The phrase "assistant boss" refers to a person who helps or supports the main boss. They have some authority and responsibilities, but they work under the direction and guidance of the boss. Full definition
If Avram Grant doesn't impress for the rest of the season, apparently Frank Rijkaard will be offered the chance to take control at Chelsea — thus reuniting him with current assistant boss Henk Ten Cate. (caughtoffside.com)
A recommendation from former United assistant boss Carlos Queiroz would certainly be listened to by Sir Alex Ferguson, as he has aided successful moves before, and the club have strong ties with Sporting Lisbon. (caughtoffside.com)
However, the Premier League club - coached by assistant boss Steve Bould from the sidelines for the first time - responded magnificently and were soon level through a fine finish by German Lukas Podolski. (supersportlive.com)