He scored 128 goals in the Premier League, making him one of the English game's highest goalscorers in recent times.
"It is Jimmy's ambition now to become a coach," added Nijman of a player who never played in his own domestic league.
Hasselbaink spent part of the summer training with Norwich City but that was just to keep himself fit.
He joined Leeds from Portuguese side Boavista in 1997, played for Chelsea between 2000-2004, spent two years with Boro and then a season each with Charlton and Cardiff.
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