Carnell, who quit Pirates in February, has been appointed assistant coach at Major League Soccer side New York Red Bulls.
"I am excited. I am leaving tonight," Carnell tells snl24.com/kickoff.
"It's been a long time coming. We had a lot of meetings at the beginning of the year and needed to clear a few things up and that’s why it took so long.
"Finally I am happy to reach my dream and take my career to another level. I am humbled and looking forward to it."
The former Bafana Bafana defender will become the first South African to coach in the MLS, and hopes it will open doors for his compatriots.
"This gives hope to everybody. I have received a great response from guys who want me to help. I hope this will open many doors for local coaches who want to go and work overseas. I am ready to do well and represent my country very well."