The Yankees have hired Jean Afterman to replace Kim Ng as GM Brian Cashman’s assistant, The Post has learned.

Afterman, 41, comes to the Yankees with impressive credentials.

She has a law degree from the University of San Francisco, is a certified agent and has strong ties to the Players Association.

As a consultant to agent Don Nomura, she played a huge part in securing Hideki Irabu a $12.8 million contract from the Yankees in 1997.

Afterman replaces the highly respected Ng, who left in November after four years as Cashman’s assistant.