Podesta/Clinton connection to NCMEC is Brian Podesta. Their ICMEC connection is Jeff Coons. The Koons Family Institute is an associate of ICMEC.
From ICMEC website:
KOONS & ICMEC
Most people know Jeff Koons for his art, but less known is that he is also the father of an abducted child, Ludwig. He has battled on two continents to get his son back, yet despite his fame and influence, his son was not able to be returned to his custody. Jeff Koons is a fervent advocate for protecting children and continues his work for ICMEC through this partnership and the foundation of The Koons Family Institute on International Law & Policy.