D'Agostino announced Friday he is leaving the National Nuclear Security Administration, which funds and oversees work at the Sandia and Los Alamos national labs in New Mexico. The research centers employ about 20,000 people in the state. He was appointed to the post by President George W. Bush.
D'Agostino, a former Naval officer, said he wants to spend more time with family and says periodic leadership changes make organizations healthier. His deputy, Neile Miller, will step in as acting director.