NEW HAVEN, Conn. — Jacksonville Jaguars assistant Tom Williams has been hired at Yale, becoming the first black head football coach at the Ivy League school.

A person familiar with the decision confirmed the choice Monday on condition of anonymity because a formal announcement had not been made. The school called a news conference for 2 p.m. Wednesday to introduce the new coach.

The 38-year-old Williams has spent the past two seasons working with the Jaguars defense and has been an assistant coach at Hawaii, Washington, Stanford and San Jose State. He was a defensive coordinator in his final year at UH in 1998.

He replaces Jack Siedlecki, who retired in November after 12 seasons to become an assistant athletic director at Yale. Siedlecki was 70-47 at the school, including 47-37 in the Ivy League, and led the Bulldogs to a share of the conference title in 1999 and 2006.