Scarnecchia replaces Erik Kunttu, who left to become the video coordinator for the Indianapolis Colts.
"I am 100 percent certain (Scarnecchia) is the right man for this job," Syracuse coach Doug Marrone told The Post-Standard. "Steve knows he made a mistake. He acknowledged his mistake and faced the consequences. I am convinced that he has learned his lesson. Steve is a Syracuse University graduate, and I am thrilled to have him back at his alma mater."
Scarnecchia earned his bachelor's degree in television, radio and film from Syracuse's S.I. Newhouse School of Public Communications, graduating cum laude in 2000.
McDaniels was cleared from the video-taping incident, but he and the Broncos each were fined $50,000 because the coach failed to report the incident, as required by NFL policy. McDaniels was fired Dec. 6, less than halfway through his four-year contract.
The league's investigation determined New England had violated rules over several seasons. Scarnecchia, who was a Jets employee when the Patriots were penalized, worked for New England between 2001 and 2005. He was found to have participated in the Patriots' videotaping when he worked for the team in the early 2000s.
McDaniels, who worked in New England from 2001 to 2009, hired Scarnecchia in Denver shortly after becoming the Broncos' coach.
The Associated Press contributed to this report.