Ryan will interview with the Bills on Thursday, according to Kimberly Jones of NFL Network.
After being fired along with Jets general manager John Idzik last month, Ryan has been linked to a variety of coaching jobs, including the Atlanta Falcons and San Francisco 49ers. Ryan reportedly met with the Falcons for five hours on Wednesday.
The Bills have a head coaching vacancy after Doug Marrone opted out of his contract last month following a 9-7 season, and Ryan's old team, the Jets, have already interviewed Marrone for their open spot.
Ryan was hired as the Jets' head coach in 2009, leading New York to playoff berths in his first two seasons before winning no more than eight games in any of his remaining seasons. He was previously the defensive coordinator for the Baltimore Ravens from 2005-08, and the team's defensive line coach from 1999-2004.
• SI's NFL Coaching Carousel
If Ryan does not accept a head coaching job, he could turn to broadcasting. Manish Mehta of the New York Daily Newsreported Thursday night that Ryan will meet with CBS executives on Wednesday regarding a "possible TV role." Ryan has already reportedly interviewed with ESPN.
- Mike Fiammetta