"Former Jaguars and Falcons defensive coordinator Ryan Nielsen is expected to join the Bills staff as a senior defensive assistant. Nielsen also spent six seasons with the Saints as D-line coach and co-DC. He drew high interest from multiple teams in this cycle," The Athletic's Bruce Feldman said.

According to a tweet sent by The Athletic's Bruce Feldman, former Jacksonville Jaguars defensive coordinator Ryan Nielsen is on the move. Feldman reports that Nielsen will join the Buffalo Bills as a senior defensive assistant. New Jaguars head coach Liam Coen has opted to rebuild his own staff, leaving Nielsen and several others without jobs.

Ryan Nielsen has served as a defensive coordinator on three different teams over the past three years. He will not have another DC gig in 2025, but he has landed a new opportunity in the NFL.

The Jacksonville Jaguars were hoping the hire of Ryan Nielsen would make the defense better. Instead, it finished as one of the NFL's worst units.