"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.

Nielsen has a deal in place with the Bills, as first reported by The Athletic’s Bruce Feldman. He will be brought in as a senior defensive assistant as part of Sean McDermott ‘s staff. Feldman adds Nielsen had interest from multiple teams during the 2025 hiring cycle.