Fisher told university President John Thrasher on Friday that he was resigning to accept Texas A&M's offer.
Fisher will not coach the Seminoles' regular-season finale on Saturday against Louisiana-Monroe in Tallahassee.
Florida State will find out who their opponent and destination will be during Sunday afternoon when the bowl games and matchups are revealed during ESPN's Selection Sunday show.
Fisher won the BCS National Championship in 2013 with the Seminoles and was 83-23 in eight seasons as their head coach.
This marks the first time since after the 1975 season that Florida State has had to embark on a coaching search, when it went on to hire Bobby Bowden.
"No call, no text, you could have said something..."
The chairman and CEO of Mayfair Investments LLC is Robert L. Albritton, a 1971 alumnus of Texas A&M and a member of the school's Board of Regents. FSU (5-6) needs a win to become bowl eligible.
One former FSU quarterback, Danny Kanell, tweeted, reminding Florida State to be thankful for the years Jimbo spent here and to get excited for the future. Sumlin was 51-26 in his career at Texas A&M, but the administration had grew exhausted of Sumlin after his apparent failures to build upon the 11-2 record in his first season at the school. The school's only national title came in 1939. We believe that we should compete for SEC championships on an annual basis and, at times, national championships. Odell Haggins will act as interim head coach.
Florida State had the running game going as they totaled 302 yards between Jacques Patrick and Cam Akers. I don't have any doubt about that.