Hackett, son of former long-time NFL assistant Paul Hackett, was with Doug Marrone at Syracuse and then with the Bills. #Jaguars— Ryan O'Halloran (@ryanohalloran) January 16, 2015
Hackett spent the last two seasons as the Bills offensive coordinator under Doug Marrone and was also on staff with Marrone at Syracuse as the offensive coordinator and quarterbacks coach. Hackett also had a previous stint with the Bills as an offensive assistant and served as an assistant on the Tampa Bay Buccaneers while Gus Bradley was a linebackers coach.
The big feather in Hackett's cap is that the Bills were an effective team, finishing 9-7 last season, with Kyle Orton at the quarterback position. Interestingly enough, Gus Bradley mentioned on his show that the person they're looking for doesn't necessarily have to have had a highly ranked offense, because they might have had a good scheme and game plan, but not a quarterback or something else.
There's also some interesting comments from Bills running back Fred Jackson that Hackett may have been held back.
Personally, I think Hackett is one of the better options the team has interviewed recently.