The Titans announced the hirings Thursday.
Smith is a Mableton native who graduated from Pebblebrook High School in 1986. Whisenhunt said he liked Smith’s versatility having worked in both the 3-4 and 4-3 defenses and still get production from players.
Most of Smith’s 22 years of coaching experience is in the college ranks, but he spent three seasons coaching the Buffalo Bills’ defensive line between 2010 and 2012 where he helped Mario Williams turn in 10½ sacks in 2012 with defensive tackle Kyle Williams earning a Pro Bowl berth in 2010.
Smith was out of coaching this past year, after the firing of Bills head coach Chan Gailey following the 2012 season.
“I know from having to play against him two years ago what a difficult challenge it was facing that group and how well he handled them,” Whisenhunt said in a statement. “So we are excited to get Giff here to work with our defensive line.”
Smith also coached the defensive line at Georgia Tech from 2004-09 and has worked at Tulane, Georgia Southern. He started his coaching career as a graduate assistant at Arkansas and Georgia.
Georgia Tech led the nation in sacks in 2007, and Smith coached current Titans defensive end Derrick Morgan to Atlantic Coast Conference defensive player of the year in 2009 with 12½ sacks.
Smith was a three-time All-America defensive end at Georgia Southern, where he was on three I-AA national championship teams.
The Titans had 36 sacks in 2013, with Morgan leading the ends with six sacks and tackle Jurrell Casey having a team-high 10½ sacks.
Bostad has 24 years of coaching experience and spent the past two seasons with the Tampa Bay Buccaneers as offensive line coach. He also was the run game coordinator for six seasons at Wisconsin coaching first tight ends and then the offensive line producing four All-Americans.
Whisenhunt said he has heard plenty about Bostad from people he trusts and he also likes how Bostad’s offensive lines play.
“I thought it was a good match for what we want to do,” Whisenhunt said. “Another thing that impressed me about him was number of guys that he developed that have gone on to play in the NFL. That is good sign, that he can coach and develop that type of player, which is important for a line coach.”
With the Buccaneers, Bostad helped coach a line that blocked as rookie Doug Martin ran for 1,454 and allowed only 26 sacks. The Titans gave up 37 sacks in 2013.
Bostad also has coached at New Mexico, San Jose State, Cal State Northridge and Minnesota. He was a four-year starter at linebacker at Wisconsin.