GREEN BAY – The Packers have hired Mike Pettine as their new defensive coordinator.

Here is a brief introduction to the 51-year-old Pettine:

Prodigious defenses

Pettine enjoyed an impressive four-year stint as the New York Jets' defensive coordinator under Rex Ryan from 2009-12. He has utilized a 3-4 scheme in the past built around blitzing and press-man coverage.

During those four seasons, Pettine's defenses held opposing passers to an NFL-low 71.0 quarterback rating, completion percentage (52.6 percent), and passing yards (186.3 yards per game).

New York yielded the second-fewest yards per game (294.8) and posted a 34.6 third-down efficiency mark while holding their opponents to an average of 20.0 points per game (seventh-fewest in the league).

New York's defense recorded 115 takeaways in Pettine's four-year tenure – the second-most in the AFC (seventh in the NFL). New York had nine 100-yard receiving games against from 2009-2012, the fewest in the league.

During Pettine's first year as defensive coordinator in 2009, the Jets topped the second-place Packers to lead the NFL in total defense (252.3 yards per game) and also ranked first in pass defense (153.7 passing yards per game). New York then finished third, fifth and eighth in total defense over the next three years.

Pettine joined Doug Marrone's coaching staff with the Buffalo Bills in 2013 and fashioned another Top 10 defense before being hired as the Cleveland Browns' head coach the following year.

Head-coaching experience

Pettine was named the 15th full-time head coach in the history of the Cleveland Browns on Jan. 23, 2014. He served two seasons as head coach, presiding over the last Browns team to hold a winning record (7-4) midway through his inaugural campaign in 2014.

Pettine has been out of coaching since the conclusion of his second and final season in Cleveland in 2015.

Breaking in to the pros

Pettine broke into the NFL as defensive assistant with the Baltimore Ravens in 2002. In his last four seasons with the Ravens, he coached the outside linebackers as part of a defensive unit that ranked fifth (2005), first (2006), sixth (2007) and second (2008) in the NFL under Ryan.

Pennsylvania roots

A native of Doylestown, Pa., Pettine got his start in coaching as a graduate assistant at the University of Pittsburgh in 1993-94 before serving as the head coach at North Penn High School Towamencin Township, Pa., and William Tennent High School in Warminster, Pa.

He won 45 games during his five seasons at North Penn, including an 11-2 mark in 1999. While at William Tennent, Pettine led the program to a school-record nine wins in 1996.

Family ties

His father, Mike, Sr., was the head coach for 33 years at Central Bucks West High School, where Pettine earned all-state honors as a quarterback and defensive back. He later served as an assistant coach on his father's staff for five seasons (1988-92).

Mike Sr., retired in 1999 as the winningest coach in the history of Pennsylvania high school football with a career record of 326-32-4.

A two-year letterman as a free safety at Virginia, Pettine led the team in interceptions in 1986, including tying a school record with three in one game against North Carolina State. He graduated with a degree in economics.