Doerffler has served as an assistant coach the last four seasons with Northrop and replaces the departed Tim Martone, who went 12-28 in four seasons leading the Bruins before resigning in November.
Doerffler served as the Northrop freshman coach in 2010 and was promoted to quarterbacks coach in 2011. The last two seasons he was offensive coordinator for the varsity.
"Being a head coach has kind of always been a goal," Doerffler said. "I have spent quite a bit of time working towards that goal.
"Having coaches (around me) growing up definitely helped in terms of what I wanted to do."
The Bruins have not had a winning season since 2003, a sectional title since 1999 and an SAC championship since 1977.
"Over the last four years, Jason has shown great leadership as part of the Northrop football and baseball programs," said Northrop Athletic Director Bob Shank in a statement. "The interview committee was very impressed with his vision of strategy, game management and discipline. He has a high football IQ and great moral character.
"Jason is diligent in his preparation demonstrating (excellence) both in the classroom and playing field. We feel he has a plan to achieve great things at Northrop!"
Despite the departure of Martone, the cupboard is far from bare as the Bruins' program was developed under the former head coach from a winless team in 2009 to a competitive program over the last several years.
"I think the first order of business, in terms of where we're at, is getting the offseason weight program going," Doerffler said. "It should be a pretty smooth transition. I know the kids and the kids know me."
Doerffler played for his father, Dean, at Concordia Lutheran High School from 2002-05. He is in the top five in career passing yards in the Summit Athletic Conference with 4,208.
He was named First Team All-SAC and First Team All-State his senior season.
Interestingly enough, Martone was Doerffler's position coach with the Cadets.
Doerffler went on to play baseball in college at IPFW before beginning his teaching and coaching career. He currently teaches Social Studies at Northrop High School.
Doerffler hopes to get in contact with other coaches who worked under Martone in the next several days to gauge interest and begin to build a staff.
"Coach Martone did a great job with the program," Doerffler said. "The (focus) now is to kind of hit the ground running."