Davis joined the Purdue staff in 2013 after spending the previous two seasons with Hazell at Kent State. Davis spent the previous four years as a strength assistant at Ohio State University where Hazell was the wide receivers coach. He arrived at OSU as an assistant strength coach in January of 2007, before moving to strength and conditioning coordinator in May of 2008.
He designed and implemented the year-round strength, speed and conditioning program for the Buckeyes. He specifically trained the Ohio State wide receivers and defensive backs on a daily basis and also prepared a number of Buckeyes entering the NFL Draft. Specifically, he coordinated the training of seven Buckeyes selected in the 2009 draft, including first-round picks Malcolm Jenkins and Chris Wells.
Prior to his stint at Ohio State, Davis was a strength and conditioning coach at the University of South Florida, working with the football team and the sprinters, hurdlers, and jumpers on the Bulls' track and field team.
Davis is Strength and Conditioning Coach Certified (SCCC) by the Collegiate Strength and Conditioning Coaches Association, has a USA Weightlifting Club Coach Certification and holds certifications from the National Academy of Sports Medicine as a Performance Enhancement Specialist (PES) and from the National Association of Speed and Explosion.
Davis earned his bachelor's degree from Ohio Dominican University in 2004 and his master's degree in exercise science from California University of Pennsylvania in 2009.
Quoting Coach Hazell -"Known to be one of the best strength coaches in the country, Doug is a phenomenal motivator with a wealth of old and new training knowledge. He has a great relationship with the players he trains and gets every ounce out of each one of his athletes. He trains guys to be game-ready and to win football games."