'Dennison comes to Buffalo after spending the past two seasons as the Denver Broncos' offensive coordinator. A 22-year NFL coaching veteran, Dennison began his coaching career in 1995 with the Broncos–going on to fill a multitude of roles including an initial stint as the team's offensive coordinator from 2006-2008. In addition to the Broncos (1995-2009, 2015-2016), Dennison has spent time with the Houston Texans (2010-2013) and Baltimore Ravens (2014).'