|College:||West Virginia University|
|Career highlights and awards|
Holcomb worked as linebackers coach, assistant track coach and physical education instructor at Colby College in 1997. He started his coaching career as a graduate assistant at Temple from 1995–96, helping with linebackers
He spent six years from 1998-2003 at Bloomsburg University as linebackers coach and special teams coordinator. From 2004–05, Holcomb coached at Kutztown University, where he was the defensive coordinator and defensive backs coach in addition to being the interim head coach in the winter of 2005.
He oversaw the defensive line at Lafayette from 2006-08. Under Holcomb's tutelage, five different defensive linemen claimed All-Patriot League honors. During his final season in 2008, the Leopards led the conference in several defensive categories, including total defense and scoring defense. In his first season in 2006, Holcomb contributed to a unit that finished first in the Football Championship Subdivision in total defense, fourth in rushing defense and eighth in scoring defense. 
New York Giants
In 2009, he joined the New York Giants as the defensive quality control coach. In 2011, he was promoted to defensive assistant to Perry Fewell. He won a Super Bowl ring with the Giants in Super Bowl XLVI.