David started his bodybuilding career at age of 17 with weights for his track & field events. Then, he participated in his ever first life competition the ‘Team Muscle Tech Challenge’ which he won with distinction.
After this, in 2001 he was ranked at 11th place at NPC (National Physique Committee) bodybuilding competition in the middleweight division. Later in 2004, he was placed 10th and 6th in IFBB- Florida Pro Xtreme Challenge and Ironman Pro Invitational, respectively. In 2005, he was ranked 12th and 14th in Arnold Classic and Mr. Olympia, respectively.
At present, David Henry is serving in US Air Force as a Technical Sergeant (E-6). He holds a record of being the only IFBB bodybuilding pro in US Armed Forces.