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 11^th place at NPC (National Physique Committee) bodybuilding competition in the middleweight division.  Later in 2004, he was placed 10^th and 6^th in IFBB- Florida Pro Xtreme Challenge and Ironman Pro Invitational, respectively. In 2005, he was ranked 12^th and 14^th 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.