He formerly worked in Axion's R&D division, where he created a "foolproof" security system for the lab. Unfortunately, it wasn't foolproof against ghosts, as they can walk through walls. After a ghost break-in, Damon was demoted to security guard. This caused his daughter Valerie to begin holding a personal grudge against ghosts, Danny Phantom in particular, whom she blamed him for all the misfortune she and her father had suffered. Damon was later given back his old job in R&D following Axion's corporate takeover by Vladco, but Valerie's grudge still remained.
In "Reign Storm," Valerie's ghost hunter identity was exposed to Damon (by Danny, no less). After this, Damon tried to forbid his daughter from battling ghosts, as well as using weapons in the house.
In "The Ultimate Enemy," Damon is seen in the future Amity Park with an eye patch and a missing left arm. He and Valerie led the city's anti-ghost defenses and were headquartered in the remains of Fenton Works until Dark Danny destroyed it.
- 110. "Shades of Gray"
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