J.D. Cairnton is a member of Majestic-12.
J.D. Cairnton was presumably born to a wealthy family, and at an unknown point, Cairnton either created the Astronox Pharmaceutical Company, joined it and worked his way up the corporate ladder, or else inherited the base company, eventually amassing a vast fortune as its chairman. At some point, Cairnton was invited to join Majestic-12, a group of twelve of some of the richest men in the world.
When Majestic-12 decided to enhance their overall fortunes, they began planning to initiate a new Cold War, which their individuals businesses would benefit from and improve their wealth. Through Jonathon Killian's Axon Corp contracts with the U.S. military, they discovered a pair of top secret American projects known as Kormoran and Chameleon, which involved disguised battle tankers and clone missiles respectively. By taking over both these projects, M-12 could make several western countries believe they had been hit by terrorist missiles.
In the course of their planning, M-12 discovered that a few individuals could upset their plans due to certain skills or knowledge that they possessed, and so they decided to start a bounty hunt to keep them from doing so.
It was soon decided that Killian's Forteresse de Valois castle would be used as the verification point where the heads of the targets would be brought for assessing by Monsieur Delacroix, whom M-12 had worked with in the past.
Among the fifteen targets was Shane Schofield, a U.S. Marine with a reputation for succeeding against the odds. Unsettled by this, Cairnton and M-12 decided that they would arrange a sham mission as an ambush to increase the chances of him being eliminated.
Shortly after the hunt began, Cairnton and the other members of Majestic-12 engaged in a telconference to discuss the current happenings of their plan.
Ultimately, however, Schofield managed to disarm the Chameleon missiles and arranged for the U.S. government to bring down the Kormoran tankers, foiling Majestic-12's plan.
Soon afterwards, Cairnton was killed by a speeding truck outside his company's headquarters in New York, having been targeted for assasination by the U.S. government because of M-12's plan. In the aftermath of his apparently accidental death, Cairnton's heir inherited his fortune.