Executive Jet named Jim Christiansen vice president of national accounts for its NetJets fractional aircraft ownership program. For the peripatetic bizjet executive the appointment comes as something of a reunion–Christiansen served with Executive Jet back in the early 1980s when EJ was pioneering the concept of professional business jet management. Christiansen recently left TAG Aviation USA, where he was executive vice president and COO. The business aviation veteran is chairman of the National Air Transportation Association and its business aviation security task force. He was also chairman of the Fractional Ownership Aviation Rulemaking Committee (FOARC), from which came the proposed Part 91 Subpart K for regulating fractional aircraft operations.