InGen employed numerous personnel for the Jurassic Park project on Isla Nublar. Ranging from construction crews for building the park, geneticists and other scientists such as Henry Wu, Abby Nakajima, Derek Hoyle and Dr. Gustavus in charge of cloning the dinosaurs, veterinarians such as Gerry Harding, computer technicians such as Dennis Nedry and Ray Arnold responsible for operating the park’s control systems, security forces lead by Robert Muldoon, Helicopter pilots for bringing visitors to the island, to gas-powered Jeep drivers that probably served the purpose of also being tour guides and guest relations that would welcome investors and other visitors to the island. The staff is shown to be made up of diverse people. No definite number of personnel is known though.