The use of Unmanned Aerial Systems (UAS) in the National Airspace System (NAS) is of concern by a number of entities. The public is concerned about safety and privacy issues. The private sector is interested in how to exploit the technology to drive down operational costs and create profit. Finally, the public sector is concerned about air safety, privacy, and policy issues, as well as, making use of the technology to drive down operational costs for numerous oversight activities from traffic monitoring to fighting forest fires. Private and public sector implementation pioneers will be faced with unique challenges. Despite the name unmanned, there is a plethora of people in the UAS operational loop from air support crews to pilots to air traffic controllers which creates an extraordinarily complex training requirement. Adding to complexity is the size and mission of the UAS as each size dictates airspace considerations, location of Ground Control Stations (GCS) and operational environments. While the US military has invested in UAS training and research, it is a new area constrained by limited resources. Thus it is incumbent on early UAS adopters to address their complex training challenges and leverage the training resources and research done by the US military. One critical NAS integration issue is training pilots to safely operate UAS, particularly medium altitude, long range UAS which will share airspace with private aircraft and amateur pilots. This paper discusses the need for and creation of a complementary family of UAS trainers. The authors draw on the training research, and training simulators and technologies developed and used at the Air Force Research Laboratory, and the commercial simulators used at University of North Dakota, and Sinclair Community College. The findings from the training fidelity assessment are presented and conclusions are drawn.