Our Federal Government spectrum customers are faced with the challenge of managing a large suite of spectrum assets for a variety of missions. These assets entail a full diversity of radio communications services and applications (e.g., radar, satellite, mobile, etc.). With the rapidly changing communications technology environment, our customers require timely evaluations of proposed regulatory changes for their existing systems and their future developments in order to provide optimal support to our warfighters. eSimplicity spectrum engineers work within local and national regulatory authorities and international and regional groups to consult on terrestrial (fixed microwave, maritime mobile, ground mobile, aeronautical mobile, IMT) and satellite (low earth orbit (LEO), medium earth orbit (MEO), highly elliptical orbit (HEO), geosynchronous satellite (GEO)) telecommunications systems.