Assist with technical requirements compliance pertaining to avionics development, test, sustainment and operations pertaining to navigation, voice communication systems, L ine of S ight (LOS) and B eyond L ine of S ight (BLOS) data link systems, military and civilian communication networks, network protocols, Information Protection Security ( IPSec ) , Simple Object Access Protocol ( SOAP ) / Extensible Markup Language ( XML ) packaging of network commands and air data systems to include performance, integrity and airworthiness . + Apply knowledge of systems engineering in support of system definition, development, integration, verification methods, sustainment, risk modeling/simulation, testing and evaluation, human system integration (HSI), crew stations engineering , OSS&E efforts, interoperability requirements, and airworthiness certification across a wide range of hardware and software systems, including ground based systems .