Collins Aerospace, an RTX company, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers' toughest challenges and to meet the demands of a rapidly evolving global market. The Air Combat Test and Training (ACTT) engineering department is responsible for the design, analysis, test and certification of Air Combat Test and Training systems. We solve the challenges of next-generation pilot proficiency training so they can 'Train as they Fight.' We field Test and Training range systems with state-of-the-art technology in cryptography, datalinks, navigation, communication, networking and command and control. We specialize in highly accurate, highly secure solutions for U.S. Navy and Air Force customers. We are a system of systems development team that designs, integrates, and supports some of the largest, most complex solutions offered by Collins Aerospace. The Datalinks Embedded Software team within the ACTT department is responsible for the development of the mesh networking waveform that links together the training participants with the mission commanders. The team is looking for an experienced Principal Software Engineer to support the expansion of our Air Combat system capabilities.