Northrop Grumman is seeking a Staff Cyber Software Test Engineer in Chantilly, VA, to join their team developing and testing mission-critical software for the Intelligence Community. The role involves testing software across environments (Windows, Linux, Android), validating requirements, developing and executing test plans, troubleshooting issues, documenting defects, and collaborating with development teams in an agile setting. Candidates must hold an active TS/SCI clearance with Polygraph, a relevant degree with extensive experience, and expertise in software/hardware testing. Preferred skills include automation scripting, mobile app testing, Agile methodologies, and UNIX proficiency. The position offers a salary range of $155,500–$233,300, comprehensive benefits, potential bonuses, and opportunities for professional growth. Northrop Grumman is an equal opportunity employer committed to diversity, inclusion, and ethical practices.