Phoenix Operations Group is seeking a Full-Stack Software Engineer to join its team in Aberdeen Proving Ground, Maryland. The position is onsite five days per week and requires TS/SCI clearance. The engineer will work collaboratively to develop technical solutions, lead application software design, development, and testing, and build graphical user interfaces for custom applications on Linux. The role involves working with complex software projects, software life-cycle management, configuration management, and evolving requirements in an agile environment. Applicants must be willing to pursue a polygraph.