Job Description ECS is seeking a Journeyman Software Developer, Systems Software to work in our O/Fallon, IL office. ECS Federal is looking for a Journeyman Software Developer who possesses and applies expertise on multiple complex work assignments. The ECS Team provides development and support of GATES, a mission-critical application providing cargo and passenger manifesting and in transit visibility requirements for the DoD. We are seeking a Java Developer with experience developing Web appl