Leidos is seeking a quality Applications Developer to develop, enhance and maintain enterprise/departmental IT systems. This position requires in-depth hands on experience developing software in an environment where customer focus, cooperation, communication and continual trade-craft improvements are the norm. This position is located in the Herndon area. Candidates must have an active TS/SCI with polygraph clearance to be considered. PRIMARY RESPONSIBILITIES: The successful candidate will design/develop programmatic solution-based systems against customer requirements, write applications in a development environment, create test data, perform multiple tests, deploy to production, and support production systems as needed. Other ad hoc duties may include maintenance/updates/patching and backups/recovery as required to maintain currently functionality as well as security accreditation, and process evaluation, review of new products, and collection of data and reports generation, etc.