Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth. We are seeking an experienced Senior Systems Integration Engineer to support the administration, integration, testing, deployment, and sustainment of complex mission-critical IT systems. This position will work across Linux and Windows environments and provide technical leadership for software integration, system testing, troubleshooting, and field deployments.