System Administrator– Must have an active TS / SCI Clearance, with Security Clearance

Synertex is seeking a exceptionally skilled Systems Administrator to support our Classified Cyber Operations Client in Ft. Belvoir, VA, enabling high-impact red team operations through secure, resilient, and well-managed infrastructure and environments. Benefits include competitive PTO, 11 Paid Government Holidays, a 401k with 6% match, and a comprehensive list of health care options. Clearance: TS/SCI RESPONSIBILITIES: * Administering sensitive operational and developmental networks and systems supporting DTRA Advance Red Cyber mission needs. * Managing Windows Active Directory environments, hypervisors, Linux and Windows virtual machines, and Apache web servers. * Operating and maintaining AWS cloud instances in support of program infrastructure. * Managing and securing network firewalls to protect sensitive environments and services. * Supporting modern infrastructure patterns including microservices (Kubernetes), infrastructure as code (Terraform), and containerization (Docker). REQUIREMENTS: * 3+ years of experience administering sensitive networks and systems in accordance with DoD cybersecurity policies, procedures, and best practices. * Experience managing Windows Active Directory environments. * Experience with hypervisors. * Experience supporting Linux and Windows virtual machines. * Experience with Apache Web Servers. * Experience with AWS cloud instances. * Experience managing network firewalls. * Experience with microservices (Kubernetes), infrastructure as code (IaC) such as Terraform, and containerization tools like Docker. DESIRED QUALIFICATIONS: * Strong communication skills and comfort working in a mission/customer-facing environment. * Willingness and ability to travel up to 15% (CONUS/OCONUS).