Systems Administrator IV

Arcfield was purpose-built to protect the nation and its allies through innovations in digital transformation, space mission engineering and launch assurance, miniaturized sensors and satellites, advanced modeling and simulation, cybersecurity, and conventional and hypersonic missile support. Headquartered in Chantilly, VA with 16 global offices, Arcfield employs more than 1,500 engineers, analysts, IT specialists, and other professionals with more than 60 years of collective proven experience supporting missions in cyber and space defense, space exploration, hypersonic and nuclear deterrence and warfighter readiness. Visit arcfield.com for more details.

• Lead installation, configuration, hardening, and sustainment of Windows (Windows 10, Server 2016/2019/2022) and Linux (Ubuntu, Red Hat, CentOS) systems across multiple enclaves and classification levels, in accordance with NIST 800-53, DFARS, and DISA STIG/SRG standards.
• Architect, secure, and maintain enterprise-class virtualization environments (VMware vSphere, ESXi), storage solutions (NetApp), and SIEM/monitoring tools.
• Plan, integrate, and validate new technologies, coordinating with engineering and cybersecurity teams to meet evolving mission requirements.
• Serve as a technical SME during assessments, inspections, and RMF/ATO-related activities; provide audit responses and evidence packages.
• Perform advanced vulnerability management, to include scanning (Nessus, SCAP), analysis, and remediation across complex, air-gapped environments.
• Direct user account management and access control across Active Directory, LDAP, and enterprise authentication services, including cross-domain solutions.
• Develop and maintain system documentation, security baselines, architecture diagrams, and SOPs for continuity and compliance.
• Provide leadership, mentorship, and oversight to junior system administrators, ensuring adherence to processes and timely issue resolution.
• Coordinate with program leadership to design, implement, and enforce system sustainment strategies, disaster recovery, and continuity of operations plans.
• Ensure proper marking, handling, and storage of classified materials in compliance with DoD standards.

Required:

• Bachelor's degree in Computer Science, Information Systems, Engineering, or related discipline. BS 8-10, MS 6-8, PhD 3-5 of experience
• Must possess and be able to maintain a Secret clearance
• At least 3 years supporting classified environments.
• DoD 8570/8140 IAT Level II certification (e.g. Security+ CE, etc.).
• Demonstrated experience leading system administration in secure, standalone, and multi-domain environments.
• Advanced expertise in virtualization, storage, networking, cybersecurity, and cross-domain solutions.
• Strong knowledge of RMF, JSIG, DAAPM, and DoD cybersecurity controls, with proven experience in supporting ATO submissions.

Desired:

• Master's degree in Computer Science, Information Systems Management, or closely related field.
• Hands-on experience with SIEM solutions, endpoint security tools, IDS/IPS, and forensic analysis.
• Experience with cloud security and hybrid architectures (AWS GovCloud, Azure Government).
• Familiarity with mission support systems in test and evaluation or range operations environments.
• Demonstrated leadership in mentoring, team building, and cross-discipline collaboration.

We are an equal opportunity employer and federal government contractor. We do not discriminate against any employee or applicant for employment as protected by law.