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Arcfield · 4 weeks ago

Systems Administrator IV

Huntsville, AL

Full-time

Onsite

Senior Level, Lead/Staff

8+ years exp

Arcfield is a company focused on providing advanced solutions in systems administration and cybersecurity. They are seeking a Senior Systems Administrator to lead the installation and maintenance of Windows systems, manage Active Directory, and ensure compliance with security standards while providing technical mentorship to junior staff.

ConsultingManagement Consulting

Comp. & Benefits

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Lead installation, configuration, hardening, and sustainment of on-prem Windows systems, including Windows Server 2019/2022 and Windows 11, across multiple enclaves and classification levels in compliance with DISA STIGs and NIST 800-53

Architect, administer, and sustain Active Directory Domain Services, including domain and forest design, Domain Controller deployment and lifecycle management, replication, FSMO role management, backup and recovery, DNS, DHCP, time services, trust relationships, and cross-domain integration

Architect, implement, and sustain Group Policy architecture and lifecycle management, including GPO design, testing, deployment, troubleshooting, enforcement of security baselines, workstation hardening, and user, computer, and OU design aligned with least-privilege principles

Architect, operate, and sustain VMware vSphere and ESXi environments, including host lifecycle management, virtual networking, storage integration using NFS and/or vSAN, performance tuning, and fault recovery

Plan, integrate, and validate new systems and technologies in coordination with network, cybersecurity, and engineering teams while maintaining operational stability

Perform advanced system troubleshooting across operating systems, identity services, virtualization, and authentication layers in restricted or air-gapped environments

Execute vulnerability management activities, including Nessus and SCAP scanning, analysis of findings, remediation, and validation of compliance

Serve as the technical subject matter expert for Windows and VMware platforms only during RMF and ATO activities, assessments, inspections, and audits by providing technical responses and evidence artifacts within the systems under their responsibility

Develop, maintain, and enforce system documentation, security baselines, architecture diagrams, SOPs, and recovery procedures

Design, implement, and maintain backup, restore, disaster recovery, and continuity of operations strategies for enterprise systems and directory services

Provide technical leadership, mentorship, and oversight to junior system administrators to ensure adherence to standards and timely issue resolution

Ensure proper marking, handling, storage, and protection of classified systems and data in accordance with DoD policy

Qualification

Active Directory AdministrationWindows Server 2019/2022VMware vSphereESXiSystem HardeningVulnerability RemediationRMFATO ProcessesTroubleshooting Complex SystemsIAT Level II Certification