MANTECH · 2 hours ago
Senior Systems Administrator - Windows/Linux Dual-Stack Specialist
Fairmont, WV
Full-time
Onsite
Mid, Senior Level
4+ years expMANTECH seeks a motivated and customer-oriented Senior Systems Administrator - Windows/Linux Dual-Stack Specialist to join their team. This role is critical for maintaining the stability, integrity, and security of a high-impact large scale enterprise network infrastructure, focusing on both Windows and Linux environments.
Cyber SecurityInformation TechnologySecurityTelecommunications
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Provide expertise in the full lifecycle management of Windows Server environments. This includes building, configuring, patching, and hardening Windows Server installations (e.g., 2019/2022) from bare-metal or virtual templates to meet all Federal Information Security Management Act (FISMA) High requirements
Design, deploy, and maintain complex Active Directory (AD) forests, domains, trusts, and replication topologies. Expertly manage Group Policy Objects (GPOs), DNS, DHCP, and Public Key Infrastructure (PKI) services. Manage and maintain virtualized environments (VMware vSphere/ESXi, Hyper-V) and support the administration of cloud platforms (e.g. Azure, AWS, Google, etc) utilized by the team
Manage and enforce privileged access management (PAM) solutions, user accounts, service accounts, and resource permissions in strict accordance with government security policies
Utilize scripting languages (e.g., Python, Bash, PowerShell) and configuration management tools (e.g., Ansible, Puppet) to automate repetitive tasks, configuration baselines, and deployment pipelines across both Windows and Linux environments
Lead efforts to integrate Linux systems into the overall IT architecture and support the migration of services and functions away from Windows platforms
Qualification
Required
Bachelor's degree and 4+ years of experience in Systems Administration, with demonstrated expertise in both Windows Server and Enterprise Linux environments
Expert-level, hands-on experience in building, securing, and troubleshooting Windows Servers from scratch and designing complex Active Directory environments
Senior-level experience with Linux system administration, networking, security hardening, and scripting/automation tools
Proven working knowledge of U.S. Federal Government cybersecurity compliance standards, including FISMA, NIST Special Publications (especially 800-53/800-171), and Continuous Diagnostics and Mitigation (CDM) practices
Must be a U.S. Citizen and have a current/active Secret Security clearance
Must be able to remain in a stationary position 50%
Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer
Preferred
Microsoft Certified Systems Administrator/Engineer (MCSA/MCSE) or equivalent (e.g., Azure Administrator)
Red Hat Certified Engineer (RHCE) or equivalent advanced Linux certification
CompTIA Security+ (or higher, e.g., CISSP, CISM, CASP+)
Experience with container technologies such as Docker, Kubernetes, and/or OpenShift
Experience with enterprise tools such as Tenable and Microsoft System Center Configuration Manager (SCCM) or Microsoft Endpoint Configuration Manager (MECM)
Company
MANTECH
ManTech is a technology company that offers cyber, IT, and data analytics technologies and solutions for security programs.
5001-10000 employees
Funding
Current Stage
Public CompanyTotal Funding
unknown2022-05-16Acquired
2002-02-07IPO
Leadership Team
Matt Tait
Chief Executive Officer & President
Gavin Greene
VP of Business Development
Recent News
2026-01-16
Washington Technology
2025-12-11
GlobeNewswire
2025-12-10
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