Senior Systems Administrator

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MANTECH seeks a highly motivated and customer-focused Senior Systems Administrator to join our team in Annapolis Junction, MD.

The Senior Systems Administrator will administer AWS cloud services, manage enterprise Windows and Linux environments, implement rigorous security controls, and automate recurring operational tasks across critical infrastructure. This role supports the Enterprise Infrastructure Services (EIS) organization, which oversees MPO’s Enterprise Information Technology (EIT)—delivering the backbone IT platform for a global workforce dedicated to the defense of our Nation.

Responsibilities include but are not limited to

Deploy, configure, and maintain Tenable Nessus Security Center and vulnerability scanners across enterprise networks.

Implement Ansible playbooks in Linux environments to automate administrative, maintenance, and operational tasks.

Develop, implement, and maintain automation scripts in PowerShell, Bash, and Python to streamline recurring systems administration and operational workflows.

Harden Windows and Linux operating systems in strict accordance with DISA STIGs, applicable security policies, and SELinux standards.

Maintain patch management infrastructure and repositories, including WSUS, YUM, BigFix libraries, McAfee ePO, and Red Hat Satellite servers.

Generate and analyze security vulnerability reports, remediate identified vulnerabilities, and manage enterprise endpoint security configurations.

Administer and troubleshoot core directory and infrastructure services, including Active Directory, Group Policy Objects (GPOs), DNS, DHCP, and SSL/TLS certificates.

The projected compensation range for this position is $128,000.00-$214,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.

In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at [email protected] and provide your name and contact information.