Senior Systems Administrator - Cloud, Automation & Security

MANTECH; Maryland; On-site; USD 120,000 - 150,000; Full time

Job summary

MANTECH seeks a highly motivated Senior Systems Administrator to join our team in Annapolis Junction, MD. The role administers AWS cloud services and enterprise Windows/Linux environments, implements strong security controls, and automates recurring tasks across critical infrastructure.

Responsibilities include deploying vulnerability scanners, building Ansible playbooks, and developing automation in PowerShell, Bash, and Python.

Qualifications

• Bachelor’s degree in Systems Engineering, Computer Science, Information Systems or a related field.
• DoD 8570/8140 IAT Level II certification or obtain within 60 days.
• Hands-on experience with Windows Server and Linux administration.

Responsibilities

• Deploy, configure, and maintain Nessus Security Center and scanners.
• Develop Ansible playbooks for Linux automation.
• Create automation scripts in PowerShell, Bash, and Python for operations.
• Harden Windows and Linux with DISA STIGs and SELinux.
• Maintain patch management repos (WSUS, YUM, BigFix, ePO, Red Hat Satellite).
• Manage Active Directory, GPOs, DNS, DHCP, and SSL/TLS certificates.

Skills

AWS Cloud

Windows Admin

Linux Admin

Scripting

Education

Bachelor’s degree in a related field

Tools

Ansible

PowerShell

Bash

Python

Tenable Nessus

WSUS

BigFix

Red Hat Satellite

Job description

MANTECH seeks a highly motivated Senior Systems Administrator to join our team in Annapolis Junction, MD. The role administers AWS cloud services and enterprise Windows/Linux environments, implements strong security controls, and automates recurring tasks across critical infrastructure.

Responsibilities include deploying vulnerability scanners, building Ansible playbooks, and developing automation in PowerShell, Bash, and Python.