Systems Administrator III – Multi‑Platform & Federal Cloud

About the role

We are seeking an experienced Systems Administrator III to support mission‑critical federal research and operational environments in the United States. The role combines hands‑on administration of multi‑platform infrastructure with cybersecurity and compliance responsibilities, ensuring high availability and resilience of critical services.

Key responsibilities

• Administer, configure, and upgrade enterprise UNIX/Linux, Windows, and macOS systems.
• Install software releases, apply patches, and troubleshoot multi‑platform issues.
• Implement security configurations aligned with FISMA, NIST 800‑53, and RMF.
• Perform backup, recovery, and contribute to enterprise backup architecture.
• Support network components such as DNS, DHCP, firewalls, VPNs, load balancers, and web services.
• Conduct vulnerability scanning and coordinate remediation.
• Assist with Assessment & Authorization (A&A) and RMF documentation.
• Maintain system documentation, operational procedures, and test plans.
• Monitor service tickets using tools like Graylog and BigFix, and respond to incidents.
• Support virtualization, containerization, and cloud infrastructure initiatives.
• Participate in on‑call rotations and provide mentorship to junior staff.

Required profile

• Bachelor’s degree in Computer Science, IT, or related field, or equivalent experience.
• 4‑6 years of enterprise systems administration in multi‑platform environments.
• Strong knowledge of federal cybersecurity frameworks and compliance processes.
• Ability to work collaboratively in a mission‑driven environment.

Required skills

• UNIX/Linux administration
• Windows administration
• macOS administration
• Shell scripting
• Graylog
• BigFix
• DNS, DHCP, firewalls, VPN, load balancing, web services
• Vulnerability scanning
• FISMA, NIST 800‑53, RMF
• Virtualization and containerization
• Cloud infrastructure