Systems Administrator III

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Systems Administrator III in United States.

This is an opportunity for an experienced systems administrator to support mission-critical federal research and operational environments. In this role, you will manage and optimize multi-platform infrastructure spanning UNIX/Linux, Windows, and macOS systems while ensuring high availability, security compliance, and operational resilience. You will play a key role in supporting scientific and national-scale network programs, contributing to cloud, virtualization, and enterprise systems initiatives. The position combines hands-on technical administration with cybersecurity responsibilities, including vulnerability management and federal compliance alignment. Working in a highly collaborative and mission-driven environment, you will also support incident response, system modernization, and infrastructure improvements. This role is ideal for a professional who thrives in complex environments where reliability, security, and continuous improvement are essential.

• Administer, configure, maintain, and upgrade enterprise systems across UNIX/Linux, Windows, and macOS environments, ensuring stability and performance.
• Install software releases, apply system patches, and troubleshoot technical issues across multi-platform infrastructure.
• Manage system security configurations in alignment with Federal cybersecurity frameworks, including FISMA, NIST 800-53, and RMF requirements.
• Perform system backup, recovery operations, and contribute to enterprise backup architecture planning and data integrity assurance.
• Support network and infrastructure components including DNS, DHCP, firewalls, VPNs, load balancing, and web services.
• Conduct vulnerability scanning and coordinate remediation efforts in accordance with security policies and compliance standards.
• Support Assessment & Authorization (A&A) processes and Risk Management Framework (RMF) documentation and activities.
• Maintain system documentation including operational procedures, design specifications, and test plans.
• Monitor, triage, and resolve service tickets while maintaining logs and system visibility using tools such as Graylog and BigFix.
• Support virtualization, containerization, and cloud infrastructure environments, contributing to system scalability and modernization.
• Participate in on-call rotations and respond to critical incidents to ensure continuity of operations.
• Assist with IT asset management, inventory tracking, and infrastructure lifecycle planning.
• Provide guidance and mentorship to junior systems administration staff as needed.

Requirements:

• Bachelor’s degree in Computer Science, Information Technology, or a related field, or equivalent professional experience.
• 4–6 years of enterprise systems administration experience in multi-platform environments.
• Strong proficiency in UNIX/Linux systems administration, including shell scripting and command-line tools.
• Extensive experience with Windows Server administration, Active Directory, and desktop environments.
• Solid understanding of networking fundamentals including TCP/IP, DNS, DHCP, VPNs, and firewall configuration.
• Experience with patch management, system hardening, vulnerability scanning, and security best practices.
• Familiarity with Federal cybersecurity frameworks such as FISMA, NIST 800-53, and RMF compliance requirements.
• Experience with enterprise backup and recovery tools such as Druva or equivalent platforms.
• Ability to manage complex technical environments independently and make sound operational decisions.
• Strong troubleshooting, analytical, and problem-solving skills in high-availability environments.
• Excellent communication skills and ability to collaborate with technical and non-technical stakeholders.
• U.S. citizenship or authorization to work in the United States and ability to obtain and maintain a Public Trust clearance.
• Experience with virtualization (VMware, KVM), containerization (Docker, Kubernetes), or cloud platforms is a plus.
• Familiarity with tools such as Jamf Pro, BigFix, Graylog, PDQ, Jira, or ServiceNow is highly desirable.

Benefits:

• Competitive annual salary of $115,000.
• Comprehensive health, dental, and vision insurance coverage.
• Paid time off and sick leave.
• 401(k) retirement plan with company match.
• Health Savings Account (HSA) and Flexible Spending Account (FSA) options.
• Life insurance and short- and long-term disability coverage.
• Pet insurance and wellness program initiatives.
• Flexible work arrangements and hybrid support where applicable.
• Exposure to mission-critical federal infrastructure and research environments.
• Professional development and opportunities for technical growth.
• Inclusive and equal opportunity workplace culture.