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60 Tenable System Administrator Jobs Hiring Near You

ManTech

Cloud System Administrator

Annapolis Junction, MD · On-site

$128K - $214K/yr

... ePO, Tenable Nessus agents and Bigfix Utilize automation and scripting tools like Salt, BASH ... Systems Administrator or Cloud Engineer supporting programs of similar scope and complexity.

Arcfield

System Administrator II

Rome, NY · On-site

Responsibilities Arcfield is seeking a Systems Administrator to perform network, hardware, and ... Tenable Nessus Vulnerability Scanner Software * Windows Server Update Service (WSUS) * Kubernetes ...

Peraton

Linux Systems Administrator

Silver Spring, MD · On-site

$86 - $138/hr

Perform continuous monitoring of systems using vulnerability scanning tools like Tenable Nessus ... Linux System Administration * Deploy, configure, maintain, and secure Linux‑based servers and ...

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Infographic showing various System Administrator job openings at Tenable in the United States as of August 2026, with employment types broken down into 100% Full Time. Highlights an 23% Physical, 18% Hybrid, and 59% Remote job distribution.

System Administrator Lead

Radiance Technologies

Huntsville, AL • On-site

Full-time

Medical, Dental, Vision, Life, Retirement

This job post has expired 2 days ago. Applications are no longer accepted.

Job description

Radiance Technologies is an employee-owned company with benefits that are unmatched by most companies in the Huntsville AL area. Employee ownership, generous 401K, full health/dental/life/vision insurance benefits, interesting assignments, educational reimbursement, competitive salaries, and a pleasant work environment combine to make Radiance Technologies a great place to work and succeed.
Radiance is searching for an experienced Systems Administrator Lead to provide support to critical computer systems and network infrastructure at the corporate facility. The qualified candidate will provide design, maintenance, sustainment, and enhancement support for the architecture in a classified environment; ensure compliance with applicable information assurance requirements; ensure 24/7 continuity of operations; and create and update relevant system documents. Work hours are normal business hours, however, occasional support during non-business hours may be required.
Successful candidates will have the following behavioral competencies:
  • Great attitude with high degree of customer focus.
  • Flexible and adaptable to changing priorities.
  • Solid trouble-shooter, problem solver.
  • Reliable and committed to getting the job done (including after hours as required).
  • Excellent coping skills and the ability to juggle multiple priorities.
  • Self-managed; able to work independently or with a team as well as the leadership skills necessary to lead a group of technical team members as required.
  • Able to be objective and receive input from specialized team members according to their areas of expertise.

Job Responsibilities:
  • Provide daily, on-site, support for the operations and maintenance of systems across multiple classification level environments as needed.
  • Provide mentorship to junior System Administrators.
  • Overseeing the technical implementation posture of the information system for the assigned location, in accordance with information assurance compliance requirements.
  • Manages the Information Assurance IT personnel such as System Administrators and oversees tasking.
  • Aid in the establishment of hardware and software standards.
  • Assist in developing and automating technical solutions.
  • Reviews compliance documents such as policies, procedures, etc. to ensure IA corporate directives are met and technical compliance requirements are enforced.
  • Engage with management on performance planning, technical matters, and serves as POC for technical issue root cause analysis.
  • Assist in maintaining and documenting technical standards.
  • Disseminate IA documentation, policies, and procedures as required.

Required Experience
  • Minimum seven (7) years of experience as a System Administrator performing the patching, installation, configuration, maintenance, and flaw remediation of servers, workstations, and other computer components in accordance with all applicable STIGs on a classified network.
  • A minimum of three (3) years of experience with Linux administration (Red Hat, Ubuntu, CentOS, etc.).
  • Excellent written and verbal communication skills and ability to effectively interface with numerous cognizant security agencies, customers, and senior management.
  • Demonstrated experience deploying and managing multiple networks in a dynamic, demanding air-gapped classified environment.
  • Working knowledge of WAN/LAN, to include Cisco-based routers, switches, and firewalls
  • Work with software development groups to setup and maintain standalone and centralized Linux applications such as Matlab, Python-based applications, GitLab, Jenkins, and Kubernetes.
  • Experience in User account and access control management (Active Directory, LDAP, User Access Control) in a domain or stand-alone environment.
  • Demonstrated experience with integrating Linux workstations and servers with Windows Active Directory.
  • Experience with configuring and executing SIEM tools (e.g. Splunk, ELK), vulnerability management tools (Tenable Nessus), Network Storage devices (e.g. NetApp, Synology, etc.), monitoring tools (e.g. Wireshark, Snort, PRTG, etc.), and compliance tools (e.g. SCAP, SCC Tool, OpenSCAP, etc.).
  • Experience with providing backup and recovery services; manage file systems and disk space.
  • Experience with log aggregation technologies allowing for the collection and filtering of Linux syslog and audit trails.
  • Experience with desktop and server virtualization using VMWare vSphere and EXSI.
  • Ability to gain comprehension of new technologies to assist with new requirement implementation efforts.

Required Skills
  • Minimum of a valid Secret clearance with in-scope background investigation date.
  • Candidates must be able to pass a Top-Secret SCI background check and be able to pass a Counter-intelligence polygraph.
  • DoD Directive 8570 / 8140 Information Assurance Technical (IAT) Level II certification.

(e.g., Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP)
Desired Qualifications
  • Prior experience leading System Administrators at an organization of similar size and complexity.
  • Understanding of network concepts and Type 1 encryption devices, such as TACLANE.
  • Experience configuring and securing network equipment (switches and firewalls).
  • Basic knowledge of Risk Management Framework such as DAAPM, JSIG, and NIST/DFARS compliance security controls requirements and how they impact the IT configuration requirements for Windows and Linux systems.
  • Capable of scripting or programming to automate tasks.
  • Background in utilizing Red Hat Satellite, Ansible, and other Linux orchestration tools.
  • Current Red Hat Certified Systems Administrator (RHCSA) or other advanced Linux systems administrator certifications.

Radiance Technologies is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.

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