Beavercreek, OH · On-site
$69K - $125K/yr
Description Leidos Corporate Information Security Office (CISO), reporting through the Digital ... using Tenable Nessus . If you're looking for comfort, keep scrolling. At Leidos, we outthink ...
Beavercreek, OH · On-site
$69K - $125K/yr
Description Leidos Corporate Information Security Office (CISO), reporting through the Digital ... using Tenable Nessus . If you're looking for comfort, keep scrolling. At Leidos, we outthink ...
$69K - $125K/yr
Leidos Corporate Information Security Office (CISO), reporting through the Digital sector, is ... using Tenable Nessus . If you're looking for comfort, keep scrolling. At Leidos, we outthink ...
$69K - $125K/yr
Leidos Corporate Information Security Office (CISO), reporting through the Digital sector, is ... using Tenable Nessus . If you're looking for comfort, keep scrolling. At Leidos, we outthink ...
$13.25 - $16.58
17% of jobs
$17.44 is the 25th percentile. Wages below this are outliers.
$16.58 - $19.90
32% of jobs
The median wage is $20.17 / hr.
$19.90 - $23.23
20% of jobs
$25.54 is the 75th percentile. Wages above this are outliers.
$23.23 - $26.55
9% of jobs
$26.55 - $29.88
5% of jobs
$29.88 - $33.20
6% of jobs
$33.20 - $36.52
3% of jobs
$36.52 - $39.85
4% of jobs
$39.85 - $43.17
1% of jobs
$43.17 - $46.50
1% of jobs
$46.50 - $49.82
1% of jobs
$13
$24
$49
A key challenge for Tenable Security professionals is staying ahead of constantly evolving cyber threats and adapting to new vulnerabilities as they surface. The role often requires balancing thorough vulnerability assessments with the need to minimize operational disruptions for IT and business teams. In addition, effectively communicating technical findings to non-technical stakeholders can be demanding but is essential to prompt remediation efforts. Strong analytical skills and persistent learning are important to successfully navigate these challenges and deliver effective organizational protection.
A Tenable Security job typically involves working with Tenable's cybersecurity tools, such as Nessus, Tenable.io, or Tenable.sc, to identify and manage vulnerabilities in an organization's network. Professionals in this role analyze security risks, conduct vulnerability assessments, and help implement risk mitigation strategies. They may work in roles such as security analysts, engineers, or consultants, ensuring compliance with cybersecurity best practices. Strong knowledge of vulnerability management, network security, and industry regulations is often required.
To thrive in a Tenable Security Engineer role, you need expertise in vulnerability assessment, network security, and risk management, usually paired with a degree in cybersecurity, computer science, or a related field. Proficiency with Tenable’s suite of security tools (such as Nessus, Tenable.io, or Tenable.sc), knowledge of security frameworks, and certifications like CISSP or CompTIA Security+ are highly valued. Strong analytical thinking, communication, and problem-solving skills help professionals collaborate across teams and clearly present findings. These capabilities are crucial for proactively identifying and mitigating vulnerabilities, ensuring organizations maintain a robust security posture.
$69K - $125K/yr
Full-time
Medical, Retirement, PTO
Re-posted 10 days ago
8.3
Based on 151 frontline employees who took The Breakroom Quiz
76th of 485 rated business services
Description
Leidos Corporate Information Security Office (CISO), reporting through the Digital sector, is seeking a Linux and Windows System Administrator to support and maintain complex classified environments. The selected candidate will be responsible for administering, securing, troubleshooting, and maintaining Windows and Linux systems across physical and virtual infrastructures. This role supports mission-critical operations by ensuring system availability, compliance with security requirements, and reliable day-to-day operations within a secure enterprise environment.
Location: All work will be performed onsite in our Beavercreek, OH office.
Clearance: You must currently carry an active DoD Secret clearance to qualify for consideration.
Primary Responsibilities
Administer and maintain Windows Workstations, Windows Server, and Linux systems (RHEL, Rocky Linux, Ubuntu) across physical, virtual, and air-gapped environments.
Perform Tier 2 incident resolution, troubleshoot technical issues, conduct root-cause analysis, and collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
Execute system patching, vulnerability remediation, configuration management, and compliance activities.
Implement and maintain monitoring, logging, backup and recovery solutions, and operational documentation/runbooks.
Support account and access administration in accordance with least-privilege principles and organizational security policies.
Automate repetitive administrative tasks using PowerShell, Bash, Ansible, or similar automation tools.
Deploy and maintain operating system images using PXE/network boot, Kickstart, disk imaging, answer files, and automated installation methods.
Perform system hardening and security compliance using DISA STIGs, SCAP, and NIST 800-53 security controls.
Administer and troubleshoot Active Directory, DNS, DHCP, file servers, virtualization platforms, and Layer 2 network switching, including VLAN configuration, TCP/IP connectivity, and switch port administration in an air-gapped environment.
Support dual-boot bare-metal systems and virtualized environments.
Participate in after-hours support and on-call rotations as required.
Research, analyze, and resolve Windows, Linux, and networking issues to maintain system availability, reliability, and performance.
Basic Qualifications
Current Active DoD Secret security clearance.
Current CompTIA Security+ certification.
Bachelor's degree in a technical field with 2–4 years of relevant experience. Additional years of experience may be considered in lieu of a degree.
Experience administering Windows Server and Linux systems in secure or air-gapped environments.
Experience implementing DISA STIGs, SCAP, NIST 800-53 security controls, and system hardening practices.
Experience administering:
Active Directory
DNS
DHCP
File Servers
Experience building, integrating, maintaining, troubleshooting, and remediating Windows and Linux systems.
Experience deploying operating systems using PXE, Kickstart, ISO/disk imaging, and automated installation methods.
Experience configuring and troubleshooting Layer 2 switching, VLANs, TCP/IP, and network connectivity.
Experience managing Windows and Linux updates, patching, and vulnerability remediation.
Ability to develop automation scripts using PowerShell and Bash.
Familiarity with Linux software repository management.
Ability to work independently and collaboratively with minimal supervision.
Strong analytical, communication, and problem-solving skills.
Preferred Qualifications
Red Hat Certified System Administrator (RHCSA) certification.
Experience administering VMware, Hyper-V, or other virtualized environments.
Experience with automation and configuration management tools, including Ansible.
Experience supporting secure or classified DoD environments.
Knowledge of backup, recovery, logging, and monitoring solutions.
Experience performing DISA STIG remediation, SCAP compliance validation, and vulnerability scanning using Tenable Nessus.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting:July 2, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
About Leidos
Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.
Pay and Benefits
Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to Non-Discrimination
All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
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At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable practices. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.
It services
10,000+ Employees
Reston, VA, US
