Leidos-Dynetics, within our Corporate Information Security Office (CISO and reporting through our Digital Modernization sector, is seeking a motivated Linux Systems Administrator to become a part of our team. In this role, you will be responsible for ensuring the secure and efficient operation of various information systems. This includes conducting regular vulnerability scans and implementing Security Technical Implementation Guides (STIGs) to maintain regulatory compliance. Mastery of Linux, networking, and Windows is critical for success in our diverse technological environment. Furthermore, effective communication with stakeholders and collaboration with cross-sector teams will be necessary to achieve organizational objectives.
At Leidos-Dynetics, we recognize the value of having a high-performing workforce and are committed to providing opportunities for employees by encouraging career growth and movement across the enterprise. We view career development as a partnership between employees, managers, and the company with a focus on building skills and experiences through internal mobility. To support career development, we offer a variety of resources in addition to training and educational opportunities within an inclusive environment.
Location: All work will be performed on-site in our Huntsville office.
Clearance: You must hold a current Top Secret clearance to qualify for consideration.
What We Value:
We're not just looking for expertise; we value a positive attitude, adaptability to changing priorities, and a commitment to delivering results. Our ideal candidate is a reliable troubleshooter, adept at handling multiple priorities with excellent coping skills. Whether working independently or collaboratively, you're self-managed and customer-focused.
Key Responsibilities:
Perform system design and new hardware/software implementation.
Maintain Linux, Network devices, and Windows endpoints.
Keep information systems compliant and aligned with DOD standards.
Coordinate with the Information assurance team to meet compliance.
Manage privileged access management.
Ensure the proper marking, handling, and storage of classified materials.
Maintain Baseline configuration of various information systems.
Work on multiple projects, leading projects that fall within the Area of responsibility.
Adopt new technologies and ensure that all staff members are trained to keep them compliant.
Maintain a robust virtual and physical environment.
Experience and Skills:
Bachelors degree coupled with a minimum of eight (8) years of System Administration experience. Equivalent relevant work experience may be considered in lieu of a degree.
Minimum of 4+ years administering Linux operating systems.
Currently hold active DoD Top Secret clearance.
DoD Directive 8570 / 8140 Information Assurance Technical (IAT) Level II certification. (Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP)
Demonstrate ability to manage multiple networks in a dynamic, demanding environment.
Possess familiarity with Risk Management Framework requirements for Windows Systems, Linux Systems, and network Devices.
Demonstrate ability to interface effectively with security agencies, customers, and management.
Strong written and verbal communication skills.
Preferred Qualifications:
Previous experience maintaining networks in classified environments.
Understanding of network concepts, Type 1 encryption devices (e.g., TACLANE), and cybersecurity tools.
Knowledge of VOIP.
Experience with Ansible.
RHCSA (Red Hat Certified System Administrator)
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 9, 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.
Skills Required
- Bachelor's degree plus a minimum of eight (8) years of System Administration experience (or equivalent relevant work experience).
- Minimum of 4+ years administering Linux operating systems.
- Currently hold an active DoD Top Secret clearance.
- DoD Directive 8570 / 8140 IAT Level II certification (e.g., Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP).
- Experience maintaining Linux, network devices, and Windows endpoints.
- Familiarity with Risk Management Framework (RMF) requirements for Windows systems, Linux systems, and network devices.
- Experience performing vulnerability scans and implementing Security Technical Implementation Guides (STIGs) to maintain DoD compliance.
- Experience managing privileged access management and baseline configuration of information systems.
- Ability to properly mark, handle, and store classified materials.
- Strong written and verbal communication skills and ability to interface with security agencies, customers, and management.
- Previous experience maintaining networks in classified environments.
- Understanding of network concepts and Type 1 encryption devices (e.g., TACLANE).
- Knowledge of VOIP technologies.
- Experience with Ansible.
- RHCSA (Red Hat Certified System Administrator) certification.
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
