Senior Linux Systems Administrator

General information

Requisition #

R70546

Locations

USA-VA-Chantilly

Posting Date

09/03/2026

Security Clearance Required

TS/SCI w/ Poly

Remote Type

Onsite

Time Type

Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!

MANTECH seeks a motivated, mission-focused Senior Linux Systems Administrator to join our team in Chantilly, VA.

As a Linux Systems Administrator, you will help maintain and enhance the Sponsor's Linux environment alongside a talented team. You will be responsible for the operating system software and its seamless integration with hardware and applications across the organization.

Responsibilities include but are not limited to:

• Planning, testing, installing, integrating, and maintaining new and upgraded versions of the relevant operating systems
• Building and hardening Linux servers, and establishing configuration baselines while applying all appropriate security and firmware patches in a timely manner
• Developing test plans/procedures, managing operating system lifecycles, and designing interfaces to external systems
• Researching, troubleshooting, and resolving operating system problems efficiently by collaborating with application development and network teams
• Maintaining and updating complex documentation on the operating system configuration and all other areas of responsibility
• Demonstrating strong communication and collaboration skills to work effectively and proactively across a large organization of dispersed teams

Minimum Qualifications:

• High School Diploma/GED with 7+ years of Information Technology experience
• Progressively responsible experience configuring and maintaining Linux servers in a large, complex server environment
• Experience working in an organization with complex, intertwined systems, data flows, and applying security patches in a Linux environment
• Experience creating, maintaining, and communicating complex information technology documentation
• Experience with domain account management, particularly via Centrify, LDAP, and Active Directory
• Experience with shell scripting to automate administrative tasks

Preferred Qualifications:

• Experience scripting with Ansible or similar technologies
• Experience with the Sponsor's primary automation and configuration management tools
• Self-starter with excellent people skills - able to work across teams and drive change throughout an organization

Clearance Requirements:

• An active TS/SCI with Polygraph is required.

Physical Requirements:

• Must be able to remain in a stationary position 50% of the time to operate a computer and other office productivity machinery.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, and maintain computers in the lab, including under desks and in the server closet.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations and exchanging accurate information.

The projected compensation range for this position is $128,000.00-$214,400.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.