Linux System Administrator

General information

Requisition # R62237 Locations USA-CO-Aurora Posting Date 08/07/2025 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 is seeking a Linux System Administrator to join our team in Southlands, Colorado. This position supports the ELINT Modernization effort and is part of a collaborative team delivering systems engineering, software development, testing, and configuration management services.
 

Responsibilities include, but are not limited to:

• Support implementation, troubleshooting, and maintenance of IT systems
• Manage IT infrastructure and ensure system availability and performance
• Perform day-to-day system monitoring, operations, and problem resolution
• Diagnose and resolve issues at Tier 1 and Tier 2 support levels
• Configure and manage UNIX/Linux operating systems and install/load OS software
• Optimize system operations and perform resource utilization and capacity analysis
• Perform system backups, disaster recovery, and service restoration procedures
• Update and migrate servers to newer software versions
• Create and maintain system documentation, user manuals, schedules, and update logs
• Implement OS enhancements to improve system reliability and performance

Minimum Qualifications:

• Bachelor's degree with 15+ years of related experience; an additional 5 years of related experience might be substituted for a degree
• Security+ certification is required
• Experience with troubleshooting and maintaining enterprise IT systems
• Experience managing and optimizing UNIX/Linux environments (installation, patching, performance tuning)
• Experience with performing system configuration and daily operations
   

Preferred Qualifications:

• Experience with some or all of the following technologies and environments:
• Operating Systems: CentOS, AIX, Solaris, RHEL
• Tools & Platforms: NiFi, Docker, Putty, VMWare, OpenStack, Cisco
• Orchestration & Development: Kubernetes, Tibco, ClearCase, Git, Ratchet
• Agile development methodologies
• Atlassian tool suite (JIRA, Confluence)
• Working within integrated software development environments
   

Security Clearance Requirements

• Current TS/SCI with Polygraph
   

Physical Requirements

• Must be able to remain in a stationary position for up to 50% of the time
• Frequently operates computers and standard office productivity tools
• Must be able to effectively communicate with co-workers, customers, and leadership—may include delivering presentations
• Occasional travel may be required for hardware upgrades and updates

The projected compensation range for this position is $114,100.00-$191,100.00. 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 International Corporation 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.