ManTech Sr. Systems Administrator in Colorado Springs, Colorado

The Senior Systems Administrator (Red Hat Enterprise Linux (RHEL)) acts as a subject matter expert for the Red Hat environment. Candidate should have a strong understanding of troubleshooting and configuration of Linux servers and workstations, to include protocols and switching, best-practice configurations, connectivity and networking concepts. A specific knowledge of RHEL systems administration concepts, practices and procedures and is required to be available for on-call mission support. They are expected to work on complex assignments and perform a wide range of RHEL system administration activities with little to no direct supervision. The RHEL administrator must be a self-starter and be able to work under aggressive deadlines. The candidate possesses familiarity with varied concepts, standard best business practices, and procedures. The ideal candidate can plan and execute tasks based on experience, judgment and independent research. The candidate reports to system administrator lead and performs the following:

  • Apply best practices where possible or engineer new best practices using innovative approaches as appropriate.

  • Analyze new and existing software; install, maintain, and customize vendor software.

  • Consult with internal and external users to identify and document user objectives.

  • Monitor system and application performance to detect errors; apply testing procedures/methodologies (e.g., diagnostic software) and provide interpretation of data.

  • Provide root-cause analysis for recurring or critical problems      


  • B.S. degree in computer science, information technology, or a related field, or equivalent experience.

  • 7-10+ years of RHEL systems administration experience, or equivalent experience

  • Experience with RHEL 7.X performance monitoring and tuning tools, installation options, problem determination and recovery, and security

  • Experience with IBM X-series and Flex System server technology.

  • Experience writing and debugging shell scripts in a standard UNIX shell

  • Required to be on-call and respond in a timely manner

Preferred Qualifications:

  • Experience with Satellite Server and Kickstart

  • Experience with RHEL performance tuning and capacity planning

  • Experience with high availability architectures and concepts (possibly including, but not limited to HACMP)

  • Experience with Virtual IOS concepts and applications

  • Experience with enterprise backup/restore architectures and concepts including Netbackup as it pertains to RHEL

  • Experience with Logical Volume Manager, Storage concepts and SAN provisioning


Bachelor's Degree, See Qualifications

Years of Experience

07-09 years w/Bachelors Degree, 08-10 years w/Bachelors Degree, 04-06 years w/Masters Degree, See Qualifications

Position Type





For more than 40 years, ManTech employees have been solving complex problems for the national security community. We are comprised of approximately 10,000 talented employees around the world. We adhere to the simple, no-nonsense values on which ManTech was founded more than four decades ago, aligning squarely with the mission objectives of our customers. As our customer base continues to expand and diversify, we continue to diversify our workforce and solutions. Half our employees have a military background, and more than 70 percent hold a government security clearance. As a leading provider of innovative technology services and solutions for the nation's defense, security, space, and intelligence communities; we hold nearly 1,000 active contracts with more than 40 different government agencies.

ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Waretime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law. If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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