Senior Linux System and Network Administrator

Job Locations US-CO-Colorado Springs
# of Openings
Information Technology
Clearance Required


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Modern Technology Solutions, Inc. (MTSI) is seeking a Linux System and Network Administrator to manage classified lab systems.  


Why is MTSI known as a Great Place to Work?

  • Interesting Work:  Our co-workers support some of the most important and critical programs to our national defense and security.  
  • Values: Our first core value is that employees come first.  We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry. 
  • 100% Employee Ownership: we have a stake in each other's success, and the success of our customers.  It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.  
  • Great Benefits: 
    • Start at 20 days PTO/year + 10 holidays/year
    • Flexible schedules
    • 6% 401k match with immediate vesting
    • Semi-annual bonus eligibility (July and December)
    • Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
    • Up to $10,000 in annual tuition reimbursement
    • Other company funded benefits
    • Optional zero deductible Blue Cross/Blue Shield health insurance plan
  • Track Record of Success:  We have grown every year since our founding in 1993.

For additional company information, please visit:



  • Maintain Development LAN services including Jira, GitLab, Mattermost, Artifactory, and NextCloud
  • Manage user accounts across Linux-based DevLAN
  • Maintain, update, and secure services running on DevLAN
  • Create scripts to assist with system/network administration
  • Ensure periodic backups are being performed correctly
  • Enforce network security practices
  • Perform periodic updates to Linux distro
  • Maintain network and switch security
  • Manage lab resources across multiple different projects and changing priorities
  • Work with developers to ensure clear tasking to achieve project goals
  • Ensure approved RMF procedures are being complied with


  • Strong planning and organizational skills
  • Scripting using Bash, Python, etc.
  • Familiarity with Nginx and proxies
  • Experience with Docker, Docker compose, and Docker registries
  • Strong background in networking to include configuration of switch/router port security and VLANs
  • Experience with Git repositories and GitLab
  • Demonstrated ability to understand enterprise level systems
  • Demonstrated ability to shift from one project to another in an agile work environment

Qualifications Desired:

  • Strong problem-solving skills
  • Competence in software system design
  • Familiarity with SQL and database design
  • Management of Virtual Machines, VM Ware, and Virtual Box
  • Ability to manage GitLab, Jira, Mattermost, and Artifactory
  • Good understanding of RMF compliance process and implementation
  • Strong motivation to expand knowledge and skills
  • Ability to approach classical problems with new ideas and innovation

Education Requirements:

  • Associates degree in IT, Information Systems, Computer Science, or related field
  • Preferred - Bachelor's degree in IT, Information Systems, Computer Science, or related field

Clearance Requirements:

TS/SCI clearance.  (Only candidates who can be cleared to TS/SCI will be considered.)


Travel Requirements: 

Travel up to 10 percent of the time is required with durations ranging from overnight to several weeks.


Please Note: U.S. Citizenship is required for this position.






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