Senior Systems Administrator

• Lead and manage full lifecycle of IT projects to ingest independently working research groups to a modern, centralized network.
• Administer and maintain virtualized environments primarily on Nutanix AHV and/or VMware ESXi.
• Design, implement, and support complex infrastructure solutions in both production and multitenant environments.
• Manage and secure Red Hat Enterprise Linux systems with advanced tooling such as Satellite, Identity Management (IDM), and Ansible Automation.
• Perform advanced troubleshooting and performance tuning across operating systems, virtualization platforms, and networked systems.
• Collaborate with networking teams to ensure seamless integration between systems and Cisco/Dell-based infrastructure.
• Automate system tasks and administrative processes using advanced PowerShell and/or Bash scripting.
• Manage enterprise systems monitoring and management platforms, including SolarWinds, Elastic Stack, and Veeam.
• Support and maintain enterprise storage platforms, with Dell PowerScale experience considered a strong plus.
• Participate in planning and execution of patching, backup, and disaster recovery operations.
• Provide input on security posture improvements and assist in audit or compliance readiness efforts.
• Establish, document, and manage scalable IT support and helpdesk operations aligned to mission requirements.
• Develop detailed project plans, roadmaps, and resource allocations. Work with MTSI project leadership to communicate these to government stakeholders.
• Monitor project progress, performance, and adherence to cybersecurity and compliance requirements (e.g., RMF).
• Work cross-functionally to ensure alignment with cybersecurity controls, accreditation boundaries, and sustainment expectations.
• Drive implementation of DoD-compliant IT architectures, including CDS, CSfC, and related classified communications solutions.
• Coordinate stakeholder communication and reporting, including some executive-level briefings.
• Support security audits and respond to findings related to program execution.

• Minimum 10 years of progressive systems administration experience in Linux and/or Windows environments
• Minimum of 10 years of experience in IT project management with at least 5 years managing DoD classified IT programs.
• Nutanix AHV support highly desired, VMWare ESXi experience can be a substitute
• Active TS/SCI clearance is required.
• Demonstrated experience delivering large-scale IT infrastructure deployments and data center projects.
• Strong knowledge of DoD security and compliance frameworks, especially RMF, STIGs, and cybersecurity controls.
• Experience building and optimizing IT support models, including helpdesk tiering and escalation processes.
• Experience with cross-domain solutions (CDS) and Commercial Solutions for Classified (CSfC) architectures.
• Familiarity with classified environments, including system authorization boundaries and IA considerations.
• Exceptional communication and leadership skills, with the ability to engage technical and non-technical stakeholders.

• Nutanix Certified Professional (NCP)
• VMware VCP (any version)
• Red Hat Certified System Administrator (RHCSA) or higher
• Cisco or Dell networking certifications (e.g., CCNA, D-Networking)
• ITIL v4 Foundation certification or higher.

• Strong knowledge of Red Hat systems including Satellite, IDM, and automation with Ansible
• Proficiency in enterprise virtualization, ideally with Nutanix AHV; VMware ESXi acceptable
• Hands-on experience supporting Cisco and Dell switching and routing technologies
• Demonstrated experience in developing support SOPs, ticket workflows, and training lower-tier support
• Practical experience with monitoring and management tools such as SolarWinds, Elastic, Veeam, and BigFix
• Strong scripting skills using PowerShell and/or Bash for task automation and configuration management
• Exposure to multitenant, high-availability, and secure computing environments
• Familiarity with Dell PowerScale (Isilon) storage systems
• Experience with Everfox (formerly Forcepoint) products Trusted Gateway System (TGS), High Speed Guard, TTC/TTC-R, and Commercial Solutions for Classified (CSfC).
• Hands-on knowledge of project documentation and configuration management tools (e.g., Jira, Confluence, MS Project).
• Agile/Scrum methodology familiarity or certification is a bonus.

• 
  
  
  
  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 Owned:
  
  
  
  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 - Most Full-Time Staff Are Eligible for:
  
  
  




• 
  Starting PTO accrual of 20 days PTO/year + 10 holidays/year
  
• 
  Flexible schedules
  
• 
  6% 401k match with immediate vesting
  
• 
  Semi-annual bonus eligibility (July and Decemeber)
  
• 
  Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
  
• 
  Up to $10,000 in annual tuition reimbursement
  
• 
  Other company funded benefits, like life and disability insurance
  
• 
  Optional zero deductible Blue Cross/Blue Shield health insurance plan
  




• 
  
  
  
  Track Record of Success:
  
  
  
  We have grown every year since our founding in 1993.
  
  

Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance

MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.

For more information about MTSI, please visit www.mtsi-va.com