New

Senior System Administrator

Modern Technology Solutions, Inc.
401(k)
United States, Ohio, Dayton
Mar 25, 2026
MTSI is seeking an experienced Senior Systems Administrator to support a large-scale digital transformation initiative with our AFRL customer at Wright-Patterson AFB. You will lead the technical execution of a complex IT infrastructure project as it transitions from concept to production. This role will play a key role in the architecture, management, and security of enterprise IT infrastructure with a focus on virtualization, automation, and Linux systems. This position requires advanced experience with Red Hat technologies, Nutanix or VMware platforms, and network integration in multitenant environments. This role requires deep understanding of DoD-specific IT environments, including the RMF process, cybersecurity standards, and managing classified IT projects. This role will work directly with the gaining organization to ensure a smooth transition of the environment into a larger ecosystem. Candidates should have a proven record of delivering high-impact IT projects within classified DoD environments, including the integration of cross-domain solutions (CDS), TTC/TTC, High Speed Guards, and Trusted Gateway Systems. Experience with Everfox (formerly Forcepoint) products is highly desirable. This position is based at WPAFB. The ideal candidate is resourceful, highly organized, capable of working independently, and thrives in a dynamic, team-oriented environment with ever-evolving priorities. You'll be a great fit for this role if: You have a passion for aerospace, defense, and space systems and advanced technologies. You understand the urgent need to modernize our defense systems and give our troops the best possible tools. Paying attention to detail and providing excellent customer service in a professional environment is a skill you excel at. You are passionate about continuous learning and growth, and you seek opportunities to challenge yourself. You are driven to make a meaningful impact through your work. Responsibilities:* Your essential job functions will include but may not be limited to: 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. 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. Work cross-functionally to ensure alignment with cybersecurity controls, accreditation boundaries, and sustainment expectations. Qualifications Required:* Minimum 10 years of progressive systems administration experience in Linux and/or Windows environments Nutanix AHV support highly desired, VMWare ESXi experience can be a substitute 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 with cross-domain solutions (CDS) 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. Proficiency with installing and updating SCAP Compliance Checker (SCC), ACAS Suite, and/or other configuration management or vulnerability scanning tools. Education: Bachelor's degree in an IT-related field (e.g., cybersecurity, computer science, computer engineering). Experience may be considered in lieu of a degree. Certifications: CompTIA Security+, Nutanix Certified Professional (NCP), VMWare VCP, RedHat Certified System Administrator (RHCSA) Even better if you have these desired skills:* Strong knowledge of Red Hat systems including Satellite, IDM, and automation with Ansible Hands-on experience supporting Cisco and Dell switching and routing technologies 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 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 Clearance Requirements: Must possess an active DoD Secret Clearance. A Top Secret (TS) security clearance (with SCI and SAP eligibility) is HIGHLY desired. #Flyer #Raider 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 up to $9k annually 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 educational 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 MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.