New

Senior System Administrator

Modern Technology Solutions, Inc.
401(k)
United States, Ohio, Dayton
Sep 10, 2025
How you will contribute to our National Security and Defense mission: This individual will be responsible for the installation, configuration, maintenance, and troubleshooting of Linux and Windows-based systems in a secure environment. This role is an in-person role that is co-located with our government customer's organization at WPAFB. You'll be a great fit for this role if: You have a passion for information technology, 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: Install, configure, and maintain operating systems, hardware, virtual environments, and network devices to meet program needs Perform system hardening to ensure compliance with established security policies Troubleshoot and resolve hardware and software issues Manage user accounts, permissions, and access controls Implement and maintain system backups and disaster recovery procedures Monitor system performance and identify areas for improvement Collaborate with other IT staff to ensure system stability and availability Provide technical support to end-users Maintain accurate documentation of system configurations and procedures Install and maintain DevSecOps tools (GitLab, Artifactory, etc.) Install and maintain ACAS suite of tools Working knowledge of compliance frameworks such as RMF, DISA STIGs, and NIST 800-53 Qualifications Required: Working knowledge of Windows server administration 6+ years of experience administering Linux systems (e.g., Red Hat, CentOS, Ubuntu) Experience with system standup and configuration including group policy Excellent troubleshooting and problem-solving abilities Strong communication and interpersonal skills Stay current with emerging technologies and best practices in systems administration Ability to work unsupervised in a lead role Previous work supporting test or research and development environments Coordinate with program stakeholders, engineers, and other IT professionals to align system capabilities with mission objectives Provide technical expertise and recommendations for system improvements and upgrades Must have in-depth knowledge of DoD, National and applicable service and agency security policy, manuals and standards. Must have the ability to work in a dynamic environment and effectively interact with numerous DOD, military/civilian personnel and industry partners Certifications Required:* CompTIA Security+ Education:* Master's degree in an IT-related field (e.g., cybersecurity, computer science, computer engineering) with 10 years of relevant professional experience. Additional experience will be considered in lieu of education requirements. Even better if you have these desired skills: Experience as a Data Transfer Agent (DTA) Experience with virtualization technologies (e.g., VMware, KVM). Experience with configuration management, automation tools, and scripting languages (e.g., Ansible, Bash, Python, Puppet, Chef). Additional certifications of ISC2 CCSP; CompTIA SecurityX (CASP+), Linux+; RHCSA Clearance Requirements: * Must possess an active Top Secret (TS) security clearance (with SCI and SAP eligibility). U.S. Citizenship is required for this position. 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.