Overview We are seeking a highly motivated and skilled Senior Linux Administrator to join our team. This role covers installation, configuration, maintenance, and troubleshooting of Linux and Windows-based systems in a secure environment. The candidate will possess a Security+ certification and an active Top Secret clearance with SCI and SAP eligibility . Experience with Special Access Programs (SAP) within the last three years is highly desirable. This role is an in-person role co-located with our government customer’s organization at WPAFB. Responsibilities Install, configure, and maintain servers and workstations. Perform system hardening and security audits 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. Automate routine tasks using scripting languages (e.g., Ansible, Bash, Python). Collaborate with other IT staff to ensure system stability and availability. Provide technical support to end-users. Stay current with emerging technologies and best practices in systems administration. Maintain accurate documentation of system configurations and procedures. Qualifications – Required CompTIA Security+ Certification Active Top Secret Clearance with SCI and SAP eligibility Working knowledge of Windows server administration Experience with system monitoring and performance tuning Strong scripting skills (Bash, Python preferred) Excellent troubleshooting and problem-solving abilities Strong communication and interpersonal skills 6+ years of experience administering Linux systems (e.g., Red Hat, CentOS, Ubuntu) Qualifications – Preferred Experience with Special Access Programs (SAP) within the last 3 years Experience with virtualization technologies (e.g., VMware, KVM) Experience with configuration management tools (e.g., Ansible, Puppet, Chef) RHCSA Certification Linux+ Certification 12+ years of relevant IT experience and a Bachelor’s degree in a related field OR 10+ years of relevant IT experience and a Master’s degree in a related field Travel Occasional travel may be required. Work Environment This is a 100% on-site position. Perks & Benefits Vacation: New Hires Accrue 20 days of PTO and 10 Holidays per Year Health Insurance: Zero Deductible Health Plans Flexible Schedules: Flex Schedules Professional Development: Up to $10,000 Annual Education/Training Reimbursement ESOP: Funded Stock Ownership Plan 401k Match+: 6% 401k Match + Immediate Vesting Bonus Program: Semi-Annual Bonus Opportunity Mentorship: Career Mentorship Programs Why MTSI is a Great Place to Work Interesting Work: Our co-workers support important national defense and security programs. Values: Employees come first; we reward them with strong benefits and high levels of support. 100% Employee Owned: We have a stake in each other’s success and in our customers’ success; company-wide town-hall meetings three times a year. Great Benefits: Most full-time staff are eligible for benefits listed below. 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 We have grown every year since our founding in 1993. About MTSI 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 EEO Statement 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. Seniority level Mid-Senior level Employment type Full-time Job function Information Technology Industries Space Research and Technology #J-18808-Ljbffr