New

Information Systems Security Officer (ISSO) / System Administrator

Modern Technology Solutions, Inc.
401(k), remote work

2591 Eglin Boulevard (Show on map)
Feb 27, 2026
Modern Technology Solutions, Inc. (MTSI) is seeking a highly skilled Information Systems Security Officer (ISSO) / System Administrator to join our team supporting the 350th Spectrum Warfare Group at Eglin AFB, FL. This is a dynamic, hands-on role where you will be instrumental in the standup and sustainment of critical systems for the U.S. Air Force's Electronic Warfare mission. As a key member of our team, you will serve a hybrid function, ensuring the confidentiality, integrity, and availability (CIA) of complex information systems. You will be responsible for both the strategic governance and hands-on technical maintenance of systems operating at the Secret, SCI, and SAP levels. The ideal candidate is a proactive and detail-oriented professional with a strong grasp of the Risk Management Framework (RMF), system administration, and program management fundamentals. You will be expected to collaborate effectively with a wide range of stakeholders, from front-line users to high-level Authorizing Officials (AO). Information System Security Officer (ISSO) Responsibilities: This part of the role focuses on the governance, risk, and compliance aspects of cybersecurity.Major Duties and Responsibilities may include: Risk Management Framework (RMF): Lead the end-to-end RMF process to obtain and maintain the Authority to Operate (ATO) for new and existing systems. Security Artifacts & Documentation: Create, review, and maintain all required RMF artifacts, including system security plans (SSPs), network diagrams, and risk assessment reports. Policy & Procedure Management: Conduct annual reviews of all cybersecurity policies. Create, update, and manage technical documentation, including Standard Operating Procedures (SOPs) and work instructions. Vulnerability Management: Perform cyber impact evaluations and implement corrective actions for Information Assurance Vulnerability Alerts (IAVAs). Oversee and verify system hardening using tools like STIGs. Auditing & Monitoring: Utilize security tools such as ACAS (Assured Compliance Assessment Solution) to perform regular system audits and ensure compliance. Monitor system logs and respond to security incidents. Stakeholder Collaboration: Serve as a primary cybersecurity advisor, effectively communicating risk and strategy to stakeholders including the AO, Wing ISSM, and Squadron Commanders. System & Network Administrator Responsibilities: This part of the role involves hands-on technical administration and user support.Major Duties and Responsibilities may include: System Maintenance: Perform day-to-day maintenance, including server and client updates, software installation, and applying security patches across Windows and Linux environments. Configuration Management: Implement and maintain a robust configuration management program to ensure the integrity and baseline control of all systems. User & Account Management: Create and manage system accounts, conduct user training on security protocols, and serve as a point of contact for technical support. Data Transfers: Securely perform data extractions and transfers between system boundaries with differing classification levels, ensuring data integrity and compliance with all security protocols. Network & Hardware Support: Provide foundational IT support, troubleshoot hardware and software issues, and ensure network performance meets operational needs. Required Qualifications:* 5+ years of experience as an ISSO or in a similar cybersecurity role. 3+ years of experience providing IT support for SAP and SCI information systems. Proven, in-depth experience with the entire Risk Management Framework (RMF) lifecycle and the ATO process. Demonstrated experience creating security artifacts (SSPs, diagrams, risk assessments). Strong understanding of Program Management fundamentals. Ability to perform technical writing for policies, SOPs, and work instructions. Experience with vulnerability management tools (ACAS, Nessus) and system hardening (STIGs). DoD 8140 IAM Level I Certification (e.g., Security+ CE). Desired Skills & Experience: Cloud Expertise: Experience with cloud architecture and infrastructure (AWS, Azure), particularly in a secure government environment. Advanced Certifications: CISSP or CISM (fulfills DoD 8140 IAM Level II). System Administration: Hands-on experience as a System Administrator for Windows and Linux operating systems. OS certifications (e.g., RHCSA, Microsoft Certified) are a plus. Networking: Network+ certification or equivalent knowledge of network architecture and protocols. Scripting: Experience with scripting languages (e.g., PowerShell, Bash) for automation. Background: General knowledge of military platforms, electronic warfare systems, and COMSEC procedures. Experience working on-site in a government client environment Educational Requirements:* Bachelors degree in IT, cybersecurity or similar.Masters degree preferred. Travel Requirements: Routine travel is not expected but some travel may be required based on mission needs Security Clearance: TS clearance with current in-scope SSBI required Ability to obtain and maintain SCI/SAP/STO/NATO clearances required.Current SCI desired All hires contingent on candidate meeting requirements for and gaining required security clearances This position is subject to random drug and polygraph testing Additional Information: Work will be performed at a government site on Eglin AFB - telework or remote work is not authorized. This is a traditional Monday - Friday job with 0800-1700 work hours.Flex-time is not authorized. Non-traditional work hours may be required at times based on mission needs. US Citizenship is required for this position. #LI-RR1 #MTSIjobs #mtsi #LI-Onsite 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.