Information Systems Security Manager (ISSM) - Senior

Modern Technology Solutions, Inc.
401(k)
United States, Alabama, Huntsville
Jan 06, 2026
We are seeking an experienced Senior Information System Security Manager (ISSM) to lead cybersecurity efforts for a strategic Department of Defense (DoD) initiative focused on space-based operations and national defense. As the ISSM, you will play a key leadership role in managing and overseeing the security posture of information systems, ensuring their compliance with DoD standards and the Risk Management Framework (RMF). You will work across multidisciplinary teams to maintain the confidentiality, integrity, and availability of the program's critical systems and data. Responsibilities: As the ISSM, your responsibilities will include: Cybersecurity Program Management: Establish, implement, and enforce security policies, procedures, and plans for information systems in accordance with DoD and RMF requirements. Oversee the development and maintenance of System Security Plans (SSPs), ensuring updates are in line with changing operational requirements or regulations. Conduct regular evaluations to ensure systems adhere to DoD directives and maintain a strong security posture. Risk Management Framework (RMF) Oversight: Lead the RMF process for systems, including categorization, security controls implementation, testing, and continuous monitoring. Ensure timely submission of Authorization to Operate (ATO) packages and maintain systems' authorization status. Collaborate with stakeholders to identify risks and implement mitigation strategies to ensure mission success. Incident Response and Risk Mitigation: Manage cybersecurity incidents, including detection, analysis, containment, recovery, and reporting in coordination with DoD policies. Provide leadership in identifying vulnerabilities and risks associated with program systems, and deploy solutions to reduce exposure. Develop contingency and disaster recovery plans to maintain operational resilience. Leadership and Collaboration: Serve as the primary cybersecurity advisor to program leadership, engineering teams, and DoD stakeholders for program systems. Mentor and lead information security team members in compliance efforts and technical execution. Coordinate with external agencies, vendors, and contractors to align cybersecurity requirements across systems. Continuous Monitoring and Reporting: Implement and oversee continuous monitoring programs for real-time risk assessment and cybersecurity status tracking. Prepare and deliver briefings, reports, and metrics to leadership and key stakeholders regarding system security posture and cyber readiness. Required Qualifications: Bachelor's degree in Cybersecurity, Information Assurance, Computer Science, or related technical field. Advanced degree preferred. 10+ years of experience as an ISSM or similar leadership position in cybersecurity, preferably supporting DoD programs. Comprehensive knowledge of DoD cybersecurity standards, RMF, NIST SP 800-53 controls, and FISMA. Proven expertise in managing cybersecurity programs for mission-critical systems and obtaining/maintaining ATOs. Familiarity with security tools such as STIGs, ACAS, Nessus, or Splunk. Strong leadership, analytical, and communication skills with the ability to manage multidisciplinary teams and complex challenges. Desired Qualifications: CISSP, CISM, CEH, or similar cybersecurity certifications. Hands-on experience with space-based or satellite communication systems cybersecurity. Knowledge of advanced cybersecurity technologies (e.g., machine learning for threat detection, quantum-resistant encryption). Experience supporting DoD national security-focused programs. Clearance Requirements Active TOP SECRET (TS) clearance with eligibility for Sensitive Compartmentalized Information (SCI). U.S. Citizenship is required for this position. #LI-MW2 #Merlin 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.