Information Systems Security Engineer (ISSE) SME

• Develop system architectures and security designs that align with mission requirements and meet RMF and DoD security policies.
• Integrate cybersecurity solutions into spacecraft systems, ground systems, and mission operations.
• Apply security controls and mitigation strategies throughout the system lifecycle to address threats and vulnerabilities.

• Lead the implementation of RMF processes to ensure secure system development, deployment, and operation.
• Create and maintain documentation for Authorization to Operate (ATO) submissions, including System Security Plans (SSPs) and security assessment reports.
• Coordinate with Authorizing Officials and other DoD stakeholders to obtain and sustain the system's ATO.

• Plan, execute, and oversee vulnerability scans, penetration testing, and security assessments for space-based systems.
• Analyze test results and prepare recommendations for system hardening and risk reduction.
• Collaborate with engineering teams to resolve identified security gaps and enhance system resilience.

• Develop and implement procedures for detecting, reporting, and responding to potential security incidents.
• Assist operations teams with real-time cybersecurity monitoring to identify and mitigate threats.

• Work closely with program managers, system architects, engineering teams, and external contractors to ensure cybersecurity requirements are met.
• Act as the cybersecurity expert and advisor during design, testing, deployment, and operational phases of the systems.

• Prepare cybersecurity documentation, including risk analysis reports, mitigation plans, technical white papers, and system certifications.
• Present findings and progress reports to DoD stakeholders and leadership.

• Bachelor's degree in Cybersecurity, Information Systems Engineering, Computer Science, or related technical field. Advanced degree preferred.
• 15+ years of experience as an ISSE or in related cybersecurity roles supporting DoD programs.
• Expertise in DoD cybersecurity regulations, including RMF, NIST SP 800-53 controls, and FISMA.
• Hands-on experience with vulnerability assessment tools, such as Nessus, Splunk, or Tenable.
• Strong understanding of space system architectures, secure communications, and encrypted data operations.
• Exceptional analytical and problem-solving skills with attention to detail.

• CISSP, CEH, CISA, or similar cybersecurity certifications.
• Experience with space-based cybersecurity systems, including satellite communications and ground stations.
• Familiarity with advanced technologies such as autonomous system security, machine learning in cybersecurity, and quantum-resistant encryption.
• Previous experience supporting DoD programs

• Active TOP SECRET (TS) clearance with eligibility for Sensitive Compartmentalized Information (SCI).
• 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