Lead Modeling and Simulation Engineer

SIXGEN’s mission is to deliver agile, mission-ready cybersecurity solutions that empower government and critical infrastructure organizations to stay ahead of advanced cyber threats. We combine innovation, deep expertise, and cutting-edge capabilities to uncover vulnerabilities, protect vital systems, and ensure operational superiority in an ever-evolving digital landscape.

• Position: Lead Modeling and Simulation Engineer
• Job Type: Full Time
• Location: Onsite 
• Clearance Requirements: TS/SCI & Poly (MUST HAVE)
• Travel: Up to 10%

SIXGEN supports missions by serving government and commercial organizations as they overcome global cybersecurity challenges. In this position, you’ll provide meaningful support to our customer’s missions and operations. You’ll work alongside a team of highly skilled operators who are dedicated to using innovative processes, tools, and techniques to get things done. 

• Key Responsibilities 
• Lead the development and implementation of cyber-physical and virtual simulation environments, including test ranges and emulated networks 
• Design and execute modeling frameworks to replicate real-world systems, threats, and operational scenarios 
• Integrate live, virtual, and constructive (LVC) simulation capabilities to support training, testing, and mission rehearsal 
• Collaborate with cyber operators, engineers, and analysts to ensure simulations accurately reflect threat behaviors and mission requirements 
• Oversee the validation and verification (V&V) of models and simulation outputs to ensure accuracy and reliability 
• Support data collection, analysis, and visualization from simulation activities to inform decision-making 
• Ensure compliance with DoD/IC modeling and simulation standards, cybersecurity requirements, and system accreditation processes 
• Required Qualifications 
• Bachelor’s or Master’s degree in Computer Science, Engineering, Mathematics, or a related technical field 
• 10+ years of experience in modeling and simulation, cyber range development, or systems engineering 
• Demonstrated experience with simulation tools and frameworks (e.g., MATLAB, Simulink, STK, ns-3, OMNeT++, or similar) 
• Experience supporting cyber operations, test and evaluation (T&E), or training environments 
• Strong understanding of network architectures, operating systems, and cyber threat behaviors 
• Active TS/SCI clearance (or ability to obtain/maintain) 
• Desired Qualifications 
• Experience with cyber range platforms and adversary emulation tools 
• Familiarity with MITRE ATT&CK, cyber kill chain analysis, and threat modeling 
• Knowledge of cloud-based simulation environments and containerized architectures 
• Experience with DevSecOps pipelines supporting simulation and testing environments 
• Key Competencies 
• Systems thinking and complex problem-solving 
• Ability to translate mission needs into technical simulation environments 
• Strong communication skills to interface with both technical and operational stakeholders 
• Leadership experience managing M&S teams or large-scale simulation efforts

SIXGEN is an Equal Opportunity Employer. We ensure that all applicants are considered for employment without regard to race, color, religion, sexual orientation, gender identity, national origin, disability, age, marital status, ancestry, projected veteran status, or any other protected group or class.

We are committed to fostering an inclusive culture that values diversity in our people, reflecting the communities we serve and our customer base. We strive to attract and retain a diverse talent pool and create an environment where everyone is empowered to be their authentic selves at work.