Security Engineer - Senior

Location: Chantilly, VA

Department: 60024445 - AFS Cyber Mission

Who you'll be:

We are seeking a Senior Security Engineer to secure enterprise applications, cloud environments, and critical infrastructure. This role involves advancing the organization's security posture through proactive monitoring, threat detection, incident response, and continuous improvement initiatives. The ideal candidate will lead security engineering efforts across multiple systems, design and implement security controls, support cloud-based platforms, and provide technical mentorship while ensuring compliance with security policies and organizational cybersecurity requirements.

What you'll do:

• Secure applications, cloud platforms, networks, and enterprise infrastructure.
• Lead incident response, cyber resiliency, vulnerability management, and threat detection efforts.
• Design and implement security controls and support cloud-based platforms such as AWS, Azure, or Google Cloud.
• Utilize security monitoring, logging, SIEM, and alerting tools effectively.
• Develop security policies, procedures, and technical documentation.
• Provide technical mentorship and ensure alignment with defense-in-depth principles and security policies.
• Engage in multi-model and multi-modality orchestration, including advanced AI implementations and data architecture.
• Manage enterprise infrastructure and cross-domain solutions, including air-gapped and hybrid environments.
• Develop and integrate applications with modern programming languages and frameworks.

What you need:

• US Citizen with a Top Secret Clearance
• Bachelor's degree required.
• Minimum 8 years of experience in securing applications, cloud platforms, networks, and enterprise infrastructure.
• Experience with cloud technologies such as AWS, Azure, or Google Cloud.
• Proficiency with security monitoring, logging, SIEM, and alerting tools.
• Strong understanding of network security, encryption, authentication, and access control technologies.
• Experience developing security policies, procedures, and technical documentation.
• Strong analytical, troubleshooting, and communication skills.
• Experience with in-house custom-developed applications and advanced AI, GenAI, and multi-model engineering.
• Data architecture expertise, including vector, graph, and multi-database orchestration.
• Experience with air-gapped, hybrid, and on-premise operational environments.
• Application development and integration knowledge, utilizing TypeScript, React, Python, FastAPI, and more.

Nice to have:

• Master's degree in Cybersecurity, Information Assurance, or related field.
• CISSP, Security+, CCSP, CISM, GIAC, AWS Security Specialty, Azure Security Engineer, or similar certifications.
• Experience supporting government, defense, intelligence, or highly regulated environments.
• Knowledge of Zero Trust Architecture, NIST frameworks, RMF, and compliance requirements.
• Experience with DevSecOps, container security, and Infrastructure as Code (IaC) security practices.
• Experience managing COMSEC resources or cryptographic key management systems.
• Familiarity with security automation, SOAR platforms, and advanced threat hunting techniques.