Security Engineer (TOP SECRET Clearance Required)

i3 • Chantilly, VA

12h

About The Position

The Senior Security Engineer secures enterprise applications, cloud environments, networks, and critical infrastructure. The role advances the organization's security posture through proactive monitoring, threat detection, incident response, and continuous improvement. The engineer leads security engineering efforts across multiple systems, designs and implements security controls, supports cloud-based platforms, provides technical mentorship, and ensures alignment with security policies and organizational cybersecurity requirements.

The position also involves multi-model and multi-modality orchestration, including advanced AI implementations and data architecture; management of enterprise infrastructure and cross-domain solutions in air-gapped and hybrid environments; and application development and integration using modern programming languages and frameworks.

Requirements

• U.S. citizenship and a Top Secret clearance.
• Bachelor's degree.
• At least 8 years of experience 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 using TypeScript, React, Python, FastAPI, and other technologies.

Nice To Haves

• Master's degree in Cybersecurity, Information Assurance, or a 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.

Responsibilities

• 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.
• Use security monitoring, logging, SIEM, and alerting tools.
• 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 This Job Offers

• Job Type: Full-time
• Career Level: Senior