Security Engineer

About ASI ASI is the frontier AI company that dynamically orchestrates critical infrastructure and defense assets, across air traffic control, energy, logistics, and combat operations. ASI's systems simulate physical operations, hours, days, and weeks ahead, so the people running air traffic control, the electric grid, and military operations can catch problems early and act before they spread. ASI is powering vital infrastructure for customers like United Airlines, National Grid, the Federal Aviation Administration, Delta Air Lines and the Department of War. ASI is headquartered in Boston with offices in Washington, DC, Denver, and Europe, and is backed by leading investors, including Andreessen Horowitz, Citadel Securities, and Spark Capital. What You Will Do Air Space Intelligence is building mission-critical, secure infrastructure for defense and intelligence applications. We are seeking a Security Engineer to harden and maintain cloud and software environments, ensuring compliance with U.S. government security standards. As a Security Engineer, you will help harden and maintain ASI’s cloud and endpoint environment (AWS GovCloud and Microsoft GCC High) while supporting compliance with U.S. government security standards (e.g., NIST 800-171/CMMC and NIST 800-53). What We Value - Demonstrated coding skills in Python/Rust - Knowledge of container and CI/CD security (Kubernetes, image hardening, vulnerability scanning) - Investigate & remediate vulnerabilities, escalating complex issues when needed - Supply chain security experience (SBOM, artifact generation, dependency management) - Lead threat modeling sessions using established industry methodologies (e.g., STRIDE, PASTA, etc.) - Demonstrated skills in Infrastructure as a code (Terragrunt/Terraform). - Practical exposure to federal security frameworks (CMMC, NIST 800-53, FedRAMP). - Experience securing government cloud environments (AWS GovCloud), ensuring compliance with federal security requirements. - Hands-on experience with cloud-native incident alerting services (e.g., AWS GuardDuty/Security Hub, Azure Defender, etc.) - Automate configuration management, patching, and policy enforcement for networks, servers, and endpoints - Monitor security events using SIEM tools (Microsoft Sentinel, Splunk) - Collaborate with product, Platform, and compliance teams to embed security in the SDLC - Support incident response and post-incident review, growing toward leading these efforts over time How we hire: We view the interview process not as a screening or test, but rather as an opportunity to simulate what it would be like working together. We build the interview process around you. ADDITIONAL REQUIREMENTS - Security Clearance: Must be eligible to obtain DoD clearance. - Citizenship: U.S. citizenship is required for this position. - On-Site Presence: Ability to work in our Boston (BOS) office at least three days per week