> Markdown version of [/jobs/ext/2219814-senior-security-engineer](https://www.wearedevelopers.com/jobs/ext/2219814-senior-security-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Security Engineer - **Company:** Leidos, Inc. - **Location:** Boulder, CO, United States (Remote available) - **Experience:** Expert - **Salary:** $131,300.0 - $237,350.0 - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Software System Penetration Testing, Cloud Engineering, Cyber Security, Continuous Integration, Linux, Identity and Access Management, Integrated Development Environments, Intrusion Detection and Prevention, Python (Programming Language), Key Management, Network Layer, Network Protocols, Release Management, Ansible, Red Team (Cyber Security), Reverse Engineering, Secure Coding, Security Information and Event Management, Software Deployment, Software Engineering, Software Vulnerability Management, Scripting, Large Language Models, Containerization, Gitlab-ci, Kubernetes, Production Code, Terraform, Docker, Jenkins, Plan of Action and Milestones, Vulnerability Analysis - **Published:** August 25, 2026 - **Apply:** https://dejobs.org/x/x/769B214279204B5D8DACB4F19DCEAFC9/job/ ## About the Role 8+ years of professional experience in security engineering, secure software development, or infrastructure security. Experience securing and using agentic tooling for writing and maintaining production code, managing cloud infrastructure, and release management frameworks. Experience owning security outcomes for a technical product from ideation to production, and influencing engineering teams toward secure design without direct authority. Experience hardening software deployments, networks, and production infrastructure at scale. Experience securing software clusters for online/cloud as well as on-prem or air-gapped installations. Experience with threat modeling, vulnerability management, and secure development practices across first- and third-party code. Familiarity with NIST RMF, continuous ATO, and control automation., * 15+ years Hands-on experience securing and hardening Linux systems at the OS and network layer * Expertise in at least one scripting language (Python preferred) * Working knowledge of network protocols, cryptographic fundamentals, and key management * Experience with infrastructure-as-code and containerization (Ansible/Terraform, Docker/Kubernetes) * Experience administering or securing a CI/CD system (GitLab CI, Jenkins, or similar), * Experience working in accredited/classified environments, including cross-domain solutions * Offensive security background - penetration testing, red team, or serious CTF experience * Detection engineering or SIEM experience * Experience with embedded, real-time, or otherwise constrained platforms * Exposure to reverse engineering or vulnerability research * Relevant certifications (CISSP, OSCP, GCIH) - useful, not required * Non-human/agent identity and secrets management - short-lived credentials, scoping, and audit for autonomous actors, which is a genuinely different problem than human IAM. * Sandboxing and egress control for code-executing agents. * Familiarity with NIST AI RMF and the fact that continuous-ATO control automation now has to cover AI system controls, not just traditional ones. * Using LLMs to accelerate the compliance grind control narrative drafting, evidence collection, POA&M triage. ## Description We are looking for a Security Engineer to own the security posture of the environments where we build, test, and deliver advanced AI-cyber capabilities. You will be embedded with software engineers, reverse engineers, and vulnerability researchers, hardening the infrastructure, supply chains and pipelines on while guiding their secure development. The work includes guiding and reviewing build integrity and supply chain review to threat modeling our own tooling. If you have ever looked at a supply chain & development environment and immediately started listing the ways you would secure it, this is the job. You will be the person the team trusts to tell them when something is a real risk and when it is just noise As anAI Security Integration Engineer on our team, you will bridge the gap between traditional security infrastructure and modern programmatic defense. You will guide the secure development and evolution of software vulnerability tooling. Your primary focus will be working with the development team to maintainmaintaining the tool security posture utilizing continuous ATO. review workflows and pipelines by leveragingPython, assessing robustAPI integrations, maintained exploringAI/LLM orchestrationto rapidly scale threat detection and response capabilities. Support ATO and continuous vuln management. ## Related Videos - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [The Road to MLOps: How Verivox Transitioned to AWS](https://www.wearedevelopers.com/videos/1050-the-road-to-mlops-how-verivox-transitioned-to-aws) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Events like RSAC Get You CISOs. Developers Decide What Actually Gets Deployed.](https://www.wearedevelopers.com/magazine/693-events-like-rsac-get-you-cisos-developers-decide-what-actually-gets-deployed) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Understanding and Mitigating Common Web Vulnerabilities](https://www.wearedevelopers.com/magazine/565-understanding-and-mitigating-common-web-vulnerabilities) - [Dev Digest 138 - Are you secure about this?](https://www.wearedevelopers.com/magazine/486-dev-digest-138-are-you-secure-about-this)