Information Systems Security Engineer

Job description

🚀 Cyber Security Engineer / ISSE – Lead Security Engineering for Mission‑Critical Systems Leidos is seeking a Cyber Security Engineer / Information Systems Security Engineer (ISSE) to support a high‑visibility, mission‑essential enterprise program. In this role, you’ll apply deep security engineering expertise to design, assess, and harden complex systems while guiding them through the full Risk Management Framework (RMF) lifecycle. If you thrive at the intersection of technical engineering, cybersecurity strategy, and accreditation excellence, this is where your impact will be felt immediately. You’ll collaborate with accreditation authorities, system owners, and engineering teams to ensure systems achieve and maintain Authorization to Operate (ATO) while meeting the highest security standards. 🌐 What You’ll Do As a senior security engineer, you’ll shape the security posture of mission‑critical applications and lead the engineering of RMF artifacts across a large‑scale enterprise environment. Your responsibilities include: Supporting mission‑critical applications through the full ATO lifecycle in alignment with customer security policies Leading security engineering efforts and co...