Information System Security Engineer (ISSE)

• Maintain and enhance the security posture of enterprise and cloud-based computing environments.
• Lead security accreditation efforts throughout the full system lifecycle in accordance with ICD 503 Rev. 4 and the Risk Management Framework (RMF).
• Develop, maintain, and update System Security Plans (SSPs) and other required security documentation.
• Partner with Information System Security Managers (ISSMs), engineers, and program leadership to ensure security compliance and accreditation readiness.
• Assess system risks, identify security gaps, and recommend mitigation strategies to maintain compliance.
• Interpret and apply Sponsor security policies, standards, and cybersecurity best practices.
• Support continuous monitoring activities and help ensure ongoing security compliance for mission systems.
• Collaborate with technical teams to integrate security requirements throughout the system development lifecycle.

• Senior-level experience supporting Information Systems Security Engineering activities.
• 5+ years of experience maintaining the security posture of enterprise and cloud computing environments.
• Experience managing security accreditation efforts under the ICD 503 Rev. 4 framework.
• Strong understanding of Sponsor information security policies and the Risk Management Framework (RMF).
• 5+ years of experience developing and maintaining System Security Plans (SSPs) and related security documentation., * Experience working directly with Sponsor Information System Security Managers (ISSMs) to achieve and maintain system compliance.
• Experience obtaining Intelligence Community (IC) reciprocity for one or more security accreditations.
• Familiarity with continuous monitoring, vulnerability management, and security assessment activities.
• Experience supporting secure cloud environments and enterprise modernization initiatives.

NS2 Mission’s culture of inclusion, focus on health and well-being, and flexible working models help ensure that everyone - regardless of background - feels included and can run at their best. At NS2 Mission, we believe we are made stronger by the unique capabilities and qualities that each person brings to our company, and we invest in our employees to inspire confidence and help everyone realize their full potential. We ultimately believe in unleashing all talent and creating a better world.