Information System Security Engineer (ISSE)

Volume Integration•Chantilly, VA

2d•Onsite

About The Position

NS2 Mission is seeking an experienced Information Systems Security Engineer (ISSE) to support our team in Chantilly, VA. In this role, you'll help ensure the security, compliance, and accreditation of mission-critical systems across enterprise and cloud environments. Working closely with engineering teams, ISSMs, and government stakeholders, you'll guide systems through the Risk Management Framework (RMF) lifecycle while helping maintain a strong security posture in support of customer mission objectives. If you're passionate about cybersecurity, system accreditation, and enabling secure technology solutions, we'd love to hear from you.

Requirements

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.
TS/SCI with an FSP clearance.
Ability to obtain or maintain a U.S security clearance which requires U.S citizenship.

Nice To Haves

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.

Responsibilities

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.