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Senior Information Systems Security Engineer
Cyber Defense TechnologiesUnited Statesfull_timeVerifiedPosted 23 Mar 2026
About the role
Overview: Cyber Defense Technologies (CDT) is seeking a highly skilled and motivated Senior Information Systems Security Engineer (ISSE) onsite in Chantilly, VA. The ideal candidate will be responsible for conducting information systems security engineering activities throughout the lifecycle. Be responsible for capturing and refining information protection requirements to ensure their integration into information systems acquisitions and information system development through purposeful security design or configuration. Integrates security functional requirements into existing acquisition lifecycle phases, milestones, and documents using systems engineering principles and methodologies. Implementing security controls including software engineering methodologies, security engineering methodologies, security engineering principles, and secure coding techniques and coordinates activities with assessment and authorization stakeholders.
Clearance Requirements: An active TS/SCI with CI polygraph. Candidates who do not meet this requirement will not be considered.
Responsibilities:
Clearance Requirements: An active TS/SCI with CI polygraph. Candidates who do not meet this requirement will not be considered.
Responsibilities:
- Responsible for capturing and refining information protection requirements to ensure their integration into information systems acquisition and information systems development through purposeful security design or configuration.
- Provide support for IA systems concepts, requirements, design, development, implementation, and/or integration from end-to-end, of a system or system component as required.
- Develop and implement security designs for new or existing network systems to ensure the design of hardware, operating systems, and software applications adequately address cybersecurity requirements.
- Design, develop, and implement network security measures that provide confidentiality, integrity, availability, authentication, and non-repudiation.
- Identify, assess, and recommend cyber or cyber-enabled products used within information systems to ensure products are in compliance with evaluation and validation requirements.
- Provide engineering support to security/certification test and evaluation activities.
- Ensure the implementation of IA policies into system architectures.
- Provide support to efforts related to the system development lifecycle to include documentation and configuration management.
- Provide technical support to cybersecurity incident responses.
- Create, update, and present IA related briefings and other related materials to both internal and external stakeholders, participate in and support various IA IC forums and industry-based working groups.
- Coordinates activities with assessment and authorization stakeholders.
- Integrates security functional requirements into existing acquisition lifecycle phases, milestones, and documents using systems engineering principles and methodologies.
- Knowledgeable of best practices when implementing security controls including software engineering methodologies, security engineering methodologies, security engineering principles, and secure coding techniques and coordinates activities with assessment and authorization stakeholders.
- Master’s Degree and 4 year work experience, Bachelor’s Degree and 6 years of work experience or equivalent, Associates Degree and 8 years of work experience or equivalent, High School/GED and 10 years of work experience or equivalent. Desired degree in Computer Science, Computer Engineering or related field of study.
- IAT Level III certifications.
- Knowledge of and experience with ICD 503 and the Government’s certification and accreditation process.
- Networks, computer components, system protocols, and COTS technology.
- System methodologies including client/server, web hosting, web content servers, policy servers, directory servers, firewalls, WAN, MAN, LAN, switches, and routers.
- Software integration of COTS and Government Off-the-Shelf (GOTS) products.
- VMware, Xen, Hyper V, Cloud, and other virtualization platforms.
- Education relevant to computer engineering, information security, information management, and/or computer science.
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