Information Systems Security Engineer (ISSE)

Peraton is seeking an Information Systems Security Engineer (ISSE) to join our team of qualified, diverse individuals. The ideal candidate will play a critical role in safeguarding mission-essential Physical Security Systems. In this role, you’ll serve as the trusted security authority for assigned information systems, ensuring they operate with the highest level of protection. You’ll have the opportunity to work closely with system stakeholders, apply your technical expertise, and directly contribute to the security posture of systems that protect people, facilities, and critical assets. As an ISSE, you’ll be responsible for the end-to-end security lifecycle from designing secure architectures to guiding systems through certification and accreditation. You’ll monitor operations, maintain compliance with federal requirements, and develop creative, practical solutions to complex security challenges. This is a role where your expertise will have a tangible impact every single day.

The position requires on-site work at our Washington, DC location.  

Day to Day Work Responsibilities:

• Responsible for maintaining the appropriate operational security posture for the information systems that provide functionality to the Physical Security Systems.
• Work in close coordination with the system stakeholders in monitoring the information system(s) and its operation environment to include developing and updating the authorization documentation, implementing configuration management across authorization boundaries.
• Develop and implement secure system architectures.
• Identify, assess, and mitigate security risks.
• Conduct threat modeling and vulnerability assessments.
• Design and implement technical security controls (e.g., firewalls, encryption, access controls).
• Ensure secure configuration of systems and networks.
• Prepare and maintain security documentation (e.g., SSPs, POA&Ms).
• Support audits and certification/accreditation processes.
• Translate complex security requirements into actionable engineering tasks.
• Work with stakeholders including system owners, developers, and security analysts.

Basic Qualifications:

• Bachelor's degree and 5 years of experience, or a High school diploma/equivalent and 9 years of experience.
• U.S. Citizenship required.
• Must have an active Secret clearance to be considered.

• Hands-on experience with information system security engineering in accordance with NIST RMF and/or DoD 8500 series guidance.

• Demonstrated expertise in designing, implementing, and assessing technical security controls (firewalls, IDS/IPS, encryption, access control, etc.).

• Experience developing and maintaining security documentation (e.g., System Security Plans (SSP), POA&Ms).

• Familiarity with vulnerability management, threat modeling, and security risk assessments.

• Strong knowledge of secure system architectures, configuration management, and system hardening techniques.