Overview Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can’t be done by solving the most daunting challenges facing our customers. Visitperaton.comto learn how we’re keeping people around the world safe and secure. Responsibilities Position SummaryThe Information System Security Engineer is responsible for designing, implementing, maintaining, and continuously improving the security posture of the organization’s information systems, networks, applications, and data. This role ensures compliance with Customer security frameworks, regulations, and industry best practices while proactively identifying and mitigating risks to protect information assets.ResponsibilitiesEvaluate, maintain, and improve security controls, architectures, and solutions across systems, networks, endpoints, AWS cloud environments, and applications.Perform risk assessments and vulnerability assessments based on controls, security architecture reviews.Document and maintain cybersecurity environment, standards, procedures, and system security plans.Collaborate with IT, engineering, development, and business teams to embed security into system design, development, and operational processes (DevSecOps practices).Evaluate emerging threats, technologies, and security solutions; recommend improvements to the security program.Provide security guidance and awareness support to technical and nontechnical stakeholders.Support continuous monitoring, metrics reporting, and security posture improvement initiatives. Qualifications RequiredTS/SCI with relevant polygraphBA/BS and 12+ years of experience; Masters and 10+ years of experience; an additional four years of experience may be considered in lieu of degree.At least 3 years of hands-on experience in information systems security, cybersecurity engineering, or related roles in the customer environment as an ISSE.Working knowledge of security frameworks and standards (NIST SP 80053, NIST Cybersecurity Framework, ISO 27001, CIS Controls, etc.).Experience with security technologies such as firewalls, SIEM platforms, vulnerability management tools, endpoint protection, identity and access management (IAM), encryption, and network security controls.Proficiency in assessing and securing operating systems (Windows, Linux), networks, cloud environments (AWS, Azure, or GCP), and applications.Preferred QualificationsBachelor’s degree in Computer Science, Information Security, Cybersecurity, Information Systems, or a related field (or equivalent practical experience).Relevant industry certifications such as CISSP, CISM, CompTIA Security+, CEH, GIAC certifications (GSEC, GCIA, GCIH, etc.), or cloud security certifications (CCSP, AWS Security Specialty, Azure Security Engineer, etc.).Agile software development cycle including the ability to use Jira.Hands-on experience with scripting or automation (Python, PowerShell, Bash) for security tooling and processes.Prior experience supporting compliance audits or regulatory frameworks relevant to the organization.Experience in incident response, forensic analysis, or security operations center (SOC) environments.Knowledge of zero trust architecture principles and modern identity/security architectures.