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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Information Systems Security Engineer (ISSE) - **Company:** Peraton Inc - **Location:** Washington, DC, United States - **Experience:** Experienced - **Salary:** $104,000.0 - $166,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Access, Microsoft Windows, Amazon Web Services, Automation of Tests, Microsoft Azure, Bash Shell, Ubuntu (Operating System), Cloud Computing, Cloud Computing Security, Cyber Security, Computer Networks, Virtual Private Networks (VPN), Python (Programming Language), Linux Servers, Windows Servers, Package Development Process, Password Management, Windows PowerShell, Systems Development Life Cycle, Red Hat Enterprise Linux, Ansible, Security Software, Session Manager SubSystems, Security Information and Event Management, Software Deployment, TCP/IP, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Cyberark, IT Architecture, Firewalls (Computer Science), Gitlab, Containerization, Kubernetes, Tenable Nessus, CIS Benchmarks, Splunk, Devsecops, Qualys - **Published:** July 1, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9004945/information-systems-security-engineer-isse ## About the Role * 5 years with BS/BA; 3 years with MS/MA; 9 years in lieu of a BS degree may be considered. * Must possess an active Top Secret with SCI Eligibility * Strong background in networking (TCP/IP, firewalls, VPNs), cloud security (AWS/Azure), Kubernetes, and DevSecOps. * Deep understanding of NIST SP 800-161, NIST RMF, FedRAMP, Common Criteria, ATO package development, and cybersecurity compliance (STIGs). * Hands-on experience managing and deploying Tenable Nessus, CyberArk, Trellix, Splunk Enterprise, VMware vSphere, GitLab, Microsoft Windows Server, Red Hat Enterprise Linux and Ubuntu Linux * Experience with scripting and automation with Powershell, Python, Bash and Ansible * Proven experience in leading projects and mentoring junior ISSE's. * Present technical briefings to leadership. * Must have a current DoD 8570.1-M IAT Level III certification (SecurityX (CASP), GCIH, CISA, CISSP) ## Description Engineering, integration, and cybersecurity support to design, build, and test enhanced services for the Department of Navy's IT architecture. Offers a wide range of roles, from cybersecurity experts to engineers specializing in systems, networks, software, and data center services., Peraton is seeking an Information Systems Security Engineer (ISSE) to support our customer onsite in Washington D.C. Responsibilities include: * Design, implement, and maintain enterprise security architectures aligned with NIST RMF, DoD STIGs, CIS benchmarks, and organizational cybersecurity policies. * Perform security engineering activities across system development lifecycle (SDLC), including requirements analysis, system design reviews, security testing, and accreditation support. * Implement vulnerability management processes utilizing Tenable Nessus, ACAS, and Qualys to identify, assess, and remediate system vulnerabilities. * Integrate cybersecurity requirements into Windows and Linux server environments, cloud infrastructure, virtualization platforms, and containerized applications. * Support incident response and forensic investigations by analyzing security logs, SIEM alerts, network traffic, and endpoint telemetry using Splunk Enterprise. * Develop automation scripts using PowerShell, Bash, and Python to streamline vulnerability remediation, account auditing, compliance reporting, and security monitoring tasks. * Collaborate with system administrators, network engineers, ISSOs, and application teams to remediate security findings and implement secure configuration baselines. * Perform security impact analysis for system changes, software deployments, and infrastructure upgrades to ensure continued compliance and operational security. * Engineer endpoint protection and hardening solutions utilizing Trellix ePO - On-prem, host-based firewalls, and application whitelisting technologies. * Evaluate and implemented cybersecurity tools and technologies to improve system security posture, continuous monitoring, and threat detection capabilities. * Produce technical security documentation, architecture diagrams, standard operating procedures (SOPs), and executive-level risk assessment reports. * Experience administrating, configuring, and troubleshooting core modules such as Enterprise Password Vault (EPV), Password Vault Web Access (PVWA), Central Policy Manager (CPM), and Privileged Session Manager (PSM) in CyberArk. ## Related Videos - [Our journey with Spring Boot in a microservice architecture](https://www.wearedevelopers.com/videos/511-our-journey-with-spring-boot-in-a-microservice-architecture) - [WeAreDevelopers LIVE - Modern DevOps for IoT Devices and More](https://www.wearedevelopers.com/videos/1805-wearedevelopers-live-modern-devops-for-iot-devices-and-more) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Enabling automated 1-click customer deployments with built-in quality and security](https://www.wearedevelopers.com/videos/83-enabling-automated-1-click-customer-deployments-with-built-in-quality-and-security) - [DevSecOps culture](https://www.wearedevelopers.com/videos/783-devsecops-culture) - [Are Code Reviews Worth It? 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