Senior ISSE: DoD Cyber Defense & Cloud Security

Peraton; Maryland; On-site; USD 120,000 - 180,000; Full time

Job summary

Peraton seeks an Information Systems Security Engineer to support our customer onsite in Annapolis Junction. The role emphasizes RMF-based security engineering, vulnerability management, and secure configurations across Windows, Linux, and cloud environments.

You will use Nessus, CyberArk, Trellix, Splunk, and VMware to strengthen the security posture, while developing automation scripts in PowerShell, Python, and Bash to accelerate remediation and reporting.

Qualifications

• 5+ years with BS/BA; 3+ years with MS/MA; 0 years with PhD with 4+ years in lieu of degree
• Active Top Secret with SCI Eligibility
• DoD 8570.1-M/8140 IAT Level III certification (SecurityX/CASP, GCIH, CISA, CISSP)
• Strong background in networking, cloud security, Kubernetes, and DevSecOps
• Hands-on with vulnerability management and security tooling

Responsibilities

• Design, implement, and maintain enterprise security architecture aligned with RMF, STIGs, and CIS benchmarks.
• Conduct SDLC security activities: requirements analysis, design reviews, testing, and accreditation support.
• Operate vulnerability management using Nessus, ACAS, and Qualys to identify and remediate issues.
• Secure Windows and Linux servers, cloud infra, virtualizaton, and containers.
• Lead incident response and forensics with SIEMs like Splunk; analyze logs and telemetry.
• Develop automation scripts (PowerShell, Python, Bash, Ansible) to speed remediations.
• Collaborate with admins, ISSOs, and apps teams to fix findings and baseline security.
• Perform security impact analyses for changes and deployments to ensure compliance.
• Engineer endpoint protection with Trellix ePO and host firewalls; implement whitelisting.
• Evaluate cybersecurity tools to improve monitoring and threat detection.
• Produce security documentation, architecture diagrams, SOPs, and risk reports.
• Operate CyberArk core modules (EPV, PVWA, CPM, PSM) and supervise privileged access.
• Monitor cyber events and assist integrated cyber defense for continuous monitoring.

Skills

Security engineering

Networking

DevSecOps

Scripting

Leadership

Education

BS/BA preferred

DoD 8570.1-M IAT Level III certs

Tools

Tenable Nessus

CyberArk

Trellix

Splunk Enterprise

VMware vSphere

GitLab

Windows Server

Red Hat Enterprise Linux

Ubuntu Linux

PowerShell

Python

Bash

Ansible

Job description

Peraton seeks an Information Systems Security Engineer to support our customer onsite in Annapolis Junction. The role emphasizes RMF-based security engineering, vulnerability management, and secure configurations across Windows, Linux, and cloud environments.

You will use Nessus, CyberArk, Trellix, Splunk, and VMware to strengthen the security posture, while developing automation scripts in PowerShell, Python, and Bash to accelerate remediation and reporting.