Information System Security Engineer; ISSE

Overview

Peraton is seeking an Information Systems Security Engineer (ISSE) to support our customer onsite in Annapolis Junction.

Responsibilities include:

• Design, implement, and maintain enterprise security architecture 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 Power Shell, 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 implement 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 administering, 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 Cyber Ark.
• Monitors, analyzes, and detects cyber events and incidents within information systems and networks under general supervision.
• Assists with integrated, dynamic cyber defense, coordinates and maintains security toolsets to support organizations’ continuous monitoring and ongoing authorization programs.
• Establishes a framework by which cyber risk can be measured and quantified in the marketplace.
• Determines security requirements by evaluating business strategies and requirements; researching information security standards; conducting system security and vulnerability analyses and risk assessments; studying architecture/platform; identifying integration issues; preparing cost estimates.
• Implements security systems by specifying intrusion detection methodologies and equipment; directing equipment and software installation and calibration; preparing preventive and reactive measures; creating, transmitting, and maintaining keys; providing technical support; completing documentation. Verifies security systems by developing and implementing test scripts.
• Maintains security by monitoring and ensuring compliance to standards, policies, and procedures; conducting incident response analyses; developing and conducting training programs.
• Responsible for the design, development, implementation, and integration of a DoD IA architectures, systems, or system components for use within computing, network, and enclave environments.
• Ensures that the architecture and design of development and operational systems are functional and secure.
• This includes designs for program of record systems and special purpose processing nodes with platform IT interconnectivity.

• 5 years with BS/BA; 3 years with MS/MA; 0 years with PhD with 4 plus years in lieu of degree
• Must possess an active Top Secret with SCI Eligibility
• Must be DoD 8570.1-M/8140 IAT Level III certification (SecurityX (CASP), GCIH, CISA, CISSP) compliant
• Strong background in networking (TCP/IP, firewalls, VPNs), cloud security (AWS/Azure), Kubernetes, and Dev Sec Ops .
• 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, Cyber Ark, Trellix, Splunk Enterprise, VMware vSphere, Git Lab, 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.