Cyber Security Analyst (ISSO)

The Cyber Security Analyst (ISSO) is responsible for maintaining the operational security posture, continuous monitoring, and regulatory compliance of assigned Department of Defense (DoD) information systems and coalition network environments. The Cyber Security Analyst (ISSO) works closely with the Information System Security Manager (ISSM), system owners, and network/systems engineering teams to enforce DoD cybersecurity baselines and technical controls throughout the system lifecycle.

This role requires hands-on experience with core enterprise cybersecurity tools, including Splunk Enterprise/Enterprise Security (ES), Tenable/ACAS, and Trellix ePolicy Orchestrator (ePO), to drive real-time telemetry analysis, vulnerability management, endpoint compliance, and continuous monitoring (ConMon) under the NIST Risk Management Framework (RMF). All compliance tracking, documentation, and authorization management for assigned systems is executed within eMASS.

Primary Responsibilities

1. SIEM, Security Analytics & Continuous Monitoring

• Perform daily security event reviews, log analysis, and system auditing across servers, network infrastructure, and operating systems in coalition enclaves.
• Develop and execute complex Search Processing Language (SPL) queries in Splunk Enterprise/ES to aggregate and correlate events across multiple data sources.
• Design, implement, and maintain Splunk dashboards, visualizations, and alerts to detect anomalous activity, policy violations, and unauthorized access attempts.
• Troubleshoot log ingestion, forwarding, parsing, and telemetry issues, ensuring comprehensive and accurate data collection.
• Validate NTP time synchronization and log integrity across distributed network devices and servers.
• Ensure audit records are collected, retained, and protected in accordance with DoD policies and applicable regulations.
  

2. Vulnerability Management & Endpoint Administration

• Operate and maintain the Assured Compliance Assessment Solution (ACAS) utilizing Tenable Security Center and Nessus scanners across enclave infrastructure.
• Configure, schedule, and execute authenticated/unauthenticated credentialed scans for servers, network devices, databases, and workstations.
• Manage ACAS scan policies, credentials, and plugin updates to ensure comprehensive vulnerability coverage.
• Analyze scan results, validate findings, triage false positives, and track remediation in support of Plans of Action and Milestones (POA&Ms).
• Administer Trellix ePO within the enterprise enclave, including agent deployment, policy enforcement, update scheduling, and verification of signature/definition compliance.
• Produce endpoint compliance metrics and operational reports for leadership, system administrators, and inspection teams.
  

3. Enclave Boundary Defense & Security Administration

• Monitor and maintain the security posture of enclave gateways, firewalls, boundary devices, and intrusion detection/prevention systems (IDS/IPS).
• Help protect enclave resources against unauthorized access, modification, destruction, or disclosure.
• Review change requests and conduct Security Impact Analyses (SIA) for system modifications, port/protocol changes, and routing updates.
• Coordinate with systems and network administrators to ensure security and monitoring requirements are integrated into system deployments and changes.
  

4. Risk Management Framework (RMF) & eMASS Administration

• Support end-to-end RMF activities in eMASS, including maintaining System Security Plans (SSPs), continuous monitoring strategies, and security control implementation statements.
• Populate, update, and manage system milestones, control assessments, test results, and POA&Ms within eMASS.
• Verify implementation and enforcement of DISA Security Technical Implementation Guides (STIGs) and Security Requirements Guides (SRGs) across assigned systems.
  

Required Qualifications

Education & Experience

• Bachelor’s degree in Cybersecurity, Computer Science, Information Technology, or a related technical discipline.Equivalent relevant experience, military training, or technical certifications may be considered in lieu of a degree.
• 7+ years of progressive experience in cybersecurity, information assurance, or security operations supporting DoD systems and networks.

Certifications

• Active DoD -M / DoD 8140 baseline certification meeting IAT Level III

Technical Experience

• Hands-on operational experience with Splunk Enterprise and/or Splunk Enterprise Security (ES), including SPL query development, correlation searches, dashboard creation, alerting, and forwarder troubleshooting.
• Demonstrated experience configuring, executing, and troubleshooting ACAS/Tenable scans; managing plugins and credentials; and assessing vulnerability findings in support of POA&M management.
• Experience administering Trellix ePO in an enterprise environment, including policy tuning, agent management, and endpoint compliance reporting.
• Proven proficiency using eMASS as the primary RMF governance tool for managing packages, documenting controls, uploading test results, and managing POA&Ms.
• In-depth experience implementing and remediating DISA STIGs and SCAP benchmarks for Windows/Linux systems, applications, and network infrastructure.

Clearance

• Active DoD Secret security clearance (or higher), with the ability to maintain the clearance as a condition of employment.
  

Preferred Qualifications

• Active IAT Level III certification (e.g., CASP+ CE, CISSP, or equivalent).
• Prior experience securing and monitoring coalition or partner network enclaves (e.g., CENTRIXS, BICES, Mission Partner Environments (MPE)).
• Advanced proficiency with eMASS package management, workflow transitions, and artifact mapping.
• Tool-specific certifications such as Splunk Certified Power User/Enterprise Admin or Tenable Certified Nessus Auditor.
• Scripting experience (e.g., Bash, Python, PowerShell) to support automation of log parsing, reporting, and administrative workflows.
• Strong written and verbal communication skills, including experience presenting technical risk and compliance posture to ISSMs, system owners, and other stakeholders.

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