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# Sr. Security Engineer (Trellix)

- **Company:** Eliassen Group
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Salary:** $130,000.0 - $170,000.0
- **Contract:** Permanent contract
- **Skills:** Cloud Computing Security, Cyber Security, Microsoft Exchange Server, Executive Information Systems, Python (Programming Language), Windows PowerShell, Security Information and Event Management, Systems Integration, Cyber Threat Analysis, National Institute of Standards and Technology Cybersecurity Framework, Restful APIs, Security Orchestration, Automation & Response
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/16_e83d8af81

## About the Role

* Active TS/SCI security clearance.
 * 5+ years of experience administering and engineering Trellix security solutions in a large enterprise environment.
 * Hands-on experience with Trellix ePO, ENS, EDR, DLP, Drive Encryption (FRP/FRMP), TIE, DXL, Policy Auditor, Rogue System Detection, TSME, Application and Change Control (Solidcore), and FIM.
 * Experience implementing and managing application whitelisting, endpoint hardening, encryption, and data protection technologies; integrating endpoint security platforms with SIEM, SOAR, threat intelligence, and identity management solutions.
 * Strong understanding of endpoint security architecture, cyber threat detection, incident response, and risk management principles; experience developing and maintaining DLP policies, device control, and data exfiltration prevention controls.
 * Experience supporting SOCs and enhancing 24x7 threat monitoring and response capabilities; ability to develop engineering standards, SOPs, playbooks, and operational procedures.
 * Experience supporting compliance initiatives aligned with federal cybersecurity frameworks and regulations; strong analytical, troubleshooting, and root-cause analysis skills.
 * Nice to Haves: Experience with Insider Risk, Data Protection, or UAM programs; knowledge of CNSSD 504, NIST 800-53, NIST 800-207, and NIST CSF; automation using PowerShell, Python, or REST APIs; integrating Trellix telemetry with SIEM and SOAR; executive dashboards and metrics; FIM for compliance and forensics; JCIP or FISMA support; familiarity with threat-informed defense and automation frameworks; relevant Trellix, cybersecurity, or cloud security certifications.

## Description

As a Sr. Security Engineer (Trellix), you will serve as the technical lead for our client's endpoint security and data protection ecosystem. You will balance day-to-day operational support with strategic cybersecurity engineering initiatives while partnering with security operations, infrastructure, application teams, and leadership to strengthen the overall security posture., * Serve as technical lead for Trellix endpoint security and data protection capabilities across a large enterprise.

 * Administer and engineer Trellix ePO, ENS, EDR, DLP, Drive Encryption (FRP/FRMP), TIE, DXL, Policy Auditor, Rogue System Detection, Trellix Security for Microsoft Exchange (TSME), Application and Change Control (Solidcore), and File Integrity Monitoring (FIM).
 * Implement and manage application whitelisting, endpoint hardening, encryption, and data protection technologies.
 * Integrate endpoint security platforms with SIEM, SOAR, threat intelligence, and identity management solutions.
 * Develop and maintain DLP policies, device control mechanisms, and data exfiltration prevention controls.
 * Support SOC operations and enhance 24x7 threat monitoring and incident response capabilities.
 * Develop security engineering standards, SOPs, playbooks, and operational procedures.
 * Support compliance initiatives and implement security controls aligned to federal cybersecurity frameworks and regulations.
 * Perform analytical troubleshooting and root-cause analysis for endpoint security issues.
 * Collaborate with security operations, infrastructure, application teams, and leadership to strengthen security posture.