Sr. Security Engineer (Trellix)

On-site in Washington, DC

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.

Due to federal security clearance requirements, applicant must be a United States Citizen with an active Top Secret clearance. This is a full-time, permanent opportunity, offering a competitive salary and comprehensive benefits package. Qualified applicants must be willing and able to work on a w2 basis.

Salary: $140,000 - $170,000/ yr. w2

• Lead engineering and administration of Trellix security platforms, including 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 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 monitoring and incident response capabilities.
• Create and maintain security engineering standards, SOPs, playbooks, and operational procedures.
• Support compliance initiatives aligned to federal cybersecurity frameworks and regulations.
• Perform analytical troubleshooting and root-cause analysis to improve platform reliability and security outcomes.

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

Recruitment Transparency Notice

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening  and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team ( View email address on us.fitly.work , View phone number on us.fitly.work) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.

· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.

· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.

If you have any indication of fraudulent activity, please contact View email address on us.fitly.work .

About Eliassen Group:

Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

Don’t miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!