Sr. Security Engineer (Trellix)
Washington dc, DC
Category: Engineer
Industry: Government
Standard Hours: Open
Reference ID: JN -082026-108395
Date Posted: 09/24/2026
Shortcut: http://careers.eliassen.com/HY6zKW
Description:
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, the 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: $150,000 - $170,000/ yr. w2
Responsibilities:
- Serve as technical lead for Trellix endpoint security and data protection capabilities across the enterprise.
- Administer and engineer Trellix ePO, ENS, EDR, DLP, Drive Encryption (FRP/FRMP), TIE, DXL, Policy Auditor, Rogue System Detection, TSME, Application and Change Control (Solidcore), and 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 response capabilities.
- Develop security engineering standards, SOPs, playbooks, and operational procedures.
- Support compliance initiatives aligned with federal cybersecurity frameworks and regulations.
- Design dashboards, metrics, and operational reporting for cybersecurity stakeholders.
- Develop automation and orchestration workflows using scripting and APIs where applicable.
Experience Requirements:
- Active TS/SCI security clearance.
- 5+ years administering and engineering Trellix solutions in a large enterprise.
- 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 application whitelisting, endpoint hardening, encryption, and data protection technologies and integrating with SIEM, SOAR, threat intelligence, and identity platforms.
- 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 improving 24x7 monitoring and response.
- Ability to develop standards, SOPs, playbooks, and procedures.
- Experience supporting compliance initiatives aligned to federal frameworks and regulations; strong analytical and troubleshooting skills.
- Nice to have: 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, REST APIs; integrating Trellix telemetry with SIEM and SOAR; executive dashboards and metrics; FIM for compliance and forensics; experience with JCIP or FISMA; familiarity with threat-informed defense and automation frameworks; relevant Trellix, cybersecurity, or cloud certifications.
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.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· 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 fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contact fraud@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- 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, as indicated above