Senior Trellix Cybersecurity Engineer​/RMF ISSO – TS​/SCI

Clearance: Active TS/SCI Clearance Required
Citizenship: U.S. Citizen Required
Experience: 11-13 years of relevant experience
Education: Bachelor's Degree in Computer Science or related field
Position Type: Full-Time Permanent
Location: On-Site at Suffolk Building (no remote/hybrid option)

ZTI is seeking a Senior Trellix Cybersecurity Engineer with RMF ISSO expertise to architect, implement, and manage a comprehensive Trellix security environment while supporting RMF compliance activities for a high-visibility Chief Digital and Artificial Intelligence Office (CDAO) mission focused on AI/ML development and securing advanced data systems
.
This role requires expertise in deploying Trellix from the ground up
, configuring and managing all modules, performing STIG compliance across integrated devices including Microsoft SQL, and ensuring cybersecurity compliance through direct ISSO responsibilities. The candidate will support AI/ML development environments to ensure their security posture meets DoD and CDAO mission objectives.
This is a full-time permanent on-site role at the Suffolk Building with an immediate hire
, offering a starting salary between $160,000 and $190,000
, based on qualifications and experience.

• Architect, install, configure, and manage Trellix ePO and associated modules from initial deployment to operational sustainment.
• Integrate Trellix with Microsoft SQL databases, ensuring optimal performance, availability, and security compliance.
• Develop and implement STIG hardening for all systems associated with Trellix deployment, including endpoints, servers, and databases.
• Configure and manage endpoint security, DLP, threat prevention, and advanced Trellix modules to support CDAO AI/ML mission security requirements.
• Conduct vulnerability assessments and remediate findings to maintain system compliance with DoD and CDAO security standards.
• Develop operational documentation, SOPs, and as-built configurations for sustainment.
• Collaborate with security teams, system administrators, and data engineers to integrate Trellix into AI/ML workflows securely.
• Provide Tier III support and subject matter expertise for all Trellix-related issues and projects.

• Serve as Information System Security Officer (ISSO) for assigned AI/ML systems.
• Support development, implementation, and maintenance of RMF packages, including System Security Plans (SSPs), Security Assessment Reports (SARs), and Plans of Action and Milestones (POA&Ms).
• Conduct continuous monitoring activities, vulnerability scanning, and security control assessments.
• Coordinate with the Information System Security Manager (ISSM) and Authorizing Official (AO) to maintain system Authorization to Operate (ATO) status.
• Ensure security requirements are integrated into system designs supporting AI/ML operations.
• Maintain knowledge of evolving DoD, RMF, and CDAO cybersecurity policies to ensure compliance and proactive risk management.

• 11-13 years of cybersecurity engineering experience
  , with significant hands-on expertise in Trellix (McAfee) architecture and administration.
• Bachelor’s Degree in Computer Science, Cybersecurity, or related field.
• Active TS/SCI Clearance required.
• 8570 IAT II compliant certification (e.g., Security+, CCNA Security, CySA+, GICSP, GSEC, SSCP).
• Cloud Security Certification (e.g., AWS Certified Security – Specialty, CCSK, CCSP, Azure Security Engineer Associate).
• Expert-level knowledge in deploying and managing Trellix ePO
  , Threat Prevention, DLP, and associated modules in DoD environments.
• Demonstrated experience setting up Trellix from scratch
  , including policy configuration, system deployment, and integration with…