Principal Engineer/Microsoft Endpoint for Defender Enterprise

Fuse Engineering LLC • Fort Meade, MD

4d

About The Position

The Senior Systems Engineer (Level 3) serves as a principal technical leader and subject matter expert within the National Security Agency’s Enterprise Endpoint Detection and Response (EDR) Program. Operating in a highly classified, multi-domain infrastructure, the successful candidate will drive the strategic architectural design, end-to-end integration, deployment, and optimization of premier endpoint security platforms, specifically Microsoft Defender for Endpoint (MDE) and Trellix HX. This critical role bridges high-level systems architecture with operational defense capabilities, ensuring total endpoint visibility, robust threat containment, and resilient configuration management across all enterprise and mission-critical assets to defend national security infrastructure against sophisticated cyber threats.

Requirements

• Top Secret SCI w/ Maryland Polygraph Security Clearance Required
• Microsoft Defender for Endpoint (MDE) Expertise: Proven engineering experience with MDE architecture, deployment strategies via MECM/SCCM or Intune, policy ring management, and advanced hunting using Kusto Query Language (KQL).
• Trellix HX Expertise: Demonstrated experience engineering, deploying, and managing Trellix HX (formerly FireEye) controllers and agents within air-gapped or highly restricted networks, including the creation of OpenIOC and YARA rules.
• Operating System & Forensic Knowledge: In-depth technical understanding of Windows, Linux, and macOS internals, including file systems, registry structures, and process execution mechanics.
• Professional Standards: Compliance with DoD 8570/8140 IAM Level II or III baseline certifications.

Nice To Haves

• Vendor Certifications: Microsoft Certified: Security Operations Analyst Associate (SC-200), Azure Security Engineer Associate (AZ-500), or Trellix Certified Engineering credentials.
• Methodologies & Toolsets: Experience with Model-Based Systems Engineering (MBSE), Cameo, and workflow management within the Atlassian Suite (Jira, Confluence).
• Technical Frameworks: Familiarity with NSA Technical Manual Standards (e.g., NSA DS-89) and defense-in-depth engineering principles.
• Core Competencies: Strong record of team collaboration, exceptional transparency in managing high-consequence infrastructure, and an aptitude for developing technical leadership pipelines.

Responsibilities

• Leading the lifecycle engineering and scale-out architecture of MDE and Trellix HX across hybrid environments, including on-premises, cloud, and virtual desktop infrastructures (VDI).
• Authoring complex system engineering and implementation plans.
• Tuning agent configurations and exclusion policies to eliminate mission friction.
• Monitoring overall endpoint health at scale.
• Collaborating closely with threat hunting and intelligence analysts to translate actionable threat intelligence into custom technical indicators of compromise (IOCs), utilizing Kusto Query Language (KQL) and YARA rules.
• Acting as a primary technical advisor to Government stakeholders on system risks and engineering considerations.
• Providing advanced forensic support to the SOC during critical high-priority incidents.
• Actively mentoring junior and mid-level engineering personnel within the program.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed