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Senior Systems Engineer – Endpoint Security

CACI
Fort Meade, USA
Full-time
Onsite
Discovered 3 weeks ago
Microsoft Defender for EndpointTrellix HXKusto Query Language (KQL)YARAWindowsLinux
Free

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Microsoft Defender for EndpointTrellix HXKusto Query Language (KQL)
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Job Overview

CACI is seeking a Senior Systems Engineer to lead the National Security Agency’s Enterprise Endpoint Detection and Response (EDR) Program.

The role involves strategic architecture, integration, and optimization of endpoint security platforms, including Microsoft Defender for Endpoint (MDE) and Trellix HX.

This position requires a deep understanding of Windows, Linux, and macOS internals, as well as experience with MDE and Trellix HX.

Responsibilities

  • Lead the full lifecycle engineering and scale-out architecture of MDE and Trellix HX across hybrid environments, including on-premises, cloud, and virtual desktop infrastructures (VDI).
  • Develop advanced system engineering documentation, deployment strategies, and implementation plans.
  • Optimize agent configurations, exclusion policies, and system performance to ensure mission success and minimize friction across high-demand environments.
  • Monitor and maintain enterprise endpoint health at scale.
  • Work directly with threat hunters and intelligence analysts to convert actionable intelligence into custom technical indicators of compromise (IOCs) using KQL and YARA.
  • Serve as a primary technical advisor to Government stakeholders regarding system risks, design decisions, and engineering recommendations.
  • Provide advanced forensic and technical support to the SOC during high-priority incidents.
  • Mentor junior and mid-level engineers, fostering growth, collaboration, and technical excellence.

Qualifications

  • 20+ years of experience as a Systems Engineer on programs of similar scope, type, and complexity.
  • Proven experience planning and leading Systems Engineering efforts.
  • Bachelor’s degree in Systems Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or a related field from an accredited institution.
  • Five (5) additional years of Systems Engineering experience may be substituted for a bachelor’s degree.
  • Hands-on engineering experience with MDE architecture, deployment via MECM/SCCM or Intune, policy ring management, and advanced hunting using Kusto Query Language (KQL).
  • Proven ability to engineer, deploy, and manage Trellix HX controllers and agents within air-gapped or highly restricted networks, including creating OpenIOC and YARA rules.
  • Deep understanding of Windows, Linux, and macOS internals, including file systems, registries, and process execution behavior.
  • Experience with Model-Based Systems Engineering (MBSE), Cameo, and Atlassian suite tools such as Jira and Confluence.
  • Familiarity with NSA Technical Manual standards (e.g., NSA DS-89) and defense-in-depth engineering principles.
  • Demonstrated collaboration skills, transparency in managing high-consequence systems, and a passion for developing and mentoring technical talent.

Benefits

  • Comprehensive benefits such as healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

About CACI

CACI is committed to integrity, innovation, and ensuring the safety of our nation.

CACI values the unique contributions of every employee and offers a flexible work environment with robust learning resources.

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