Endpoint Security Engineer; EDR​/XDR); Hybrid

Overview

• Tier One Technologies has an immediate need for an Endpoint Security Engineer for our US Government client.
• This hybrid Contract-to-Hire position will be available to start in Falls Church, VA, Morrisville, NC or Eagan, MN
• SELECTED CANDIDATES WITHOUT REQUIRED CLEARANCE WILL BE SUBJECT TO A FEDERAL GOVERNMENT BACKGROUND INVESTIGATION TO RECEIVE IT.

• Design, deploy, and operationalize active, behavior-based endpoint detection and response (EDR/XDR) capabilities across the client’s network.
• Balance proactive protection with business continuity - partnering directly with end-users and application owners to tune policies and eliminate operational friction, while providing tier-3/tier-4 technical escalations to Security Operations Center (SOC) analysts and IT Operations staff during active investigations.
• Fleet-Wide Behavioral Defense & Control Engineering:
  • Engineer, deploy, and maintain Next-Gen Antivirus (NGAV) and Endpoint Detection & Response (EDR/XDR) agents (e.g., Crowd Strike Falcon, Microsoft Defender for Endpoint, Sentinel One) across hundreds of thousands of heterogeneous endpoints.
  • Implement active behavioral protections against zero-day malware, living-off-the-land binaries (LotLBs), fileless execution, and credential dumping.
• Application Owner & End-User Engagement (Business Impact Management):
  • Serve as the primary technical partner to application owners and business units, establishing baseline behavior profiles to minimize false positives, performance degradation, or operational downtime across critical retail, logistics, and supply chain applications.
  • Manage allow listing, exception workflows, and phased ring deployments (canary/pilot/production) to ensure silent, high-efficacy protection without disrupting day-to-day warehouse or logistics operations.
• SOC & IT Operations Event Investigation Support:
  • Act as endpoint security escalation lead for SOC analysts during high-severity threat detection and response events.
  • Act as endpoint operations escalation lead for IT administrators during high-impact event investigation and remediation efforts.
  • Perform advanced host forensics, process-tree reconstruction, memory analysis, and script-based live remediation (e.g., host isolation, automated artifact collection, registry rollbacks).
• Hybrid & Multi-Cloud Workload Protection:
  • Extend endpoint security standards across private data center virtualization layers (VMware/Nutanix) and ephemeros multi-cloud infrastructure (EC2, Azure VMs, Compute Engine, containerized hosts).
• Control Efficacy & Continuous Validation:
  • Continuously measure and test security control efficacy using automated attack simulation (BAS) tools and Purple Team exercises.
  • Track and report on agent health, tamper-resistance, telemetry pipeline integrity, and coverage metrics aligned with enterprise asset management systems.

• Bachelor’s or Master’s degree in Computer Science, Information Security or related field. If an individual's degree is not in the applicable field, then 4 additional years of related experience is required.
• 7+ years of progressive experience in technical Cybersecurity engineering or infrastructure security roles.
• 3+ years of directly engineering and administering enterprise-grade EDR/XDR platforms across 50,000+ endpoints in a distributed hybrid environment.
• Expert-level proficiency administering enterprise-scale endpoint platforms across Windows, macOS, Linux distributions, and container runtime environments.
• Deep mastery of process lineage, behavioral IOAs (Indicators of Attack), Sysmon telemetry, and detection authoring using query languages such as SQL, KQL (Kusto Query Language), Splunk SPL, or YARA.
• Demonstrated track record supporting active SOC investigations and collaborating…