Endpoint Security Engineer

NikSoft Systems Corp.•,

1d•Remote

About The Position

NikSoft Systems Corporation is seeking an Endpoint Security Engineer to join its team in support of the United States Postal Service's Cybersecurity program. In this role, you will design, deploy, and operationalize active, behavior-based endpoint detection and response (EDR/XDR) capabilities across a large enterprise fleet. You will maintain a rigorous security posture across traditional end-user computing devices, on-premises servers, and multi-cloud workloads. The position involves balancing proactive protection with business continuity by partnering with end-users and application owners to tune policies and providing technical escalations to Security Operations Center (SOC) analysts and IT Operations staff.

Requirements

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.
Deep understanding of Windows/Linux kernel architectures, API hooking, hypervisor isolation, and multi-cloud workload identity integrations.
Strong programming/scripting abilities in PowerShell, Python, or Bash to orchestrate fleet-wide remediations and automate policy compliance at scale.
Fluency applying appropriate AI/ML technologies and analytics platforms (Splunk, Databricks, Elastic) to streamline and/or automate activities including but not limited to research, developing documentation, and supporting development of executive communications.
Fluency applying appropriate AI/ML technologies to automate security activities to improve timeliness or full automation of event response activities.
Proven ability to balance stringent security controls with business operational velocity, ensuring minimal disruption to end-user productivity and mission-critical COTS/proprietary software.
Capable of methodically triaging active enterprise threats under pressure and articulating complex host-based attacks to executive leadership.
Mindset geared toward "Infrastructure-as-Code" and policy automation rather than manual device-by-device intervention.
7+ years of progressive experience in technical cybersecurity engineering or infrastructure security roles.
At least 3–5 years directly engineering and administering enterprise-grade EDR/XDR platforms across 50,000+ endpoints in a distributed hybrid environment.
Demonstrated track record supporting active SOC investigations and collaborating cross-functionally with system owners in large-scale enterprise environments.
Bachelor's degree in Computer Science, Cybersecurity, Information Systems, or equivalent practical enterprise experience.
Ability to obtain a Postal Sensitive Clearance (US Citizenship or Green Card required).
Must not have traveled outside of the USA for a combined period not to exceed 6 months within the last 5 years.

Nice To Haves

GIAC Certified Enterprise Defender (GCED), GIAC Certified Incident Handler (GCIH), or GCFA (Forensic Analyst).
CISSP (Certified Information Systems Security Professional).
Specialized Vendor Engineering Credentials (e.g., CrowdStrike Certified Falcon Administrator/Hunter, Microsoft Certified: Security Operations Analyst Associate / SC-200).

Responsibilities

Engineer, deploy, and maintain Next-Gen Antivirus (NGAV) and Endpoint Detection & Response (EDR/XDR) agents 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.
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.
Manage allowlisting, exception workflows, and phased ring deployments (canary/pilot/production).
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.
Extend endpoint security standards across private data center virtualization layers and ephemeral multi-cloud infrastructure.
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.