Senior Security Engineer - Threat Intelligence & Detection; Hybrid - Seattle

Senior Security Engineer

This role is offered as hybrid in Seattle, WA. Candidates must be available to work in office at the Nordstrom corporate headquarters a minimum of 4 days/week to be considered for this position.

The Senior Security Engineer on the TIDE team is a hybrid practitioner who writes detection rules, hunts adversary activity across the data lake, and builds the automation that ties it all together. This role requires functional depth in at least two of the following domains: detection engineering, threat intelligence, threat hunting, security automation, investigation analysis, and incident response.

This role reports to the Sr. Manager of Threat Intelligence & Detection Engineering and serves as a lead technical contributor on the TIDE team, with independent project horizons of up to 120 days.

Responsibilities

Detection Engineering

• Design, develop, and maintain high-fidelity detection rules in Crowd Strike NG-SIEM (Log Scale /CQL) across endpoint, email, identity, network, and cloud domains
• Operationalize the full detection lifecycle: threat modeling, logic development, empirical testing, deployment, tuning, and retirement
• Build detection content aligned to MITRE ATT&CK, threat actor TTPs, and internal threat model priorities
• Translate threat intelligence findings, incident post-mortems, and hunt discoveries into durable detection logic
• Enforce detection engineering standards including taxonomy, quality criteria, and review processes

Threat Intelligence

• Collect, analyze, and operationalize tactical and technical threat intelligence from open-source, commercial, and internal sources
• Produce actionable intelligence products including threat actor profiles, TTP summaries, and IOC packages that directly inform detection priorities and hunting hypotheses
• Monitor threat actor campaigns targeting retail and e-commerce environments across email, endpoint, identity, supply chain, and insider risk vectors
• Collaborate with CSIRT and SOC to enrich active investigations with adversary context
• Apply AI-assisted tooling to accelerate intelligence processing, IOC enrichment, and adversary research

Threat Hunting

• Design and execute hypothesis-driven threat hunts across endpoint, email, identity, network, and cloud telemetry
• Apply structured hunting methodologies (MITRE ATT&CK-based, data-driven, indicator-based) to surface undetected adversary activity
• Document hunt outcomes—including negative results—and feed confirmed patterns back into the detection library
• Maintain visibility into coverage gaps and drive new hunt-to-detect cycles to close them

SOC & Incident Response Support

• Provide technical escalation support for complex incidents involving identity compromise, endpoint intrusion, lateral movement, and data exfiltration
• Conduct targeted forensic and log-based analysis during active investigations, contributing to root cause determination and containment decisions
• Develop and maintain investigation runbooks and analyst guidance to improve SOC response fidelity
• Translate post-incident lessons learned into detection and hunting improvements

Automation and Tooling

• Build and maintain automation that accelerates detection deployment, alert triage, case enrichment, and threat intel processing
• Develop integrations between SIEM, EDR, email security, SOAR, and threat intelligence platforms to reduce analyst toil
• Apply scripting (Python, Power Shell) to operationalize repetitive workflows including IOC ingest, log parsing, and detection validation
• Leverage AI and machine learning tools to improve detection quality, reduce false positive rates, and accelerate triage

Collaboration and Mentorship

• Mentor less experienced team members through code review, knowledge transfer, and structured guidance
• Partner with SOC, IAM, Platform Engineering, Email Security, and Cloud teams to ensure telemetry quality and detection coverage
• Contribute to cross-functional initiatives including purple team exercises, tabletop scenarios, and platform migration readiness

Required Qualifications

• 4+ years of professional experience in detection engineering, threat intelligence, SOC/IR, threat hunting, or security automation
• Demonstrated proficiency writing…