Senior Detection Engineer — Threat Hunting & SIEM Lead

REI (Recreational Equipment Inc.); Seattle (WA); Hybrid; USD 130,000 - 208,000; Full time

Benefits offered by this job

Employee discount

Health benefits

Retirement savings plan

Paid time off

Job summary

REI Co-op is seeking a Senior Detection Engineer to strengthen our Security Operations team in Seattle. You will build and tune alerts, hunt threats, and review security events across devices, networks, cloud services, and AI tools.

You will automate incident response with scripts and SOAR workflows, collaborating with analysts, data teams, and business partners. This remote-eligible, full-time role requires collaboration with security, engineering, and operations, with occasional travel to the

Qualifications

• Bachelor’s degree in computer science, information security, information technology, or related field.
• 5+ years in security operations, detection engineering, threat hunting, incident response, or security engineering.
• Experience creating and tuning alerts in a SIEM (Splunk or Microsoft Sentinel) and working with EDR tools (Microsoft Defender, CrowdStrike, SentinelOne).
• Knowledge of MITRE ATT&CK tactics, techniques, and procedures.
• Scripting in Python or PowerShell; ability to collaborate with technical and business teams.

Responsibilities

• Build, test, and tune threat alerts using SIEM, EDR, cloud, network, SaaS, and app tools.
• Conduct threat hunts and event reviews to contain threats and identify root causes.
• Develop workflows, reports, and SOAR integrations for faster incident response.
• Monitor AI apps, copilots, and data use to detect data loss or unsafe prompts.
• Collaborate with security, engineering, data, and business teams; participate in on-call rotations.

Skills

Python or PowerShell scripting

MITRE ATT&CK knowledge

Cross-functional collaboration

Education

Bachelor’s degree in Computer Science / Information Security / IT

Tools

Splunk

Microsoft Sentinel

Microsoft Defender

CrowdStrike

SentinelOne

Job description

REI Co-op is seeking a Senior Detection Engineer to strengthen our Security Operations team in Seattle. You will build and tune alerts, hunt threats, and review security events across devices, networks, cloud services, and AI tools.

You will automate incident response with scripts and SOAR workflows, collaborating with analysts, data teams, and business partners. This remote-eligible, full-time role requires collaboration with security, engineering, and operations, with occasional travel to the