Marqeta
Senior Security Engineer, Detection and Response
Remote - Ontario OR British Columbia · Remote · Senior · Full-time · Posted Oct 6, 2026
- Experience
- 5+ years of hands-on security operations experience; no alternatives stated.
About the job
Leads security incident response in North American time zones and builds detection, threat-hunting, and AI-automated response capabilities.
What you'll do
- Lead investigation and response for complex security alerts and incidents, including on-call escalation.
- Engineer and optimize detections, map coverage gaps, and develop security operations automation and AI tools.
- Conduct proactive threat hunts, maintain response documentation, track effectiveness metrics, and mentor junior teammates.
What they ask for
- 5+ years of hands-on security operations experience, emphasizing Incident Response and Detection Engineering.
- Hands-on experience with enterprise security tools including EDR, NDR, CSPM, EASM, SIEM, SOAR, and cloud security platforms such as GuardDuty.
- Proficiency with MITRE ATT&CK and applying it to detection coverage.
- Strong understanding of AWS cloud services and containerization technologies.
Nice to have
- Threat hunting, cyber threat intelligence, digital forensics, or related industry certifications such as GCIH, GCFA, GIME, OSIR, or GEIR.
- Experience with Python, JavaScript, Go, Terraform, forensic or detection-as-code tools, Purple Team exercises, vulnerability validation, or Observability/SRE tools and processes.
Pay
CAD 136,800 - 171,000 (base salary)
Tools
EDR, NDR, CSPM, EASM, SIEM, SOAR, GuardDuty, MITRE ATT&CK
AI focus
Develop and use AI-driven tools and automation for security operations and incident response, including a Next-Gen Agentic SOAR.
Model-written summary · the original posting is authoritative