Senior Threat Detection Engineer

Cribl

20h•$108,000 - $169,000•Remote

About The Position

Join the company that’s building the telemetry infrastructure for the AI era. At Cribl, we partner with IT and Security teams at many of the world’s biggest enterprises, including half of the Fortune 100, to bridge the gap between AI ambition and infrastructure reality. As the AI Platform for Telemetry, we give customers the choice, control, and flexibility to manage and analyze telemetry for both humans and agents, so they can build what’s next. We’re one of the fastest‑growing private companies and a leading player in a massive, fast‑moving market. With a global workforce, we’re remote‑first and grounded in a simple idea: software is a people business. Cribl is the place where curious, collaborative people can do their best work, grow fast, and bring their full selves to the herd. Cribl builds telemetry infrastructure for some of the world's biggest security teams. Now we're looking for someone to protect Cribl itself. You'll join Cribl's internal security team, Team Alpine, to run detection as code. Our team runs a detection as code pipeline where rules live in Git, are tested in CI, and deploy to our SIEM automatically. AI agents watch for coverage gaps and help review every change. This is a hands-on senior role covering the whole detection lifecycle. You'll hunt for threats nobody has written a rule for yet, turn what you find into detections, and keep the log pipelines behind those detections healthy. For the first [6–12] months you'll also be a core part of our incident response rotation while we build out that function. You'll lead investigations, and what you learn will feed straight back into the detections. If you want your work to show up in production quickly, and you like owning the data as well as the rules, this role is for you. You will partner closely with Product Security, IT, and Legal teams, and report to the Sr. Director, Security Engineering and Operations under the CISO.

Requirements

[5+] years in security operations, with significant hands-on time in detection engineering, threat hunting, or incident response
Experience writing and maintaining detections as code in a modern SIEM
Strong Python skills and comfort with Git-based workflows, code review, and CI/CD
Strong in KQL for writing detection queries
Working knowledge of MITRE ATT&CK and how to use it for coverage analysis, not just labeling
Experience investigating incidents in cloud (AWS, GCP, and/or Azure), SaaS, and identity providers
Hands-on experience with log pipelines: getting data in, parsing it, and fixing it when it breaks
The judgment to separate a real signal from noise, and to know when to escalate
Clear writing for both technical and non-technical audiences: incident summaries, runbooks, detection docs
Uses AI as a routine part of engineering work, with concrete examples of how it has changed how you build, test, or investigate

Nice To Haves

Bonus: experience with Cribl Stream or other telemetry pipeline tools
Bonus: experience with Sigma rules, adversary emulation (Atomic Red Team, Caldera, or similar), or purple teaming
Bonus: experience building agentic or AI-assisted workflows for security operations
Bonus: certifications such as GCIH,GCDA, or equivalent experience

Responsibilities

Design, build, test, and tune detections as code (KQL) through a GitOps workflow: issue, pull request, unit and back-testing, then automated deployment
Map detections to MITRE ATT&CK, find coverage gaps, and decide where to invest next based on our threat model
Review new community and vendor rule releases, such as Sigma, and decide what to adopt, adapt, or skip
Cut alert noise by tuning, retiring rules that no longer earn their place, and tracking detection quality metrics
Plan and run hypothesis-driven hunts across cloud, SaaS, identity, endpoint, and corporate infrastructure telemetry
Use adversary emulation to generate test events for detections that have nothing to fire on yet
Turn hunt findings into durable detections, documentation, and backlog items
Take part in the IR rotation: triage, scope, contain, and investigate security incidents from first alert to closure
Run retrospectives and turn the lessons into new detections, playbook updates, and fixes to visibility gaps
Write and maintain runbooks so others on the team can respond consistently
Assist in ownership of the health of security log flow: onboard new sources, maintain parsing and normalization, and monitor for dropped, delayed, or malformed data
Assist and Build and maintain data pipelines with Cribl Stream to route, enrich, and reduce telemetry before it reaches the SIEM
Maintain the CI/CD and automation behind the detection program, including GitHub Actions, SIEM API integrations, and AI-assisted gap analysis and PR review
Work independently, and design the processes, standards, and tools that help others work well
Mentor teammates through code review, pairing, and clear documentation
Work with IT, Infrastructure, Engineering, and GRC to close visibility gaps and improve detection coverage
This position will require stand-by, on-call, or off-hours duties