Job Summary

Catch attackers in minutes, not days. Test our own defenses at attacker speed, continuously.

The Senior Threat Engineer is a hands‑on, high‑impact role within the Enterprise Defense & Automation (EDA) team. You will engineer AI‑powered detection and response capabilities that compress attacker dwell time from days to minutes, and you will continuously red team those same defenses at attacker speed so that gaps are found by us long before they are found by an adversary.

The role sits at the intersection of threat detection engineering, adversary emulation, and applied AI. On the defensive side you will build detections and AI‑assisted response paths that triage, decide, and act autonomously within policy, moving security operations from “alert and investigate” to detect, decide, and act. On the offensive side you will run continuous, automated adversary emulation against production controls, generating a constant stream of evidence about what our defenses actually stop.

This is a builder and problem‑solver role. You will write detection logic, adversary emulation content, and automated response playbooks; instrument them with measurable outcomes such as mean time to detect, mean time to contain, and detection coverage against MITRE ATT&CK; and use AI to raise signal fidelity rather than alert volume. Every detection you ship is expected to be tested by an emulation you also ship.

Success requires strong threat fundamentals, fluency across modern detection and response platforms, and the discipline to deliver production‑grade capability that holds up in real‑world, adversarial conditions. Guardrails matter as much as speed: confidence thresholds, blast‑radius limits, and rollback paths are part of the design, not an afterthought.

If you are energized by hunting real adversaries, teaching machines to respond faster than they can, and attacking your own work before anyone else gets the chance, this role puts you at the forefront of modern cyber defense.

What you will do

AI-Powered Detection & Response — catch attackers in minutes, not days (Primary)

• Engineer high‑fidelity detections across identity, endpoint, network, cloud, and SaaS, and pair each one with an automated response path so the outcome is containment, not another alert.
• Apply AI and machine learning to triage, correlate, and enrich alerts at machine speed — clustering related signals into a single incident narrative and surfacing the attacker story instead of a queue of fragments.
• Build autonomous and semi‑autonomous response playbooks that isolate hosts, revoke sessions and tokens, disable credentials, block infrastructure, and quarantine content within minutes of first signal.
• Implement the guardrails that make autonomy safe: confidence thresholds, blast‑radius controls, human‑in‑the‑loop escalation for high‑impact actions, and tested rollback for every automated action.
• Instrument detection and response for measurable outcomes — mean time to detect, mean time to contain, false‑positive rate, and ATT&CK coverage — and drive those numbers down release over release.
• Use LLMs and agentic tooling where they earn their place: summarizing investigations, drafting containment recommendations, extracting indicators from unstructured reporting, and generating detection logic that a human reviews before it ships.

Continuous AI Red Teaming — test our own defenses at attacker speed (Primary)

• Stand up and operate continuous, automated adversary emulation against production controls, so defensive coverage is proven by evidence on a recurring cadence rather than assumed between annual assessments.
• Use AI to generate and mutate attack behavior — varying tradecraft, tooling, and sequencing across ATT&CK techniques — so detections are tested against variants rather than a single static signature.
• Close the loop from emulation to engineering: every miss becomes a detection backlog item, every noisy hit becomes a tuning task, and every fix is re‑tested automatically.
• Red team our AI itself — test detection models, agents, and prompts for evasion, prompt injection, data poisoning, and unsafe autonomous action, and remediate what you find.
• Operate emulation safely in production: scoped targets, rate limits, clear abort criteria, deconfliction with the response team, and full audit trails for every executed technique.
• Report coverage as a living metric — which techniques are prevented, which are detected, which are only logged, and which are invisible — and use it to prioritize the detection roadmap.

Threat Research & Hunting

• Track adversary tradecraft relevant to CDW and our customers, and translate intelligence into emulation plans, detections, and response actions rather than reading material.
• Run hypothesis‑driven threat hunts across SIEM, XDR, identity, and cloud telemetry, and convert every confirmed hunt technique into an automated detection so the same hunt never has to be run by hand twice.
• Map techniques to controls and automated responses once, then reuse the mapping globally across the estate.
• Lead technical deep dives on significant incidents and emulation findings, and feed the lessons back into detection content, response playbooks, and platform hardening.

Detection Engineering as Code

• Treat detection content as software: version controlled, peer reviewed, unit tested against emulation data and promoted through CI/CD with security gates that block low‑quality logic before it reaches production.
• Develop integrations and tooling in Python against platform APIs and event‑driven architectures, favoring reusable services over one‑off scripts.
• Build detection and response capability that self‑heals — identifying telemetry gaps, sensor degradation, and control drift, then correcting them or rolling back to a known‑good state without waiting for a human.
• Eliminate repeat findings through native auto‑remediation patterns rather than recurring manual cleanup.

Collaboration & Influence

• Partner closely with the Threat Response team, Cyber Defense Engineering, security platform owners, and business unit owners so that detections, emulations, and automated actions land with clear ownership boundaries.
• Contribute to shared backlogs and design reviews, and mentor engineers and analysts on detection quality, adversary tradecraft, and the safe use of AI in the defensive stack.
• Document detection logic, emulation plans, automation patterns, and engineering decisions so the capability survives any single person.

What we expect of you

• Bachelor’s degree and 7+ years of experience in threat detection engineering, threat hunting, incident response, or offensive security, or 11+ years of equivalent experience.
• Hands‑on experience building and tuning detections in SIEM platforms and cloud‑scale security tooling.
• Practical working knowledge of the MITRE ATT&CK framework, including mapping detections and automated responses to techniques.
• Experience with adversary emulation, purple teaming, breach and attack simulation, or penetration testing against production controls.
• Proficiency in Python for production‑grade automation and tooling.
• Experience applying AI/ML or LLM‑based capabilities to security problems, and designing secure, observable, and maintainable AI‑enabled solutions.
• Working experience with security automation, orchestration, or SOAR platforms.
• Built detection and response capability for large, diverse enterprise environments, a plus.
• Familiarity with platforms such as Microsoft Defender, Microsoft Sentinel, CrowdStrike, Tines, Entra ID, and Splunk, a plus.
• Familiarity with emulation and offensive tooling such as Atomic Red Team, Caldera, Cobalt Strike, or commercial breach and attack simulation platforms, a plus
• Detection‑as‑code practice: CI/CD pipelines, infrastructure‑as‑code, policy‑as‑code, and automated testing of detection content, a plus.
• Experience securing or red teaming AI systems, including prompt injection, model evasion, and agent safety testing, a plus
• Relevant certifications (GCIH, GCFA, GCTI, GPEN, OSCP, Azure Security, or cloud and automation certifications), a plus.

Pay range: $137,000 – 190,600 depending on experience and skill set.
Annual bonus target 10% subject to terms and conditions of plan.
Benefits overview: https://cdw.benefit-info.com/
Salary ranges may be subject to geographic differentials.