Arobas Personnel is looking for an experienced Detection Engineer for a contract opportunity with one of our clients in Montreal.

The Detection Engineer will support the organization’s Splunk-based detection environment, working closely with Incident Response, Cyber Threat Intelligence, SOC, and Red Team stakeholders to strengthen detection coverage and improve the quality of security detections.

Key Responsibilities

- Ensure operational continuity of the Splunk-based detection stack
- Review and implement rule tuning requests from the Incident Response team, including false-positive reduction, logic refinement, and threshold adjustments
- Design, develop, and deploy new Splunk detections based on threat patterns, indicators, and TTPs provided by the CTI team
- Map new and existing detections to MITRE ATT&CK; to track detection coverage
- Develop and refine detection content for Purple Team exercises, incorporating identified gaps and post-exercise improvements
- Test and validate detection effectiveness before production deployment, including true-positive validation and noise reduction
- Maintain detection logic under version control and document tuning rationale
- Track and manage work items in Jira
- Participate in handoffs and collaboration sessions with Incident Response, CTI, SOC, and Red Team stakeholders

Key Deliverables

- Tuned and updated Splunk detection rules addressing Incident Response requests, with documented rationale
- New detection use cases covering CTI-identified threat patterns, mapped to MITRE ATT&CK;
- Detection content supporting Purple Team exercises,



including post-exercise improvements
- Up-to-date documentation of detection logic and coverage gaps
- Work items properly tracked and closed in Jira

Must-Have Skills

- Robust hands-on experience with Splunk, including SPL, correlation searches, dashboards, data models, and detection-as-code workflows
- Proven Detection Engineering experience writing, tuning, and validating SIEM detection rules in a production environment
- Working knowledge of MITRE ATT&CK; for threat modeling and coverage mapping
- Familiarity with relevant security telemetry and log sources, including EDR, Windows/Linux/Sysmon, network, and cloud logs
- Experience with Threat Hunting methodologies and CTI-provided IOCs/TTPs, including structured intelligence such as STIX/TAXII or narrative reporting
- Understanding of Incident Response processes and the ability to translate tuning requests into actionable detection rule changes

Nice To Have

- Exposure to Purple Teaming and adversary emulation, including tools or approaches such as Atomic Red Team and Caldera
- Scripting skills with Python and/or PowerShell for detection logic, automation, and tooling
- Experience with Git for managing detection content as code
- Experience with Jira in an Agile or operational environment
- Ability to clearly document technical decisions and rationale for handoff to technical teams and management

Id

10059

Emplacement

Montréal

Durée De L'emploi

Temps Plein

Nombre D'emplois Vacants

1

Date Limite De Dépôt

Dernière mise à jour

26-11-04 15:21

📌 Detection Engineer (Montreal)
🏢 Arobas Personnel
📍 Montreal