Job Description: The Cyber Use Case Developer is responsible for designing, developing, testing, and continuously improving security monitoring use cases that detect suspicious activity, policy violations, and potential cyber threats across enterprise environments.

This role works closely with Security Operations, Threat Hunting, Cyber Threat Intelligence, Incident Response, and various teams to translate threat behaviours, business risks, and operational requirements into actionable detection logic and high-quality alerts.

The analyst plays a key role in strengthening the organizations ability to identify threats early, reduce false positives, improve alert fidelity, and support timely investigation and response.

Qualifications Post-secondary education in Cyber Security, Information Technology, Computer Science, Information Systems, or a related field, or equivalent practical experience.

Experience in security operations, detection engineering, threat hunting, incident response, cyber threat intelligence, or a related cyber security function.

Hands-on experience working with SIEM, EDR, XDR, cloud security, identity, network, or endpoint telemetry.

Experience writing detection logic or search queries using languages such as SPL, KQL, SQL, Sigma, YARA, Python, Power

Shell, or similar.

Strong understanding of common attacker behaviours, malware techniques, persistence methods, lateral movement, credential abuse, phishing, data exfiltration, and cloud or identity-based attacks.

Familiarity with security frameworks and methodologies such as MITRE ATT&CK;, Cyber Kill Chain, NIST, CIS Controls, or similar.

Ability to analyze large volumes of security data and identify patterns, anomalies, and actionable findings.

Strong documentation, communication, and stakeholder management skills.

Responsibilities Develop, enhance, and maintain cyber security detection use cases across SIEM, EDR, XDR, cloud, identity, network,



and endpoint data sources.

Translate adversary tactics, techniques, and procedures into practical detection logic aligned to frameworks such as MITRE ATT&CK.;

Map detection use cases to MITRE ATT&CK; framework to ensure comprehensive adversary coverage.

Write, test, and tune detection rules, search queries, analytics, and alert logic.

Perform use case lifecycle management, including requirements gathering, design, development, validation, deployment, tuning, documentation, periodic review and retirement.

Analyze security telemetry, logs, alerts, and incident data to identify detection gaps and opportunities for improvement.

Partner with Threat Hunting team to convert hunt findings into permanent detection use cases.

Partner with Threat Intelligence team to operationalize intelligence into monitoring content and proactive detection capabilities.

Collaborate with Defensive Security and Incident Response teams to ensure use cases generate actionable, high-fidelity alerts with explicit triage guidance.

Conduct false-positive analysis and continuously tune detection content to improve precision, reduce noise, and increase operational efficiency.

Document use case logic, data source dependencies, alert handling instructions, validation results, and performance metrics.

Support purple team, attack simulation, tabletop, and control validation activities to test and improve detection coverage.

Track use case performance through metrics such as alert volume, true-positive rate, false-positive rate, coverage, and mean time to detect.

Stay current on emerging threats, attack techniques, vulnerabilities, and security monitoring best practices.

This role requires .

In addition to a law enforcement inquiry and a credit check, as part of your application, the Government of Canada will ask if you lived or travelled outside of Canada for 6-consecutive months during the last 5 years, and you must account for all activities during this time.

📌 Cyber Use Case Developer (Toronto)
🏢 Sun Life
📍 Toronto