Act Digital is an international technology and cybersecurity consulting company supporting major organizations across digital transformation, cyber defense and security operations.
Within our cybersecurity activities, we support large enterprise and financial-sector clients on topics including:
SOC operations
Offensive security
Purple teaming
We are currently looking for a Detection Engineer to join a major financial-sector workplace in Montreal.
About the Role As a Detection Engineer, you will help improve and validate cybersecurity detection capabilities against modern attacker techniques.
This role combines detection engineering, purple teaming and offensive validation activities. The objective is not only to create detections, but also to continuously test and improve their effectiveness against realistic attack scenarios.
You will work closely with SOC, Incident Response and Security Engineering teams to strengthen detection coverage and defensive maturity across the environment.
Main responsibilities include:
Reviewing and improving existing detection use cases
Developing new detection logic and behavioral analytics
Validating detections through offensive testing and adversary simulation
Identifying detection gaps across endpoint, identity, network and cloud environments




Simulating attacker techniques mapped to MITRE ATT&CK;
Improving detection quality and reducing false positives
Supporting continuous improvement of monitoring and response capabilities
Qualifications 3+ years of experience in cybersecurity
Experience in Detection Engineering, Threat Detection, SOC or Purple Teaming
Hands-on experience with offensive security techniques or adversary simulation
Experience working in enterprise or regulated environments
Strong understanding of modern attack techniques and intrusion methodologies
Required Skills SIEM and EDR technologies
Detection use case development and tuning
MITRE ATT&CK; framework
Log analysis and event correlation
Offensive security fundamentals
Scripting skills (Python, PowerShell and/or Bash)
Windows security and Active Directory knowledge
Solid analytical and investigation capabilities
Preferred Skills Experience in financial or highly regulated environments
Experience with purple teaming or adversary simulation
Experience with detection-as-code methodologies
Knowledge of threat hunting methodologies
Familiarity with Windows internals, Active Directory and cloud environments
Knowledge of modern attack chains, lateral movement and privilege escalation techniques

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📌 Cybersecurity Detection Engineer / Purple Team (Quebec City)
🏢 act digital
📍 Quebec City