Senior Cyber Security Engineer - Blue Team

The Role Teneo seeks a skilled and self-sufficient Cybersecurity Engineer to join our security team in Melbourne. In this role you will focus primarily on detection engineering and blue-team operations: designing, writing and tuning detection / SIEM / XDR rules, responding to security alerts and incidents, and maintaining our security posture across cloud, network and endpoint environments. You will play a critical role in strengthening our defences, automating security processes, and enabling IT and business teams to operate securely.   The position follows a hybrid working model, with three days per week in the office. Responsibilities Design, develop, and maintain detection logic and rules (SIEM / XDR / log-management) to identify suspected malicious activity, anomalies, or policy violations across network, cloud, endpoint, and identity systems. Configure, deploy, and manage security tooling: SIEM / XDR platforms, log management, IDS/IPS/NDR, firewalls, endpoint protection, cloud-security tools, and other security infrastructure. Triage and investigate alerts: perform log analysis, correlate events, determine real threats, escalate or respond as needed. Perform vulnerability assessments, threat hunting, risk-based tuning of detection rules, and threat modelling for identified CVEs / weaknesses. Participate in incident response: containment, mitigation, root-cause analysis, remediation, documentation, lessons-learned, and improvement of detection strategies. Automate security operations where possible: develop scripts or workflows (e.g., via Python, PowerShell, Bash, SOAR integrations) to streamline monitoring, alerting, incident handling, and reporting. Collaborate with IT, DevOps, and business stakeholders to embed security best practices into system and network architecture, cloud infrastructure, and software deployments. Maintain and enforce security policies, standards, access controls, and compliance frameworks (e.g., relevant regulatory or industry standards). Produce clear documentation, dashboards, reports, and run-books for detection logic, incidents, and ongoing security operations.   Requirements Must-have Several years (e.g., 5–7+) of professional experience in cybersecurity engineering / operations, with hands-on experience in detection, SIEM/XDR, log management, incident response, and security tool administration. Strong technical knowledge in network security, cloud security (e.g., AWS, Azure, or similar), endpoint security, identity and access management (IAM), firewall/IDS/IPS, and intrusion detection/prevention. Proven ability to author, tune and review detection rules / alerts / log-parsing logic, and to perform advanced log analysis and event correlation. Familiarity with scripting or automation (e.g., Python, PowerShell, Bash), for building detection logic, automating response, or managing security tool configurations. Solid understanding of security frameworks, best practices, and threat-detection methodologi...