Senior Security Engineer

The Mission

We are here to find those who strive for excellence go the extra mile and crave continuous growth.

Were an all-Australian cybersecurity firm helping some of the countrys biggest organisations stay ahead of cyber risk. Were looking for people who share our drive to learn relentlessly act with integrity and raise the bar for our clients and teammates alike those seeking a place where your drive and expertise are met with equal enthusiasm and opportunity. Dive into a culture that treasures innovation and offers a growth platform that is as limitless as your ambition and work ethic.

The Opportunity

We are looking for a highly skilled Senior Security Engineer to play a key role in improving detection quality alert fidelity and signal-to-noise ratio within our Risk Operations Centre (SOC). This role is focused on engineering high-quality detections tuning alerts and optimising security telemetry to enable efficient accurate threat response.

You will take ownership of designing refining and maintaining detection logic suppression rules and automated responses across SIEM EDR and related security platforms. The ideal candidate has deep experience working in noisy SOC environments understands how poor signal quality impacts analyst effectiveness and knows how to engineer precise actionable alerts at scale.

What Youll Do

• Design implement and maintain high-fidelity detection rules and alerting logic across SIEM and EDR platforms.
• Create test and deploy detection use cases that improve ROC efficiency while reducing alert noise.
• Develop and maintain suppression rules whitelists thresholds and enrichment logic to manage alert fatigue.
• Perform regular alert quality reviews with Security Analysts identifying tuning and optimisation opportunities.
• Map detections to the MITRE ATT&CK framework to ensure comprehensive behavioural coverage.
• Use scripting and automation (Python PowerShell APIs) to support rule deployment tuning workflows and telemetry processing.
• Collaborate closely with threat intelligence incident response and platform engineering teams to validate detections and adjust logic based on real-world threats.
• Provide senior-level technical input into incident response and escalation processes when required.
• Build and maintain clear documentation standards and repeatable tuning processes to support long-term ROC maturity.
• Design deploy and optimise tailored ROC solutions for clients assessing their network cloud and endpoint environments recommending security improvements and guiding telemetry logging and alerting strategies to strengthen detection efficacy and overall posture.

What Youll Bring

• 5 years of experience in security engineering detection engineering or advanced SOC-focused roles
• Strong hands-on experience with SIEM platforms (e.g. Splunk Sentinel QRadar Elastic) and EDR tools (e.g. CrowdStrike Microsoft Defender for Endpoint)
• Deep understanding of detection logic design alert tuning suppression techniques and false-positive reduction
• Experience working with the MITRE ATT&CK framework and developing behavioural-based detections
• Proficiency in Python PowerShell or similar scripting languages to support detection engineering and automation
• Experience designing and optimising log ingestion parsing and telemetry pipelines across cloud and on-prem environments
• Solid understanding of cloud platforms (AWS Azure) networking concepts and OS-level telemetry (Windows and Linux)
• Strong documentation skills and the ability to collaborate effectively with SOC analysts and engineering teams
• Strong understanding of security architecture principles and best practices for cloud network and endpoint environments.
• Ability to assess client environments and recommend improvements to harden systems reduce attack surfaces and enhance detection coverage over time.
• Familiarity with designing and implementing security controls in alignment with industry frameworks and standards (e.g. NIST CIS ISO 27001).

What Youll Get

• A technically excellent collaborative team
• Competitive base salary and flexibility to suit how you work best
• Clear investment in your professional growth and long-term success

Ctrl is an equal opportunity employer committed to diversity inclusion and belonging. We value diversity and welcome applicants from all backgrounds encourage anyone who meets most of the criteria to apply even if you dont tick every box.

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