Senior Security Engineer, Incident Response Team (Australia)

Description

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster.

The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software.

Fortune 500 is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab.

An overview of this role

As a Senior Security Engineer on GitLab's Security Incident Response Team (SIRT), you will be on the frontline of protecting both GitLab.com and GitLab the company from security threats.

You will lead high-impact incidents and investigations, drive continuous improvements in defense, detection and response capabilities, and help scale security operations through automation and intelligent workflows.

Operating within a 24/7 global environment (follow the sun model), you will own incidents end-to-end - from detection and triage through containment, eradication, and recovery - while partnering cross-functionally to strengthen GitLab’s overall security posture. A key aspect of this role is leveraging automation and AI-driven approaches to improve detection fidelity, accelerate investigations, and reduce response times. You will help shape how modern tooling and data are applied to stay ahead of evolving adversary tactics.

This role is ideal for someone who thrives in high-tempo environments, brings strong DFIR expertise, and is equally passionate about operational excellence and building scalable detection and response systems and workflows.

Find out more about the Security Operations team and responsibilities here:

Incident Response

Trust and Safety

Red Team

Threat-Intelligence

Detection Engineering

The Security Incident Response Team (SIRT) is a globally distributed team of engineers split across 3 core regions; AMER, APAC and EMEA, and is at the forefront of security events that impact both GitLab.com and GitLab cloud and corporate environments. We are both reactive and proactive, leading security investigations, incident response support and response resolution, through to cyber threat analysis and detection and response engineering. Even though we’re a global team, we work together in a cross-regional manner and have automation and processes to facilitate collaboration when resolving incidents, handovers, and general collaboration for project work as well.

How GitLab Supports Full-Time Employees

Benefits to support your health, finances, and well-being

Flexible Paid Time Off

Team Member Resource Groups

Equity Compensation & Employee Stock Purchase Plan

Growth and Development Fund

Parental Leave

Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application.

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GitLab is proud to be an equal opportunity workplace and is an affirmative action employer. GitLab’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharge status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans, and Armed Forces service medal veterans), or any other basis protected by law. GitLab will not tolerate discrimination or harassment based on any of these characteristics. See also GitLab’s EEO Policy and EEO is the Law . If you have a disability or special need that requires accommodation , please let us know during the recruiting process .

Responsibilities

• Lead and coordinate end-to-end incident response for high-severity security events. SIRT operates a 24/7 follow the sun model across AMER, APAC and EMEA. This role covers the APAC window and participates in a rotating on-call schedule.
• Prepare clear executive communications that keep stakeholders informed during incidents
• Investigate complex security incidents across cloud environments, applying strong Digital Forensics and Incident Response (DFIR) methodologies
• Partner with Detection Engineering to design and implement detection capabilities, including SIEM use cases, alerting strategies, and telemetry pipelines
• Build and enhance automation and AI-assisted workflows to improve triage, investigation speed, and response consistency
• Partner with Threat Intelligence to contextualize threats and improve detection coverage
• Conduct root cause analysis (RCA) and lead post-incident reviews to drive continuous improvement and risk reduction
• Develop and maintain runbooks, playbooks, and operational documentation
• Collaborate cross-functionally (Engineering, Infrastructure, Legal, Product, Communications, etc) during incidents and lead proactive initiatives (e.g. tabletops)
• Mentor other engineers and help elevate the team’s overall incident response maturity
• What you’ll bring
• Strong experience in security incident response and investigations in cloud-first environments
• Experience using or administering Git/GitLab in a security or engineering context
• Hands-on experience with SIEM, EDR, and/or detection engineering
• Experience with cloud platforms (AWS & GCP)
• Familiarity with threat intelligence and adversary tactics (e.g., MITRE ATT&CK)
• Experience building or working with automation (e.g., Python, scripting, SOAR platforms)
• Interest or experience in applying AI/ML or data-driven techniques to detection, triage, or response workflows
• Strong analytical and problem-solving skills; ability to operate effectively during high-severity incidents
• Excellent written communication skills with a passion for clear, actionable documentation
• Growth mindset with a proactive approach to identifying and mitigating security risks