GitLab is an intelligent orchestration platform for DevSecOps designed to boost developer productivity, operational efficiency, security and compliance, and digital transformation, with over 50 million registered users and more than half of the Fortune 100 trusting it to ship secure software faster, while AI is embedded as a core productivity multiplier. The Senior Security Engineer on GitLab’s Security Incident Response Team (SIRT) defends GitLab.com in a 24/7 global environment on a compressed 4-day workweek, leading end-to-end incidents and driving improvements in defense, detection, and response. Responsibilities include coordinating high-severity incident response, delivering executive communications, conducting complex DFIR investigations across cloud environments, designing detection capabilities with Signals Engineering, and building automation and AI-assisted workflows along with runbooks and playbooks. Required qualifications encompass cloud-first incident response experience, familiarity with GitLab in security/engineering contexts, SIEM/EDR/detection experience, AWS/GCP proficiency, threat intelligence familiarity, automation skills (e.g., Python, scripting, SOAR), and strong analytical and communication abilities, with a growth mindset and encouragement for applicants from underrepresented groups. The SIRT team is globally distributed across AMER, APAC, and EMEA, emphasizes cross-regional collaboration and automation, and GitLab offers remote roles, flexible PTO, equity, development funds, parental leave, and a strong commitment to equal opportunity and inclusion.