Senior Security Engineer, Security Incident Response Team (SIRT)

GitLab

17h•Remote

About The Position

As a Senior Security Engineer on GitLab’s Security Incident Response Team (SIRT), you will play a critical role in defending GitLab.com and the broader GitLab environment against evolving security threats. This role also supports our FedRAMP environment and requires U.S. citizenship and residency within the United States. 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.

Requirements

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
Due to government requirements, you must be a United States Citizen (defined as any individual who is a citizen of the United States by law, birth, or naturalization) to fill this position.

Responsibilities

Lead and coordinate end-to-end incident response for high-severity security events within a 24/7 global on-call model, with this role operating during U.S. business hours.
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
Partnering with Signals 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