Rachael Crook

About Rachael Crook

Senior Site Reliability Engineer with over 17 years of experience in infrastructure and platform engineering. At Mozilla, led the migration of critical applications from AWS to GCP, deploying solutions like Argo CD and Argo Rollouts to enhance CI/CD processes for over 200 developers while boosting system reliability and reducing costs. Pioneered a transition to platform engineering, scaling services on Kubernetes using Helm and Terraform, and empowering teams with autonomous, self-service infrastructure. Dedicated to improving developer velocity, operational efficiency, and delivering robust, scalable systems.

Experience

1. Senior Site Reliability Engineer

   Mozilla

   Jan 2023 — Present

   Led migration of 4+ business-critical applications from AWS to GCP, reducing cloud costs and improving reliability of globally used services.Deployed Argo CD and Argo Rollouts, enabling 200+ developers across multiple teams to independently manage CI/CD pipelines with safe progressive delivery, lowering deployment-related incidents.Pioneered the shift from embedded SRE to platform engineering, increasing engineer autonomy and reducing incident resolution time through standardized self-service infrastructure.Owned and scaled platform services on Kubernetes, leveraging Argo CD, Helm, and Terraform to deliver reliable systems while enhancing developer velocity with improved CI/CD pipelines, faster troubleshooting, and self-service workflows.Drove improvements to system resilience by automating operations, codifying best practices, and evolving platform patterns to reduce operational risk.Led incident response and recovery efforts, restoring critical services quickly and implementing follow-up improvements to prevent recurrence.

Education

• ITT Technical Institute

  Associates (CNS) Computer Network Systems, Computer Science, Networking

  2007 — 2009