William Castelino

• Owned and enhanced the Windows Private Cloud platform, enabling enterprise application onboarding and improving
platform capability.
• Implemented security and compliance automation, strengthening governance and reducing manual audit gaps.
• Automated operational workflows such as maintenance window alert suppression and IP cleanup scripts using PowerShell
and python, reducing incidents and resource wastage.
• Built Terraform-based automation with advanced vCenter integration parameters to improve deployment reliability and
standardization.
• Designed automated disaster recovery setup (2-server architecture with CNAME-based failover) to improve business
continuity by minimizing downtime during failures.
• Collaborated with DB and Operations teams to deliver platform features and production change requests seamlessly.
Environment: Terraform, VMware, PowerShell, Ansible, Python, AWS, OpenShift

• Designed and maintained CI/CD pipelines using Jenkins, enabling automated deployment of microservices on AWS EKS and
improving release consistency.
• Owned end-to-end CI/CD lifecycle, including pipeline design, optimization, and troubleshooting, ensuring high availability of
deployments.
• Integrated Jenkins with Terraform and AWS services, automating infrastructure provisioning and reducing manual setup
effort.
• Automated ALB and NLB provisioning using Terraform via Jenkins pipelines, accelerating standardized environment creation.
• Resolved CI/CD pipeline and AWS infrastructure issues, improving deployment success rates and platform stability.
• Led a 7-member offshore team, ensuring timely delivery, quality standards, and adherence to SLAs.
• Collaborated with clients and stakeholders to design scalable and reliable deployment workflows.
Environment: AWS, EKS, Jenkins, Terraform, Kubernetes, Azure AD

• Delivered cloud platforms across AWS and Azure using Terraform, enabling scalable multi-environment deployments.
• Implemented CI/CD pipelines in Azure DevOps, automating infrastructure delivery and reducing manual intervention.
• Enforced infrastructure quality using TFLint, reducing configuration errors before deployment.
• Developed automated infrastructure tests using Terratest, improving reliability and preventing regressions in Terraform
modules.
• Led Terraform and provider upgrades, ensuring platform stability while adopting new features.
• Improved infrastructure code quality and performance through refactoring and optimization.
• Mentored junior engineers, enhancing team capability and reducing onboarding time.
Environment: AWS, Azure, Terraform, Azure DevOps, TFLint, Terratest