Guilherme worked on the GoogleCloudPlatform/cloud-foundation-toolkit repository, focusing on governance improvements for secured data warehouse infrastructure. He updated Terraform configurations using HCL to add erlanderlo as a maintainer alongside lanre-OG for both the terraform-google-secured-data-warehouse and sdw-onprem-ingest modules. This maintainership update clarified ownership and accountability, supporting faster onboarding and a stronger security posture. While no new features or bug fixes were delivered beyond this governance change, the work demonstrated a solid understanding of DevOps practices and Infrastructure as Code principles. The update was documented in commit 4ffb52e5b6e7c640e2db0237a4d0afe6b36fab5d (#3105).