Worked on the openbraininstitute/aws-terraform-deployment repository to address a critical infrastructure issue affecting AWS VPC endpoint DNS behavior in ParallelCluster environments. Focused on operational reliability, the developer reverted the private_dns_enabled setting to false for VPC endpoints across CloudFormation, EC2, EFS, and SSM, correcting a misconfiguration from a previous change. This adjustment restored stable DNS resolution during Terraform-driven deployments, reducing the risk of connectivity issues in automated workflows. The work was implemented using AWS and Terraform, with configuration changes made in HCL. All modifications were carefully documented in the commit history to ensure traceability and maintain operational hygiene.