Alexander Marston developed AWS KMS key decryption support for S3 within the coralogix/terraform-coralogix-aws repository, enabling customer-managed CMK workflows for the Coralogix AWS Shipper. He introduced a configurable KMS ARN variable and updated the IAM policy to grant precise decryption permissions, ensuring secure and compliant access to S3 data. His work included comprehensive updates to the module’s documentation, changelog, and usage examples, improving onboarding and clarity for users. Using Terraform and HCL, Alexander focused on robust policy design and infrastructure-as-code best practices. The feature addressed a clear security need, demonstrating depth in AWS, IAM, and KMS integration.