This document summarizes an approach to implementing dynamic data masking (DDM) policies on a Snowflake cloud data warehouse using the data build tool (DBT). It describes creating DDM policies in Snowflake to selectively mask plain text data at query time, writing a DBT post-hook macro to apply policies to models, and configuring individual DBT models and the dbt_project file to apply policies. The approach aims to securely share data outside the organization while maintaining privacy through reversible and irreversible masking techniques applied dynamically at query time.