Power BI consultants implement data governance by defining user roles and permissions through Row-Level Security (RLS). They classify data sensitivity using labels and enable auditing to track access and modifications. Power BI consultant collaborate with IT teams to create governance frameworks that align with organizational policies. They use Power BI Premium for centralized administration and dataflows for consistent data preprocessing. Regular training sessions ensure users understand governance protocols. By employing these methods, consultants create a secure and compliant data environment that promotes trust and accountability.