This in‑depth GCP auditor interview with Retha Britz, Senior GCP Auditor & Ethics Expert at THE QARP, explores real‑world GCP/GCLP audits in clinical trials, from investigator site inspections and informed consent review to remote audits, patient safety, and data integrity. Retha shares practical lessons for CRAs, QA professionals, trial managers, and aspiring GCP auditors who want to understand how high‑quality audits are conducted and how to grow into the Certified GCP Auditor role through structured training in the GCP Auditor School.