A QA/QC Supervisor oversees quality assurance and control processes to ensure products or construction projects meet company, client, and industry standards (e.g., ISO 9001). They lead inspections, manage testing (e.g., NDT), implement QA plans, and, according to Petrojobs, Scribd, and Huneety, handle NCRs (non-conformance reports), and supervise inspectors to ensure compliance with technical specifications and project requirements.