Musthofa Sidiq has experience in quality assurance and quality control across multiple companies. As a Quality Assurance Quality Control Supervisor at Hybrid Apparel, Musthofa oversees quality processes. At PT Goodguy's Indonesia, Musthofa holds the position of QAM, contributing to quality assurance management. Previously, as a QA Inspector at Li & Fung Limited, Musthofa was responsible for ensuring product quality standards were met.