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About the Author: Zenaida de Guzman has substantive years of experience in the specialised field of procurement, and specifically in the aerospace industry, handling sub-contracting of materials for services. She holds a Certificate in Purchasing Management. Zenaida de Guzman is a member of the Singapore Institute of Purchasing and Materials Management (SIPMM). She completed Diploma in Procurement and Supply Management (DPSM) on September 2020 at SIPMM Institute.