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About the Author Wong Siew Ing has substantive experience in customer service and operations planning, specifically in the transport sector. Her current job requires active interaction with external vendors and contractors. She holds Diploma in Security Management, and SIPMM Executive Certificate in Supply Chain Management (ECSCM). Siew Ing is a member of the Singapore Institute of Purchasing and Materials Management (SIPMM), and she completed the Diploma in Procurement and Supply management (DPSM) on September 2019 at SIPMM Institute.