Tiar has over twelve years of experience in supply chain and pharmaceuticals. In 2009 he became a Senior Technical Officer for Drug Management and TB Health Information Systems at Challenge TB Project, where he was responsible for giving technical assistance to the National TB program. He has assisted the NTP on the development of procurements and supply chain management for both the Global Fund and WHO Stop TB Partnership
He supported the successful supply transition from conventional MDR treatment to shorter treatment regimen without any stock out and minimized loss from expired drugs in 2017-2018. He has worked to successfully implement an e-TB manager software pilot that is currently in use in 24 provinces and more than 180 sites.