Usman is currently working as a Water Resource Modeler/Hydrologist at Murray Darling Basin Authority/eWater Australia. Previously, he worked with the Water and Power Development Authority (WAPDA), Pakistan, and National Engineering Services of Pakistan (NESPAK) for almost 8 years on World Bank and Asian Development Bank-funded projects like the Dasu Dam Project, Sindh Water Sector Improvement Project, and Water Sector Capacity Building of Indus Basin.