T M Indra Mahlia is an Australian engineer and a Highly Cited Researcher in the field of Engineering. Currently serving as a Distinguished Professor at the School of Civil and Environmental Engineering, University of Technology Sydney (UTS). He is a key core member of the University's prestigious Centre for Water and Wastewater Technology (CTWW).

Professor Mahlia's research interests span a wide range of areas, including Techno-Economic Analysis, Life-Cycle Assessment, Life-Cycle Cost, Cost-Benefit Analysis, Water-Energy Nexus, and Energy & Fuels. His dedication to advancing knowledge in these domains has secured over $6 million in funding for numerous projects supported by government and industrial organisations.

Recognised for his exceptional scholarly achievements, Professor Mahlia has consistently been named a Highly Cited Researcher in Engineering by Clarivate Analytics from 2017 to 2022. Furthermore, The Australian acknowledged his leadership in Sustainable Energy (Engineering & Computer Science) in a special report published in 2019 and 2025.

Since assuming his role as a Distinguished Professor at UTS in 2018, Professor Mahlia has exhibited a keen interest in mentoring early-career researchers. His guidance and support have been instrumental in fostering the success of his students and fellows.

With his research accomplishments and dedication to nurturing the next generation of scholars, Professor T M Indra Mahlia continues to inspire and shape the field of Engineering, leaving an indelible impact on sustainable energy and environmental engineering.

Professor Mahlia is a polyglot who is fluent in and can peer review in English, Indonesian, Malay, and Achinese.