Indonesian citizen who was born in Palembang, August 18, 1974, Sumadi earned his Management Degree at Universitas Diponegoro in 2000 and continued achieved his Master in Financial Management at Binus Business School in 2023.

During his career at WIKA, Sumadi has a lot of portfolios in building sector, Sumadi's serves as President Commissioner of PT Wijaya Karya Bangunan Gedung Tbk (2022-Present), Senior Vice President Finance Division of PT Wijaya Karya (Persero) Tbk (2022-Present), and General Manager of Accounting & Tax of PT Wijaya Karya (Persero) Tbk (2020-2022). Currently, through the 2024 Annual General Meeting of Shareholders (AGMS), he is mandate as Director Risk Management and Legal.