This case study focused on Gunung Raja Paksi (GRP), a steel manufacturing company in Indonesia, with a portfolio in steel trading, cement plants and carbon markets. The case study covered the COVID-19 crisis period, especially the year 2020, which disrupted the normal operations of businesses and subjected the community to economic challenges. The emergence of GRP’s prominence in sustainable business attributed to the initiatives advanced by Kimin Tanoto, the chief executive officer (CEO) and chairperson of the Indonesia Iron and Steel Association (IISIA). Kimin Tanoto assumed leadership of GRP, a family-owned business, in 2018, despite being the second son. At the time of Kimin’s induction into the board of commissioners, two main challenges – the impacts of the COVID-19 pandemic, which disrupted the supply chains, and the company culture that resisted sustainable business approaches – acted as detriments to profit-making. Sustainable efforts, however, contributed to noticeable success during and after the COVID-19 crisis.