Kantor Besar Lama PTBA (2025) is an administrative redevelopment project located in Tanjung Enim, South Sumatra, owned and managed by PT Bukit Asam Tbk. The team is involved as a Greenship Professional, supporting the building’s transition toward improved sustainability performance aligned with Indonesia’s green building standards. With the certification process currently ongoing, the project represents PTBA’s commitment to enhancing environmental efficiency, operational performance, and sustainable workplace design within its core facilities.