Hydropower Research & Development Centre
- Caters the specialized services to (other than DGPC Plants & Subsidiary/JV companies)
- Bhutan Power Corporation Ltd.
- Punatsangchhu-I&II Hydroelectric Project Authority
- Mangdechhu Hydroelectric Project Authority
- Kholongchhu Hydroelectric Project Limited
- Bhutan Ferro Alloys Ltd.
- Bhutan Board Product Ltd.
- Dungsam Cement Corporation Ltd.
- Bhutan Carbide & Chemicals Ltd.
- Bhutan Ferro Industries Ltd.
- Saint-Gobain Ceramic Materials Bhutan Pvt. Ltd.
- Penden Cement Authority Ltd.
- Druk Wang Alloys Ltd.
- Druk Ferro Alloys Ltd.