SIET Company Limited (SIET) is a privately owned energy, environment, and social development consultancy with core businesses in technology development, engineering design and implementation, and sustainability management. Our clientele includes multinational companies, international financial institutes (IFIs) and governments throughout China and across Asia.

Internationally, SIET is a member company of Inogen Alliance®, a global corporation of consultants that provides global coverage through one point of contact for environmental, health, safety, and sustainability solutions for multinational organizations. With Inogen Alliance, SIET is part of a global network of over 5,000 consultants in 200 office locations.