This workshop is organised for the 5th time in response to the favourable feedback in 2019, and is also developed as a follow0up to our popular Workshop on Geology of Singapore. It aims to provide a link between the knowledge of geology and its engineering applications in underground construction and rock cavern space development. It will present and discuss systematically the fundamentals of engineering geology and best practices both internationally and within the context of Singapore. It will cover the engineering uses of both soil and rocks, the theory and practice in site investigations for underground construction, rock mass classification methods for rock cavern design, and the basic concept and practical aspects of managing geological risks. The workshop is suitable for both engineers with little prior training in engineering geology and experienced engineers who want an update and a refresher course. It will be taught by Dr Zhou Yingxin and Dr Kar Winn, two highly regarded and very experienced specialists.