Ir. Dr. Wai-Lok Wallace LAI specializes in research, teaching, and consultancy of nondestructive evaluation on underground utility and engineering structures. He is currently an Assistant Professor, and the program leader of BSc (Hons) Geomatics, in-charge of the underground utility survey lab in the Department of Land Surveying and Geo-Informatics in The Hong Kong Polytechnic University. Ir. Dr. LAI was a postdoc in Federal Institute of Materials Research and Testing (BAM) in Berlin, Germany. Since 2010, he has been serving as a guest scientist in BAM. He is also a technical assessor listed under the Hong Kong Laboratory Accreditation Scheme (HOKLAS), Innovation Technology Commission of the HKSAR Government.