Upon graduation, David has been involved with the Development of Putrajaya while engaging design with Hijjas Kasturi Associates (HKA), an International Architectural Firm by its standard. Later, he moves to smaller establishment to hone his skill in traditional “bread and butter” practices, owing to the needs for him to pass the Practical Professional Experience Examination, commonly known as Part 3 of the Board of Architect Malaysia Professional Examination. Having completed multiple mass housing projects, he is promoted to be Senior Project Architect, overlooking several luxury high rises in the Klang Valley and by then he is attached to another mid size Architectural and Town Planning firm in style of Garis Architect Sdn Bhd. It is this untiring labor that has earned him the recognition as a full-fledged Professional Architect from the Board of Architect Malaysia, in a single sitting, enabling him to be the submitting and qualifies person for Building Submissions within Malaysia. He is elected as a corporate member to the Institute of Architects (PAM) and Interior Design Malaysia (IPDM).
As his continue effort to contribute back to the society, Ar. David has been involved in the academia as guest lecturer cum critique for the various institution of higher learning domestically such as University Technology of Malaysia (UTM), University Tengku Abdul Rahman (UTAR), UCSI and Taylor’s University leading their design studios such as Dekon04 and Discourse in Studio Sem06. As a result of this experimentation, Ar. David delivered his maiden conference paper in architectural education in the PAM International Education Seminar 2018 (PIES 2018).