Datuk Chiw started his career with Malacca Guan Seng Sdn Bhd as a storekeeper in 1975 to 1986. Later on, he was promoted as salesman in 1986 and as sales executive in 1991, subsequenly as Executive Director in 1996 till 2001. In 2002 to 2008, he joined Guan Seng Oil and Gas Sdn Bhd as Executive Director. In 2008 to 2018, he was attached to Harta Oil & Gas Equipment Sdn Bhd as Chief Executive Officer. In 2018, he was appointed as Chairman of Harta Engineering Sdn Bhd.