Viwat is currently General Manager of Siam Glass Industry Co.,Ltd. He experienced approx. 25 yrs in Thailand glass industry which include, flat glass, tableware, glass block and container glass. He also taking current role as Chairman of Glass Manufacturing Federation of Thai Industry (GMFTI) and AFGM Chairman (2017-2018).
As General Manager of Siam Glass Industry Co.,Ltd (An affiliate of Osotspa Co.,Ltd – largest energy drink company in Thailand) he responsible for 4 glass container plants operation, 7 furnaces 19 production lines and 2 cullet treatment plants).