WorkVenture gives you an inside look at what it's like to work at GREAT DIAM Co., Ltd., office & team photos, reviews and more. This is the GREAT DIAM Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at GREAT DIAM Co., Ltd..Apply to bec teroApply to big cameraApply to Ruam Kong ProetApply to Siam Wellness