WorkVenture gives you an inside look at what it's like to work at Umago Thai Steel (1999) Co., Ltd., office & team photos, reviews and more. This is the Umago Thai Steel (1999) Co., Ltd. Company Page. All content is posted anonymously by employees currently or previously working at Umago Thai Steel (1999) Co., Ltd..Apply to NokScootApply to AllPropertyApply to Siam and AsiaApply to WorkVenture Technologies