Chi Nhanh Cong Ty Co Phan Ky Thuat Sigma Address: No 29B, D9 Street, Tay Thanh Ward, Tan Phu District, Ho Chi Minh City Enterprise code: 0101600518-002 Phone: 02439288683 Representative: Nguyen Quang Ngoc Tay Thanh Ward, Tan Phu District, Ho Chi Minh CityFounding date: 21 - 7 - 2022