(Providing consultancy, supervision, design ... construction). To: Investors, Partners and Customers. First of all, DDA Technical Joint Stock Company (DDA-CONS) would like to send our best wishes to investors, partners and customers. Our motto is: "Prestige - Quality - Timely", DDACONS is looking forward to the partners to quality and success in construction projects. Founded in 2005 and has 12 years of experience in the field, with a team of experienced consultants.