In the last two decades, implementation of projects in the form of EPC has been considered seriously in various fields. Tunnel Sadd Ariana has surely been one of the pioneers in using EPC in multidisciplinary executive parts of Iran and in Middle Asia, with the benefit of capabilities such as: having different engineering department to deal with works, Possessing subsidiary companies with different specialties, Having partner companies with expertise in procuring and constructing in different fields of work, Joint ventures with well-known foreign companies, high-tech and optimal facilities, and the expertise in implementing projects in the EPC form. The company could play an effective role in encouraging and performing projects in EPC form, as providing services to its clients.