TSCE has a foreign associate i.e., NESPAK, National Engineering Services of Pakistan (Pvt) Ltd. who, collaborates in specialized area as and when required. TSCE participates with various organizations at the national and international levels, government, public, and private, institutions and associations that are considered to be instrumental in enhancing as:
• World Bank Islamic Development Bank (IDB)
• Iranian National Committee on Large Dams (IRCOLD)
• Iranian Association of Water and Wastewater Experts
• Iranian Hydraulic Association (IRCE)
• Iranian Society of Consulting Engineers