RAYAB Consulting Engineers Company was founded in 1984. Taking advantage of hundreds of experienced experts’ cooperation , know – how and scientific experiences, the company has studied , designed and supervised, water and water transmission infrastructural projects, consulting and studying services for potable, agricultural and industrial water consumption, urban and industrial water distribution and wastewater collecting and disposal networks, water and wastewater treatment plants, environmental and health services and water resources conservation as large and small projects throughout Iran In addition to offices in Tehran, it has offices in Isfahan , Ghazvin, Takestan, Gorgan, Karaj, Ghom, Kashan, Delijan, Malayer , Ilaam , Ahwaz, Dezful, Babolsar, Bojnourd, Mashhad, Esfarayen, Kashmar, Birjand, Bandarabbas, Sirjan and Sare – Pole – Zahab