Parsjooyab consulting Eng Co. Was founded in 1988 with the aim of providing consultancy services in fields of water and wastewater. Some of the most important grades of the company are: 1- Grade 1 in field of water and wastewater installations with 12 licensed works. 2- Grade 2 in field of water and wastewater installations with 10 licensed works. 3- Grade 2 in field of irrigation and drainage networks with 5 licensed works. Parsjooyab founded two subsidiary firms in Isfahan and Rasht with names of “Isfahan Parsjooyab Consulting EngCo.” and “Abfarmane-Shomal Eng Co.” at 2006 with cooperation of some of its experts and by benefiting from 20 years experience of the parent organization. These subsidiary firms have been rated by national planning and management organization as follows Isfahan Parsjooyab Consulting Eng Co.: 1- Grade 3 in field of water and wastewater installations. 2- Grade 2 in field of irrigation and drainage. 3- Grade 3 in field of technical inspection. Abfarmane-Shomal Eng Co.: 1- Grade 3 in field of water and wastewater installations. 2- Grade 3 in field of irrigation and drainage.