Sivan Design Group  Sivan Design Group, also known as C1 Design Group, is an Iranian car design firm and full-service product development company in Tehran, Iran. Founded in 2006 by Alireza Mohammadzadeh & Mohammad Hossein Amini Yekta. SIVAN Group has grown from a two-person design and engineering company to a full-service product development firm, able to meet the demands of any project. Sivan group have diverse and specialized backgrounds in design, engineering, modeling, rapid prototyping, fabrication and manufacturing. Sivan Design Group has been credited for the design of a wide variety of concept as well as production cars since the firm's founding in 2006 such as:  Notable car designs   Sivan design group has been held design contest in automotive filed every 2 Year. First contest held from 24 April to 24 September 2009 and the first collective concept car design exhibition titled "From Dream to Reality" took place from 18 to 23 April 2009 at the Kamal Aldin Behzad Gallery in Teheran, Iran.