Sahiholnasab brothers graduated from the University of Maryland in 1992, started their professional cooperation in the United States Each of the brothers has played a specific role in the process of design and construction based on his expertise and educational background. They have experience in designing, supervising, and implementing about 60 projects including residential and commercial buildings, offices, and also in the hospitality industry in the states of Maryland, Virginia, Washington DC, New York, Florida New Jersey, Nevada, and the city of London in the United Kingdom, and Peace in Hungary. Resuming their professional activity in Iran, since 1992, they have designed, supervised, managed, and implemented about 500 construction projects in the functions of residential towers, villas, offices, and commercial buildings