 In 1991, during the collapse of the Soviet Union, he visited the newly formed Republic of Armenia and served as a legal advisor there and authored the first draft of the Armenian Constitution.During the same year, Yeghiayan pioneered efforts to bring food assistance to the newly formed republic through USAID, and he led a team of engineers from the Ministry of Engineering in California to conduct a feasibility study of the oil industry in Armenia.Yeghiayan had formed a law firm, Yeghiayan & Associates, with his spouse, attorney Rita Mahdessian, in Glendale, California.