Three senior partners from Sullivan & Worcester LLP, one of the top 200 law firms in the United States, pull up at the offices of The Currency near Fitzwilliam Square. Aidan Browne greeted me in a warm Irish accent still prevalent despite moving to Boston in 1986 after graduating from UCD.  Browne is a partner in the firm which also goes by the abbreviated name of Sullivan and where for decades he has helped Irish companies and banks to establish and build their businesses in the United States. He is a fellow of the Smurfit Graduate School of Business at UCD and…