Johnstown's history was shaped by immigrants, and Jesper Nielsen, originally from Denmark, has shown the impact an individual can have with a supportive community around him. Nielsen and his wife, Amy Croyle, opened Croyle-Nielsen Therapeutic Associates, 303 Budfield St. in Richland Township 10 years ago, and in a move completely unrelated to his own work, Nielsen has bridged Denmark to Johnstown in the defense industry.