He has been a course coordinator for IGHR (Land Platting) and a faculty member for other courses at IGHR, SLIG, and the Historical Society of Pennsylvania’s Researching Family in Pennsylvania. He is the author of a number of books and journal articles. He researches extensively on projects requiring in-depth knowledge of proprietor and commonwealth land records, mapping, and land placement. Regular research venues include the Pennsylvania Archives, State Library of Pennsylvania, Pennsylvania State Law Library, Historical Society of Pennsylvania, military repositories (including David Library of the American Revolution and US Army Military History Institute), National Archives, religious & denominational repositories, county courthouses, and county and local historical and genealogical societies. Southern Pennsylvania border county research includes frequent on-site research at repositories in Annapolis, Baltimore, Maryland counties, West Virginia, and Virginia.