His academic areas of expertise are pastoral theology, history and theology of ministry, methods and models of theological reflection, ecclesiology, and Lasallian spirituality.
McGinniss serves on the Boards of the Association of Independent Colleges and Universities of Pennsylvania, American University of Rome, Manhattan College, Calvert Hall College (Baltimore, Maryland), the Greater Philadelphia Urban Affairs Coalition, the Greater Philadelphia Chamber of Commerce, and the Office of Community Development of the Archdiocese of Philadelphia.