David Callahan Discusses Energy in PA 2022 by Shale Gas News published on 2022-07-06T15:05:27Z David Callahan is president of the Marcellus Shale Coalition (MSC), a leading trade association focused on unconventional shale development from the Marcellus and Utica plays. A native Pennsylvanian, Mr. Callahan leads the organization, founded in 2008, representing members engaged in all aspects of natural gas development, including exploration and production, midstream gathering, processing and transportation, as well as the suppliers and contractors who work with the industry. Genre News & Politics