Michael A. Twohig is a Subject Matter Expert in the field of Subsurface Utility Mapping (SUM). Michael has more than 37 years of industry experience across the US, Australia, India, and Europe with a focus on the integration of traditional utility locating procedures with land survey best practices. As head of SUM at DGT, Michael spearheads the firm’s subsurface utility locating, 3D utility mapping and subsurface utility damage prevention programs. Michael is currently developing Multi-Sensor Mobile Mapping platforms using the next generation of multi-channel, multi-frequency Ground Penetrating Radar (GPR) systems for the SUM and void detection industry. In the span of his career, Michael has authored more than 40 articles relating to utility mapping, underground damage prevention, and utility industry best practices, and he is a frequent speaker at international conferences such as the Common Ground Alliance CGA, SPAR, Hexagon and the international Lidar conference ILMF and most recently GEOBIM in Amsterdam. Michael has also presented SUM best practices at military, transportation, commercial and GITA conferences. One of Michael’s greatest achievements is the advancement and development and implementation of new 3D deliverables for geospatial projects, integrating LiDAR, utility locating systems, GPR, infrared, land surveying, and multi-sensor platforms to provide high quality, reliable and accurate data for CAD, GIS and BIM delivery format.