| Kevin R Schmidt | American Chemistry Council | — | May-Aug15 |
| American Concrete Pipe Association | — | May-Aug15 |
| Luther L Liggett, Jr. | American Concrete Pipe Association | — | May-Aug15 |
| American Council of Engineering Companies of Ohio | — | May-Aug15 |
| Kevin L Futryk | American Council of Engineering Companies of Ohio | — | Jan-Apr16 |
| Michael P Morrison | American Council of Engineering Companies of Ohio | — | Jan-Apr16 |
| Aqua Ohio, Inc | — | May-Aug15 |
| Denise M Larr | Aqua Ohio, Inc | — | May-Aug15 |
| William Fitzgibbon | Aqua Ohio, Inc | — | May-Aug15 |
| ArcelorMittal USA LLC | — | May-Aug15 |
| Michael W LaWell | ArcelorMittal USA LLC | — | May-Aug15 |
| Association of Ohio Metropolitan Wastewater Agencies | — | Sep-Dec15 |
| Andrew Etter | Association of Ohio Metropolitan Wastewater Agencies | — | Sep-Dec15 |
| Nathanael Jonhenry | Association of Ohio Metropolitan Wastewater Agencies | — | Jan-Apr16 |
| Timothy J Cosgrove | Association of Ohio Metropolitan Wastewater Agencies | — | Jan-Apr16 |
| Avient Corporation | — | May-Aug15 |
| Gary E Smith, Jr. | Avient Corporation | — | May-Aug15 |
| Josh Rubin | Avient Corporation | — | May-Aug15 |
| City of Columbus | — | May-Aug16 |
| Cleveland Metropolitan Park District | — | Jan-Apr16 |
| Belinda M Jones | Cleveland Metropolitan Park District | — | Jan-Apr16 |
| Dan Jones | Cleveland Metropolitan Park District | — | Jan-Apr16 |
| Daniel Hurley | Cleveland Metropolitan Park District | — | Jan-Apr16 |
| Coalition of Ohio Regional Districts | — | May-Aug15 |
| Andrew Huffman | Coalition of Ohio Regional Districts | — | May-Aug15 |
| Brooke A Cheney | Coalition of Ohio Regional Districts | — | May-Aug15 |
| Kelly C O'Reilly | Coalition of Ohio Regional Districts | — | May-Aug15 |
| Matthew S Whitehead | Coalition of Ohio Regional Districts | — | May-Aug15 |
| Victor F Hipsley | Coalition of Ohio Regional Districts | — | May-Aug15 |
| Columbus Public Health | — | May-Aug16 |
| Kelli Hykes | Columbus Public Health | — | May-Aug16 |
| County Commissioners' Association of Ohio | — | May-Aug15 |
| Brian Mead | County Commissioners' Association of Ohio | — | Jan-Apr16 |
| Cheryl L Subler | County Commissioners' Association of Ohio | — | May-Aug15 |
| Suzanne K Dulaney | County Commissioners' Association of Ohio | — | Jan-Apr16 |
| County Engineers Association of Ohio | — | Sep-Dec15 |
| Michael T Evans | County Engineers Association of Ohio | — | Sep-Dec15 |
| Ductile Iron Pipe Research Association | — | Sep-Dec16 |
| Andrew Minton | Ductile Iron Pipe Research Association | — | Sep-Dec16 |
| Greg Bennett | Ductile Iron Pipe Research Association | — | Sep-Dec16 |
| William L Byers, IV | Ductile Iron Pipe Research Association | — | Sep-Dec16 |
| Governor's Office | — | May-Aug15 |
| Benjamin Kanzeg | Governor's Office | — | May-Aug15 |
| Beth Hansen | Governor's Office | — | May-Aug15 |
| Dawn Larzelere | Governor's Office | — | Jan-Apr16 |
| Elle Decot | Governor's Office | — | May-Aug15 |
| Eric Poklar | Governor's Office | — | May-Aug15 |
| Jai Chabria | Governor's Office | — | May-Aug15 |
| Kimberly Kutschbach | Governor's Office | — | May-Aug15 |
| Madison Whalen | Governor's Office | — | May-Aug15 |
| Megan Fitzmartin | Governor's Office | — | May-Aug15 |
| Michael Fraizer | Governor's Office | — | May-Aug15 |
| Sarah Huffman | Governor's Office | — | Sep-Dec15 |
| Scott Blake | Governor's Office | — | May-Aug15 |
| Wayne Struble | Governor's Office | — | May-Aug15 |
| Metallus Inc | — | May-Aug15 |
| Denise M Larr | Metallus Inc | — | May-Aug15 |
| William Fitzgibbon | Metallus Inc | — | May-Aug15 |
| National Association of Water Companies, Ohio Chapter | — | May-Aug15 |
| Denise M Larr | National Association of Water Companies, Ohio Chapter | — | May-Aug15 |
| William Fitzgibbon | National Association of Water Companies, Ohio Chapter | — | May-Aug15 |
| Northeast Ohio Regional Sewer District | — | Sep-Dec15 |
| Darnella Robertson | Northeast Ohio Regional Sewer District | — | Sep-Dec15 |
| Karen A Cincione | Northeast Ohio Regional Sewer District | — | Sep-Dec15 |
| Thomas Niehaus | Northeast Ohio Regional Sewer District | — | Sep-Dec15 |
| Nucor Steel Marion, Inc | — | May-Aug15 |
| Denise M Larr | Nucor Steel Marion, Inc | — | May-Aug15 |
| William Fitzgibbon | Nucor Steel Marion, Inc | — | May-Aug15 |
| Ohio Chemistry Technology Council | — | May-Aug15 |
| Jennifer Klein | Ohio Chemistry Technology Council | — | May-Aug15 |
| Kevin R Schmidt | Ohio Chemistry Technology Council | — | May-Aug15 |
| Ohio Department of Transportation | — | Sep-Dec15 |
| Bryan Bennett | Ohio Department of Transportation | — | Sep-Dec15 |
| Ohio Environmental Protection Agency | — | May-Aug15 |
| Craig Butler | Ohio Environmental Protection Agency | — | May-Aug15 |
| Danielle Giannantonio | Ohio Environmental Protection Agency | — | May-Aug15 |
| Greg Vergamini | Ohio Environmental Protection Agency | — | Jan-Apr16 |
| Laura H. Factor | Ohio Environmental Protection Agency | — | May-Aug15 |
| Tracy S Freeman | Ohio Environmental Protection Agency | — | May-Aug15 |
| Ohio Facilities Construction Commission | — | May-Aug15 |
| David Chovan | Ohio Facilities Construction Commission | — | May-Aug15 |
| David Williamson | Ohio Facilities Construction Commission | — | Sep-Dec15 |
| Jeffrey Westhoven | Ohio Facilities Construction Commission | — | May-Aug15 |
| Jon Walden | Ohio Facilities Construction Commission | — | Sep-Dec15 |
| Sarah Spence | Ohio Facilities Construction Commission | — | Sep-Dec15 |
| Ohio Home Builders Association, Inc | — | Jan-Apr16 |
| Kristen Sours | Ohio Home Builders Association, Inc | — | Jan-Apr16 |
| Vincent J Squillace | Ohio Home Builders Association, Inc | — | Jan-Apr16 |
| Ohio Manufacturers' Association | — | May-Aug15 |
| Robert Brundrett | Ohio Manufacturers' Association | — | May-Aug15 |
| Ryan R Augsburger | Ohio Manufacturers' Association | — | May-Aug15 |
| Ohio Municipal League | — | May-Aug15 |
| Edward L Albright | Ohio Municipal League | — | Jan-Apr16 |
| Joshua Brown | Ohio Municipal League | — | Jan-Apr16 |
| Kent M Scarrett | Ohio Municipal League | — | Jan-Apr16 |
| Ohio Rural Water Association | — | May-Aug15 |
| Andrew Huffman | Ohio Rural Water Association | — | May-Aug15 |
| Brooke A Cheney | Ohio Rural Water Association | — | May-Aug15 |
| Kelly C O'Reilly | Ohio Rural Water Association | — | May-Aug15 |
| Matthew S Whitehead | Ohio Rural Water Association | — | May-Aug15 |
| Victor F Hipsley | Ohio Rural Water Association | — | May-Aug15 |
| Ohio Society of Professional Engineers | — | May-Aug15 |
| Holly Flanigan | Ohio Society of Professional Engineers | — | May-Aug15 |
| Ohio Steel Council | — | May-Aug16 |
| Adam Hewit | Ohio Steel Council | — | Jan-Apr16 |
| Denise M Larr | Ohio Steel Council | — | May-Aug15 |
| United States Steel Corporation | — | Jan-Apr16 |
| Adam Hewit | United States Steel Corporation | — | Jan-Apr16 |
| Emily Petrovich | United States Steel Corporation | — | Jan-Apr16 |