| City of Dayton | — | Sep-Dec18 |
| County Commissioners' Association of Ohio | — | Sep-Dec17 |
| Adam Schwiebert | County Commissioners' Association of Ohio | — | Sep-Dec18 |
| Bradford L Cole | County Commissioners' Association of Ohio | — | Sep-Dec17 |
| Cheryl L Subler | County Commissioners' Association of Ohio | — | Sep-Dec17 |
| Kate Neithammer | County Commissioners' Association of Ohio | — | Jan-Apr18 |
| Department of Agriculture | — | Sep-Dec17 |
| David Daniels | Department of Agriculture | — | Sep-Dec17 |
| George McNab | Department of Agriculture | — | Sep-Dec17 |
| Janelle Mead | Department of Agriculture | — | Sep-Dec17 |
| Jared Parko | Department of Agriculture | — | May-Aug18 |
| John M Schlichter | Department of Agriculture | — | Sep-Dec17 |
| Tim Derickson | Department of Agriculture | — | Sep-Dec17 |
| Belinda M Jones | Franklin Soil and Water Conservation District | — | Jan-Apr18 |
| Governor's Office | — | Sep-Dec17 |
| Beth Hansen | Governor's Office | — | Sep-Dec17 |
| Dawn Larzelere | Governor's Office | — | Sep-Dec17 |
| Tim Biggam | Governor's Office | — | Sep-Dec17 |
| Wayne Struble | Governor's Office | — | Sep-Dec17 |
| Milliron Industries | — | Sep-Dec17 |
| Amanda Grandjean | Milliron Industries | — | Sep-Dec17 |
| Christopher N Slagle | Milliron Industries | — | Sep-Dec17 |
| Gregory J Lestini | Milliron Industries | — | Sep-Dec17 |
| Matt Koppitch | Milliron Industries | — | Sep-Dec17 |
| National Waste & Recycling Association | — | Sep-Dec17 |
| Willa J Ebersole | National Waste & Recycling Association | — | Sep-Dec17 |
| Ohio Chamber of Commerce | — | Sep-Dec17 |
| Zachary Frymier | Ohio Chamber of Commerce | — | Sep-Dec17 |
| Ohio Chemistry Technology Council | — | Jan-Apr18 |
| Bryan Bennett | Ohio Chemistry Technology Council | — | Jan-Apr18 |
| Jennifer Klein | Ohio Chemistry Technology Council | — | Jan-Apr18 |
| Shawn Nelson | Ohio Chemistry Technology Council | — | Jan-Apr18 |
| Ohio Environmental Protection Agency | — | Sep-Dec17 |
| Craig Butler | Ohio Environmental Protection Agency | — | Sep-Dec17 |
| Danielle Giannantonio | Ohio Environmental Protection Agency | — | Sep-Dec17 |
| Laura H. Factor | Ohio Environmental Protection Agency | — | Sep-Dec17 |
| Michael Guastella | Ohio Environmental Protection Agency | — | Jan-Apr18 |
| Ohio Manufacturers' Association | — | Jan-Apr18 |
| Robert Brundrett | Ohio Manufacturers' Association | — | Jan-Apr18 |
| Ryan R Augsburger | Ohio Manufacturers' Association | — | May-Aug18 |
| Ohio Municipal League | — | Sep-Dec17 |
| Ashley Ringle | Ohio Municipal League | — | Sep-Dec18 |
| Brad Barger | Ohio Municipal League | — | Sep-Dec18 |
| Brian P Barger | Ohio Municipal League | — | Sep-Dec18 |
| Edward L Albright | Ohio Municipal League | — | Sep-Dec17 |
| Thomas P Pappas | Purdue Pharma LP | — | Sep-Dec17 |
| Willa J Ebersole | Purdue Pharma LP | — | Sep-Dec17 |
| Rumpke Consolidated Companies | — | Sep-Dec17 |
| Joshua Sanders | Rumpke Consolidated Companies | — | Sep-Dec17 |
| Leah Pappas Porner | Rumpke Consolidated Companies | — | Sep-Dec17 |
| Solid Waste Authority of Central Ohio | — | Sep-Dec17 |
| Belinda M Jones | Solid Waste Authority of Central Ohio | — | Jan-Apr18 |
| Dan Jones | Solid Waste Authority of Central Ohio | — | Sep-Dec17 |
| William L Byers, IV | Solid Waste Authority of Central Ohio | — | Sep-Dec17 |
| Amy Goyal | The Ohio State University | — | May-Aug18 |
| Waste Management of Ohio, Inc. | — | Jan-Apr18 |
| Kathryn A Trent | Waste Management of Ohio, Inc. | — | Jan-Apr18 |
| McKenzie K Davis | Waste Management of Ohio, Inc. | — | Jan-Apr18 |
| Richard A Ayish | Waste Management of Ohio, Inc. | — | Jan-Apr18 |
| Shawn Nelson | Waste-Away Systems, LLC | — | Jan-Apr18 |