| 2024 | Rappahannock Pistol & Rifle Club | 990 | Range Operat | 5 | $0 | $0 | View return |
| 2024 | Feeding Hungry Hearts Foundation | 990EZ | Director | 0.2 | $0 | $0 | View return |
| 2024 | Warren Capital Foundation Inc. | 990PF | Manager | 2 | $0 | $0 | View return |
| 2023 | Warren Capital Foundation Inc. | 990PF | Manager | 2 | $0 | $0 | View return |
| 2023 | Person County Partnership for Children Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2023 | Rappahannock Pistol & Rifle Club | 990 | Range Operat | 5 | $0 | $0 | View return |
| 2023 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman | - | $0 | $0 | View return |
| 2023 | University Program Council University of Nebraska - Lincoln | 990 | President Thru 12/23 | 10 | $0 | $0 | View return |
| 2023 | Connect Israel | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | $0 | View return |
| 2022 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman | 1 | $0 | $0 | View return |
| 2021 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman | 1 | $0 | $0 | View return |
| 2021 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | $0 | View return |
| 2020 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | $0 | View return |
| 2020 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman | 1 | $0 | $0 | View return |
| 2019 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | $0 | View return |
| 2019 | The Noroton Fire Department Incorporated | 990 | Executive Comm. | 1 | $0 | $0 | View return |
| 2018 | The Noroton Fire Department Incorporated | 990 | Executive Comm. | 1 | $0 | $0 | View return |
| 2018 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2018 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board As Needed | 0 | $0 | $0 | View return |
| 2017 | Wichita Area Builders Association | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board As Needed | 0 | $0 | $0 | View return |
| 2017 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2017 | The Noroton Fire Department Incorporated | 990 | Executive Comm. | 1 | $0 | $0 | View return |
| 2016 | International Union of Painters & Allied Trades Local 391 | 990EZ | Treasurer | 10 | $1,200 | $0 | View return |
| 2016 | Wichita Area Builders Association | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board As Needed | 0 | $0 | $0 | View return |
| 2016 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2016 | Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Oklahoma Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Northern Neck Orchestra Corporation | 990EZ | Executive Vice President | 0.25 | $0 | $0 | View return |
| 2016 | The Noroton Fire Department Incorporated | 990 | Executive Comm. | 1 | $0 | $0 | View return |
| 2016 | The Musical Theater Project Inc | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2015 | International Union of Painters & Allied Trades Local 391 | 990EZ | Treasurer | 10 | $1,275 | $0 | View return |
| 2015 | Wichita Area Builders Association | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2015 | The Noroton Fire Department Incorporated | 990 | Executive Comm. | 1 | $0 | $0 | View return |
| 2015 | Oklahoma Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Allegheny River Towns Enterprise Zone Inc | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2015 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board - As Needed | - | $0 | $0 | View return |
| 2015 | Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The Musical Theater Project Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Kiwanis Club of East Hampton Foundation Inc. | 990EZ | Secretary | 0 | $0 | $0 | View return |
| 2014 | International Union of Painters & Allied Trades Local 391 | 990EZ | Treasurer | 10 | $480 | $0 | View return |
| 2014 | Wichita Area Builders Association | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Oklahoma Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Allegheny River Towns Enterprise Zone Inc | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2014 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2014 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board - As Needed | 0 | $0 | $0 | View return |
| 2014 | The Musical Theater Project Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Kiwanis Club of East Hampton Foundation Inc. | 990EZ | Secretary | 0 | $0 | $0 | View return |
| 2013 | International Union of Painters & Allied Trades Local 391 | 990EZ | Treasurer | 10 | $406 | $0 | View return |
| 2013 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2013 | Greene County Historical Society Inc C/O David C Dorpfeld | 990 | Chairman / Board - As Needed | - | - | - | View return |
| 2013 | Oklahoma Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Independent Petroleum Association | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Kiwanis Club of East Hampton Foundation Inc. | 990EZ | Secretary | 0 | $0 | $0 | View return |
| 2012 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |
| 2011 | Warren Capital Foundation Inc. | 990PF | Manager | 0 | $0 | - | View return |