| 2024 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $267,043 | $0 | View return |
| 2024 | Lutheran Social Ministries of Maryland Inc. | 990 | Assistant VP Construction And Facilities Manageme | 40 | $160,112 | $0 | View return |
| 2024 | National Ground Water Research and Educational Foundation | 990 | CEO | 5 | $0 | $266,723 | View return |
| 2024 | Pine Plains Cemetery Association | 990 | Trustee | 2 | $0 | $0 | View return |
| 2024 | Panhandle Wildlife Rescue Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2023 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $235,337 | $0 | View return |
| 2023 | Lutheran Social Ministries of Maryland Inc. | 990 | Corp Director Of Facilities | 40 | $151,572 | $0 | View return |
| 2023 | National Ground Water Research and Educational Foundation | 990 | Ngwa CEO | 5 | $0 | $235,337 | View return |
| 2023 | Pine Plains Cemetery Association | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $233,671 | $0 | View return |
| 2022 | Lutheran Social Ministries of Maryland Inc. | 990 | Corp Director Of Facilities | 40 | $129,416 | $0 | View return |
| 2022 | American Postal Workers Union 692 Champaign Area Local | 990EZ | Steward | 4 | $267 | $0 | View return |
| 2022 | National Ground Water Research and Educational Foundation | 990 | Ex Officio & Ngwa CEO | 3 | $0 | $233,671 | View return |
| 2022 | Water Well Trust Inc Margaret Martens | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Kansas Ground Water Association | 990EZ | Staff | 2 | $0 | $0 | View return |
| 2022 | Pine Plains Cemetery Association | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | Pet Project Foundation Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2021 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $179,767 | $0 | View return |
| 2021 | American Postal Workers Union 692 Champaign Area Local | 990EZ | Steward | 4 | $1,055 | $0 | View return |
| 2021 | National Ground Water Research and Educational Foundation | 990 | Chief Executive Officer | 5 | $0 | $179,767 | View return |
| 2021 | Water Well Trust Inc Margaret Martens | 990 | Director | 0.5 | $0 | $0 | View return |
| 2021 | Pine Plains Cemetery Association | 990 | Trustee | 2 | $0 | $0 | View return |
| 2020 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $197,234 | $0 | View return |
| 2020 | American Postal Workers Union 692 Champaign Area Local | 990EZ | Steward | 4 | $1,787 | $0 | View return |
| 2020 | National Ground Water Research and Educational Foundation | 990 | Chief Executive Officer | 5 | $0 | $197,234 | View return |
| 2020 | Pine Plains Cemetery Association | 990 | Trustee | 2 | $0 | $0 | View return |
| 2020 | Water Well Trust Inc Margaret Martens | 990 | Director | 0 | $0 | $0 | View return |
| 2019 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $161,583 | $0 | View return |
| 2019 | American Postal Workers Union 692 Champaign Area Local | 990EZ | Steward | 4 | $2,136 | $0 | View return |
| 2019 | National Ground Water Research and Educational Foundation | 990 | Chief Executive Officer | 5 | $0 | $161,583 | View return |
| 2018 | National Ground Water Association Inc | 990 | Chief Executive Officer | 40 | $139,627 | $0 | View return |
| 2018 | National Ground Water Research and Educational Foundation | 990 | Chief Executive Officer | 5 | $139,627 | $0 | View return |
| 2018 | Moab Area Community Land Trust | 990 | Board Member | 2 | $0 | $0 | View return |
| 2017 | National Ground Water Association Inc | 990 | CEO Starting In Dec. 2017 | 40 | $21,970 | $0 | View return |
| 2017 | National Ground Water Research and Educational Foundation | 990 | CEO Starting In Dec. 2017 | 5 | $0 | $21,970 | View return |
| 2017 | Foundation for Affordable Drinking Water | 990 | CEO Starting Dec. 2017 | 1 | $0 | $0 | View return |
| 2015 | Oklahoma State Chamber of Commerce and Industry Inc DBA the State Chamber | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Oklahoma State Chamber of Commerce and Industry Inc DBA the State Chamber | 990 | Board Member | 1 | $0 | $0 | View return |