| 2024 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2024 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 10 | $0 | $0 | View return |
| 2023 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 10 | $0 | $0 | View return |
| 2023 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2022 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2022 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 10 | $0 | $0 | View return |
| 2021 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2021 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 15 | $0 | $0 | View return |
| 2020 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2020 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 7 | $0 | $0 | View return |
| 2019 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 5 | $0 | $0 | View return |
| 2019 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2018 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2018 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 4 | $0 | $0 | View return |
| 2017 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2016 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2016 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 4 | $0 | $0 | View return |
| 2015 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2015 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 3 | $0 | $0 | View return |
| 2014 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2014 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 5 | $0 | $0 | View return |
| 2013 | Steam Locomotive Heritage Association Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2013 | Twin Cities Regional Science Fairs | 990EZ | Board Member & Scientific Review Committee Chair | 7 | $0 | $0 | View return |
