| 2024 | Leiden Conservation Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2023 | Leiden Conservation Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2022 | Leiden Conservation Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2021 | Leiden Conservation Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2020 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2019 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2018 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2018 | Giraffe Conservation Foundation USA | 990 | Treasurer | - | $0 | $0 | View return |
| 2017 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2017 | Giraffe Conservation Foundation USA | 990 | Treasurer | - | $0 | $0 | View return |
| 2016 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2016 | Giraffe Conservation Foundation USA | 990 | Treasurer | 0.5 | $0 | $0 | View return |
| 2015 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2014 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2013 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |
| 2012 | Leiden Conservation Foundation | 990PF | Director; Secretary/Treasu | 1 | $0 | $0 | View return |