| 2025 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director Vice President | 0 | $0 | $0 | View return |
| 2024 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2024 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director Vice President | 0 | $0 | $0 | View return |
| 2023 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2023 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director Vice President | 0 | $0 | $0 | View return |
| 2023 | The National Center for Frontier Communities | 990 | Secretary | 8 | $0 | $0 | View return |
| 2023 | The National Center for Frontier Communities | 990 | Secretary | 3 | $0 | $0 | View return |
| 2022 | The National Center for Frontier Communities | 990 | Secretary | 8 | $0 | $0 | View return |
| 2022 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director Vice President | 0 | $0 | $0 | View return |
| 2022 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2022 | The National Center for Frontier Communities | 990 | Secretary | 3 | $0 | $0 | View return |
| 2021 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2021 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director Vice President | 0 | $0 | $0 | View return |
| 2021 | The National Center for Frontier Communities | 990 | Secretary | 0.15 | $0 | $0 | View return |
| 2020 | Fritz & Emily Darmstadter Foundation Inc. | 990PF | Director/Vice President | 0 | $0 | $0 | View return |
| 2020 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2020 | The National Center for Frontier Communities | 990 | Secretary | 0.15 | $0 | $0 | View return |
| 2019 | The National Center for Frontier Communities | 990 | Secretary | 1.5 | $0 | $0 | View return |
| 2019 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2018 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2018 | The National Center for Frontier Communities | 990 | Secretary | 1.5 | $0 | $0 | View return |
| 2017 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2017 | The National Center for Frontier Communities | 990 | Secretary | 1.5 | $0 | $0 | View return |
| 2016 | The National Center for Frontier Communities | 990 | Secretary | 2 | $0 | $0 | View return |
| 2016 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2015 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2015 | The National Center for Frontier Communities | 990 | Secretary | 1.5 | $0 | $0 | View return |
| 2014 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2014 | The National Center for Frontier Communities | 990 | Secretary | 1 | - | - | View return |
| 2013 | The American Geographical Society of New York | 990 | VP/Councilor | 1 | $0 | $0 | View return |
| 2013 | The National Center for Frontier Communities | 990 | Secretary | 1 | $0 | $0 | View return |
| 2013 | Green Belt Conservancy Inc. | 990 | Board Member | 0.5 | $0 | $0 | View return |