| 2022 | Cary Institute of Ecosystem Studies Inc | 990 | Board Of Trustees Through 11/22 | 1 | $0 | $0 | View return |
| 2021 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2020 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2019 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2018 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2018 | Wave Hill Incorporated | 990 | Director (Through 12/2018) | 2 | $0 | $0 | View return |
| 2018 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2017 | Catskill Mountainkeeper Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2017 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2017 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2017 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2016 | Catskill Mountainkeeper Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2016 | Open Space Institute Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Open Space Institute Land Trust Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2016 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | Catskill Mountainkeeper Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2015 | Open Space Institute Land Trust Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2015 | Hudson River Foundation for Science And | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | Open Space Institute Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2015 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2014 | Open Space Institute Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2014 | Catskill Mountainkeeper Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Hudson River Foundation for Science And | 990 | Chairman Until (12/11/14) | 2 | $0 | $0 | View return |
| 2014 | Open Space Institute Land Trust Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2014 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2014 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2014 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2013 | Friends of Hudson River Greenway | 990EZ | Board Member | 0 | $0 | $0 | View return |
| 2013 | Open Space Institute Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2013 | Catskill Mountainkeeper Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Cary Institute of Ecosystem Studies Inc | 990 | Secretary | 1 | $0 | $0 | View return |
| 2013 | Hudson River Foundation for Science And | 990 | Chairman | 2 | $0 | $0 | View return |
| 2013 | Wave Hill Incorporated | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | The Wilderness Society | 990 | Gov Council Member (To Oct '13) | 2 | $0 | $0 | View return |