| 2025 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2024 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2023 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2022 | Bosler Humane Society Inc | 990 | Director | - | $0 | $0 | View return |
| 2022 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2022 | Door County Historical Society | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Door County Historical Society | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2020 | Door County Historical Society | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2020 | League of Women Voters of New Jersey | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Soy Nutrition Institute Inc | 990EZ | Member | 0.1 | $0 | $0 | View return |
| 2020 | League of Women Voters of New Jersey Education Fund | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Door County Historical Society | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | New Jersey Black Issues Convention Inc. | 990 | Board Member | 2 | $0 | $0 | View return |
| 2019 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2019 | League of Women Voters of New Jersey Education Fund | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | League of Women Voters of New Jersey | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Door County Historical Society | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Louisville Society for Human Resource Management Inc | 990EZ | President & Board Member | 1 | $0 | $0 | View return |
| 2018 | New Jersey Black Issues Convention Inc. | 990 | Board Member | 0 | $0 | $0 | View return |
| 2018 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2018 | League of Women Voters of New Jersey | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | League of Women Voters of New Jersey Education Fund | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | The William a Williamson Family Foundation | 990PF | VP, Director | 1 | $0 | $0 | View return |
| 2017 | Louisville Society for Human Resource Management Inc | 990EZ | President & Board Member | 1 | $0 | $0 | View return |
| 2017 | New Jersey Black Issues Convention Inc. | 990 | Board Member | 5 | $0 | $0 | View return |
| 2017 | Quincy Medical Group Healthcare Foundation | 990EZ | CFO, Board Member | 0 | $0 | $0 | View return |
| 2017 | Maitland Area Chamber of Commerce Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Electronic and Space Technicians Local No 1553 | 990 | Conductor | 1 | $1,929 | $0 | View return |
| 2016 | The William a Williamson Family Foundation | 990PF | VP / Director | 1 | $0 | $0 | View return |
| 2016 | Quincy Medical Group Healthcare Foundation | 990EZ | CFO, Board Member | 0 | $0 | $0 | View return |
| 2016 | Maitland Area Chamber of Commerce Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Quincy Medical Group Healthcare Foundation | 990EZ | CFO, Board Member | 0 | $0 | $0 | View return |
| 2015 | The William a Williamson Family Foundation | 990PF | VP / Director | 1 | $0 | $0 | View return |
| 2014 | The William a Williamson Family Foundation | 990PF | VP | 1 | $0 | - | View return |
| 2013 | Quincy Medical Group Healthcare Foundation | 990EZ | Treasurer | 0 | $0 | $0 | View return |
| 2013 | The William a Williamson Family Foundation | 990PF | VP | 1 | $0 | - | View return |
| 2012 | The William a Williamson Family Foundation | 990PF | VP | 1 | $0 | - | View return |
| 2011 | The William a Williamson Family Foundation | 990PF | Vice President | 1 | $0 | - | View return |
| 2010 | The William a Williamson Family Foundation | 990PF | Vice President | 1 | $0 | - | View return |