| 2023 | American Academy of Diplomacy | 990 | Director | 0.25 | $0 | $0 | View return |
| 2023 | Elderhostel Inc DBA Road Scholar | 990 | Vice Chair (Thru 06/24) & Director | 2 | $0 | $0 | View return |
| 2023 | The Trustees of Grinnell College | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | Elderhostel Inc DBA Road Scholar | 990 | Vice Chair (Eff 06/23) & Director | 2 | $0 | $0 | View return |
| 2022 | American Academy of Diplomacy | 990 | Director | 0.25 | $0 | $0 | View return |
| 2022 | Endowment of the Us Institute of Peace | 990 | Chairman (Until 4/2023) | 1 | $0 | $0 | View return |
| 2022 | Endowment of the Us Institute of Peace | 990 | Chairman (Until 4/2023) | 1 | $0 | $0 | View return |
| 2022 | The Trustees of Grinnell College | 990 | Trustee | 2 | $0 | $0 | View return |
| 2021 | American Academy of Diplomacy | 990 | Director | 0.25 | $0 | $0 | View return |
| 2021 | Elderhostel Inc DBA Road Scholar | 990 | Director (Eff June 2022) | 1 | $0 | $0 | View return |
| 2021 | The Trustees of Grinnell College | 990 | Trustee | 3 | $0 | $0 | View return |
| 2021 | Endowment of the Us Institute of Peace | 990 | Chairman | 1 | $0 | $0 | View return |
| 2020 | The Trustees of Grinnell College | 990 | Trustee | 2 | $0 | $0 | View return |
| 2020 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2019 | Elderhostel Inc DBA Road Scholar | 990 | Director (Thru Feb 2020) | 1 | $0 | $0 | View return |
| 2019 | The Trustees of Grinnell College | 990 | Trustee | 2 | $0 | $0 | View return |
| 2019 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2018 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | The Trustees of Grinnell College | 990 | Trustee & Vice Chair | 4 | $0 | $0 | View return |
| 2018 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2017 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | The Trustees of Grinnell College | 990 | Trustee & Vice Chair | 2 | $0 | $0 | View return |
| 2017 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2016 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $11,052 | View return |
| 2016 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Search for Common Ground | 990 | Board Member (Retired 11/16) | 0.5 | $0 | $0 | View return |
| 2016 | The Trustees of Grinnell College | 990 | Trustee & Vice Chair | 2 | $0 | $0 | View return |
| 2015 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $7,030 | View return |
| 2015 | Search for Common Ground | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2015 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The Trustees of Grinnell College | 990 | Trustee | 2 | $0 | $0 | View return |
| 2014 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $23,481 | View return |
| 2014 | Atlantic Council of the United States Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Search for Common Ground | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2014 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | The Trustees of Grinnell College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Endowment of the Us Institute of Peace | 990 | Vice Chairman | 1 | $0 | $13,261 | View return |
| 2013 | Elderhostel Inc DBA Road Scholar | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Atlantic Council of the United States Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | Atlantic Council of the United States Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | Search for Common Ground | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2013 | The Trustees of Grinnell College | 990 | Trustee | 0 | $0 | $0 | View return |