| 2024 | Girls Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | Alpha Nu Education Foundation | 990 | Director (Former) | 0.5 | $0 | $0 | View return |
| 2023 | Institute for Defense Analyses | 990 | Trustee | 4 | $25,250 | $0 | View return |
| 2023 | Alpha Nu Education Foundation | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | California Institute of Technology | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | Institute for Defense Analyses | 990 | Trustee | 4 | $17,500 | $0 | View return |
| 2022 | Alpha Nu Education Foundation | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | California Institute of Technology | 990 | Trustee | 2 | $0 | $0 | View return |
| 2021 | Institute for Defense Analyses | 990 | Trustee | 4 | $33,500 | $0 | View return |
| 2021 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2020 | Institute for Defense Analyses | 990 | Trustee, Chair Audit Committee | 4 | $32,250 | $0 | View return |
| 2020 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2020 | California Institute of Technology | 990 | Trustee | 8 | $0 | $0 | View return |
| 2019 | Institute for Defense Analyses | 990 | Trustee, Chair Audit Committee | 4 | $28,750 | $0 | View return |
| 2019 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2019 | California Institute of Technology | 990 | Trustee | 10.5 | $0 | $0 | View return |
| 2018 | Institute for Defense Analyses | 990 | Trustee, Chair Audit Committee | 4 | $27,500 | $0 | View return |
| 2018 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2018 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2017 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Institute for Defense Analyses | 990 | Trustee | 4 | $17,250 | $0 | View return |
| 2016 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2016 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Institute for Defense Analyses | 990 | Trustee | 2 | $10,500 | $0 | View return |
| 2015 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2015 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Institute for Defense Analyses | 990 | Trustee | 2 | $0 | $0 | View return |
| 2014 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2014 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Institute for Defense Analyses | 990 | Trustee | 2 | $0 | $0 | View return |
| 2013 | Alpha Nu Education Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2013 | California Institute of Technology | 990 | Trustee | 1 | - | - | View return |