One Schoolhouse Inc
Donations deductibleOne Schoolhouse Inc's network
11 people1 organisationi11 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (11). Violet dotted lines (1) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.The board
11 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 11 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.| Name | Role as filed | Since | On the board |
|---|---|---|---|
| NAA-Adei Kotey Chair (also filed as Naa-Adei Kotey) | Chair | 2021 | 5 yrs |
| Scott Griggs Chair | Chair Elect | 2021 | 5 yrs |
| Ann Klotz (also filed as Ann Klotz) | Company secretary | 2022 | 4 yrs |
| Carla Ellis | Trustee | 2023 | 3 yrs |
| Felicia Wilks | Trustee | 2024 | 2 yrs |
| Jennifer Aguilar | Trustee | 2022 | 4 yrs |
| Jennifer Osland | Trustee | 2025 | 1 yr |
| Joel Sohn | Trustee | 2024 | 2 yrs |
| Justin Brandon | Trustee | 2024 | 2 yrs |
| Rob Dimartino (also filed as Rob Dimartino) | Trustee | 2022 | 4 yrs |
| Sean Raymond | Treasurer | 2020 | 6 yrs |
Officers and senior leadership
17 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.| Name | Title as filed | On the filings |
|---|---|---|
| Albert Throckmorton | Vice President | 2018 |
| Brad Rathgeber | President & CEO | since 2018 |
| Corinne Dedini | Senior Director | since 2021 |
| Curt Brossman | Sr. Director, Finance | since 2024 |
| Elizabeth Katz | Senior Director | since 2021 |
| Erin Rehel | Chief Operating Officer | since 2024 |
| Gretchen Kane | Treasurer | 2021 |
| James Palmeiri | Treasurer | 2020 |
| James Palmieri | President | 2021 |
| Jasper McElrath | Director, Digital Marketing | 2025 |
| Jeff Shields | Treasurer | 2018 |
| Jemma Kennedy | Company secretary | 2018 |
| Kathryn Albee | Company secretary | 2020 |
| Kathryn Purcell | Company secretary | since 2018 |
| Sarah Hanawald | Senior Director | since 2023 |
| Sarah Wike | Sr. Director, Academic Program | 2025 |
| Susanna Jones | Vice President | since 2020 |
Pay and hours
year to 31 August 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.| Name | Title as filed | Hours a week | Pay from the organisation | Related organisations | Other |
|---|---|---|---|---|---|
| Brad Rathgeber | President & CEO | 40 | $436k | $46k | |
| Erin Rehel | Chief Operating Officer | 40 | $177k | $17k | |
| Sarah Hanawald | Exec.Dir.,Assoc.for Acad.Leaders | 40 | $140k | $21k | |
| Sarah Wike | Sr. Director, Academic Program | 40 | $131k | $14k | |
| Curt Brossman | Sr. Director, Finance | 40 | $125k | $15k | |
| Jasper McElrath | Director, Digital Marketing | 40 | $100k | $11k | |
| Jennifer Aguilar | Trustee | 1 | $0 | ||
| Justin Brandon | Trustee | 1 | $0 | ||
| Rob Dimartino | Trustee | 1 | $0 | ||
| Carla Ellis | Trustee | 1 | $0 | ||
| Scott Griggs | Chair Elect | 1 | $0 | ||
| Ann Klotz | Secretary | 2 | $0 | ||
| Naa-Adei Kotey | Chair | 5 | $0 | ||
| Jennifer Osland | Trustee | 1 | $0 | ||
| Sean Raymond | Treasurer | 2 | $0 | ||
| Joel Sohn | Trustee | 1 | $0 | ||
| Felicia Wilks | Trustee | 1 | $0 |
About
- Legal name
- One Schoolhouse Inc
- EIN
- 270417089
- Address
- 1015 15th St Nw Ste 1025, Washington, DC, 20005-2647
- State
- District of Columbia
- Mission
- We partner with independent schools to advance their diverse approaches to education, primarily through programs for high school-aged students. (as filed on the Form 990)
- Activity (NTEE)
- B90 Education
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Education
- Size band
- 7 (IRS master file code)
- Formed
- 2009
- Principal officer
- Brad Rathgeber (as named on the Form 990)
- IRS ruling date
- 1 March 2010
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 7, latest 2025
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥6years on the filingsSean Raymond
≥5years on the filingsNAA-Adei Kotey
≥5years on the filingsScott Griggs
≥4years on the filingsAnn Klotz
Latest return
year to 31 August 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 August 2025. US dollars, as filed.- Total assets
- $5.4m
- Total liabilities
- $1.7m
- Net assets or fund balances
- $3.6m
- Contributions and grants received
- $0
- Program service revenue
- $4.2m
- Employees
- 108
Filed finances
1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.| Tax year | Total revenue | Total expenses | Surplus or deficit |
|---|---|---|---|
| 2023 | $4.2m | $4.2m | $28k |
As filed on the IRS Form 990. US dollars.
State registration
1 entityiBusiness-entity registers published by US states. These records are matched to this organisation by name and state, not by EIN, and are labelled as likely matches. Street addresses are not shown.One Schoolhouse, Inc. likely matchiMatched by exact name and state (and ZIP where shown). State registers do not publish EINs, so this is not a confirmed match. Source: DC Department of Licensing and Consumer Protection (DLCP), corporate registrations (opendata.dc.gov). Licence: CC BY 4.0. Attribution: DC DLCP. Data last fetched 18 October 2026.
- State
- District of Columbia
- Entity type
- Domestic Nonprofit Corporation
- Status
- Active - In Good Standing
- Formed
- 25 August 2011
- Registered agent
- Incorp Services, Inc. (city and state not held)