Society of Environmental Toxicology and Chemistry of North America Inc
Donations deductibleSociety of Environmental Toxicology and Chemistry of North America Inc's network
22 people2 organisationsi22 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (22). Violet dotted lines (5) 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
22 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.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 22 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 |
|---|---|---|---|
| Adam R Wronski (also filed as Adam Wronski) | Member | 2023 | 3 yrs |
| Alan Jones | At large - Exco | 2023 | 3 yrs |
| Amila De Silva | Member | 2022 | 4 yrs |
| Austin Gray | Member | 2022 | 4 yrs |
| Bonnie Ertel | Member | 2023 | 3 yrs |
| Carla Ng | Member | 2023 | 3 yrs |
| Chris Stransky | Member | 2023 | 3 yrs |
| Guy Gilron | Member | 2023 | 3 yrs |
| Katherine Coady (also filed as Katie Coady) | Member | 2022 | 4 yrs |
| Katy Chung | Member | 2023 | 3 yrs |
| Mark McMaster | Member | 2023 | 3 yrs |
| Mark S Johnson (also filed as Mark Johnson) | Vice President | 2022 | 4 yrs |
| Martha Georgina Orozco-Medina (also filed as Martha Orozco-Medina) | Member | 2022 | 4 yrs |
| Michele Harmon | Member | 2024 | 2 yrs |
| Nile Kemble | President | 2020 | 6 yrs |
| Patricia Ramrez Romero | Member | 2024 | 2 yrs |
| Ruth Sofield | Member | 2023 | 3 yrs |
| Ryan Otter | Member | 2024 | 2 yrs |
| Scott Lynn | Member | 2024 | 2 yrs |
| Shawn Sager | Member | 2023 | 3 yrs |
| Teresa Norberg-King | Secretary-Treasurer | 2018 | 8 yrs |
| Tisha King-Heiden | Immediate Past President | 2018 | 8 yrs |
Officers and senior leadership
3 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 |
|---|---|---|
| Greg Schiefer | Executive Director | since 2018 |
| Linda Fenner | Manager, Finacial Services | since 2018 |
| Tamar Schlekat | Scienific Affairs Manager | since 2020 |
Pay and hours
year to 31 December 2024iFrom 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 |
|---|---|---|---|---|---|
| Tamar Schlekat | Executive Director | 20 | $182k | $7k | |
| Nile Kemble | President | 4 | $0 | ||
| Mark Johnson | Vice President | 3 | $0 | ||
| Teresa Norberg-King | Secretary-Treasurer | 3 | $0 | ||
| Tisha King-Heiden | Immediate Past President | 1 | $0 | ||
| Alan Jones | At large - Exco | 3 | $0 | ||
| Katy Chung | Member | 1 | $0 | ||
| Katie Coady | Member | 1 | $0 | ||
| Amila De Silva | Member | 1 | $0 | ||
| Bonnie Ertel | Member | 1 | $0 | ||
| Guy Gilron | Member | 1 | $0 | ||
| Austin Gray | Member | 1 | $0 | ||
| Michele Harmon | Member | 1 | $0 | ||
| Scott Lynn | Member | 1 | $0 | ||
| Mark McMaster | Member | 1 | $0 | ||
| Carla Ng | Member | 1 | $0 | ||
| Martha Georgina Orozco-Medina | Member | 1 | $0 | ||
| Ryan Otter | Member | 1 | $0 | ||
| Patricia Ramrez Romero | Member | 1 | $0 | ||
| Shawn Sager | Member | 1 | $0 | ||
| Ruth Sofield | Member | 1 | $0 | ||
| Chris Stransky | Member | 1 | $0 | ||
| Adam R Wronski | Member | 1 | $0 |
About
- Legal name
- Society of Environmental Toxicology and Chemistry of North America Inc
- EIN
- 371482800
- Address
- 712 H Street Ne 1889, Washington, DC, 20002-3627
- State
- District of Columbia
- Mission
- Promote environmental science and management through education, collaboration, communication and leadership. (as filed on the Form 990)
- Activity (NTEE)
- U03 Science and technology research
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Science & Technology
- Size band
- 6 (IRS master file code)
- Formed
- 2004
- Principal officer
- Tamar Schlekat (as named on the Form 990)
- IRS ruling date
- 1 October 2004
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 6, latest 2024
- IRS Publication 78
- PC (contributions deductible)
Most connected
Related organisations (Schedule R)
Relatedpromote environmental science and managementSociety of Environmental Toxicology and Chemistry
Longest observed on the filings
≥8years on the filingsTeresa Norberg-King
≥8years on the filingsTisha King-Heiden
≥6years on the filingsNile Kemble
≥4years on the filingsAmila De Silva
Latest return
year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.- Total assets
- $2.1m
- Total liabilities
- $87k
- Net assets or fund balances
- $2m
- Contributions and grants received
- $861k
- Program service revenue
- $1.1m
- Employees
- 18
- Volunteers
- 30
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 |
|---|---|---|---|
| 2024 | $2m | $2.1m | Deficit $78k |
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.Society of Environmental Toxicology and Chemistry of North America 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
- 11 April 2024
- Registered agent
- C T Corporation System (city and state not held)