Person · officer / director

Marcus Siezing

Treasurer at The Polg Foundation INC. Listed as an officer, director, or key employee across 4 organizations on the Form 990 record.

This is me

Ambiguous identity This name matches 1 other individual we could not verify as the same person. Each is kept as a separate record below — treat them as distinct people unless an explicit match is confirmed.

Organizations

Roles reported

Others who share this name

Who this is

Profile

The filed facts are verified from the IRS filings. The biography is compiled from public web sources and grounded to that filed record.

✓ Verified from filings

●

Reported as Treasurer of The Polg Foundation INC, based in New York, NY.

●

Also listed as Treasurer of Clarence and Anne Dillon Dunwalke Trust, uncompensated.

●

Also listed as Vice President, Treasurer of Dillon Fund, uncompensated.

Facts extracted directly from each organization's Form 990, Part VII.

Biography In progress

We're building a sourced biography for every person — from filings, news, and public records, citing where each fact comes from. Person-name searches are our single largest source of demand, so this is what we're shipping next.

Affiliations

Organizations

Linked as the same person by IRS Schedule R, a shared officer mailing address, or shared fellow board members.

The Polg Foundation INC Treasurer · $3.4M revenue · New York, NYTHE PURPOSES FOR WHICH THE FOUNDATION IS FORMED ARE TO ADDRESS THE UNMET MEDICAL NEEDS OF PATIENS WITH POLG-RELATED DISORDERS WITH THE GOAL OF BEING…Filed FY2025, FY2024, FY2023, FY2022, FY2021 · Source: Form 990, Part VII

Clarence and Anne Dillon Dunwalke Trust Treasurer · $2.0M revenue · New York, NYFiled FY2024, FY2023 · Source: Form 990, Part VII

Dillon Fund Vice President, Treasurer · $2.6M revenue · New York, NYFiled FY2024, FY2023, FY2022, FY2021 · Source: Form 990, Part VII

The Allen Family Foundation INC Treasurer · $2.4M revenue · New York, NYFiled FY2024, FY2023, FY2022, FY2021, FY2020, FY2019 · Source: Form 990, Part VII

Disambiguation

Other people named Marcus Siezing

Different individuals who share this name, separated by IRS Schedule R, mailing address, and shared-board evidence. The 990 carries no person identifier, so some may still be the same person.

Marcus Siezing 1 organization · New York, NYThe American-Scandinavian Foundation

Network

Serves alongside

Other officers, directors & key employees at this person's organizations, by latest reported compensation.

Brian Tseng

Director / Cso · FY2025

$316K

Olivier Gerrits

Executive Director · FY2022

$226K

Samuel Seward

Executive Dir. · FY2024

$197K

Alexandra F Allen

President/Director · FY2024

Dorothy C Echodu

Vice President/Director · FY2024

Eileen B Kane

Secretary · FY2024

Andrew D Allen

VP of Finance/Director · FY2024

Director · FY2024

Director · FY2024

Director · FY2024

Director · FY2024

Director · FY2024

Network

Recommendations

Written by other verified members of the network — visible once you're a verified person yourself.

Loading…

Explore

Similar organizations

Nonprofits working in the same field — explore who else operates in this space.

World Federation of Hemophilia USA$1.1B revenue · Albany, NY

Cystic Fibrosis Foundation$355.8M revenue · Bethesda, MD

United Cerebral Palsy Associations of New York State INC$274.1M revenue · New York, NY

United Cerebral Palsy of New York City INC$242.7M revenue · New York, NY

Center for Disability Services INC$125.8M revenue · Albany, NY

Upstate Cerebral Palsy INC$124.6M revenue · Utica, NY

People like this

Similar leaders

Leaders at organizations in the same field, by reported compensation.

Liliana C Goumnerova MD

Physician · Boston Pediatric Neurosurgical Foundation INC

$4.8M

Nancy Brown

CEO · American Heart Association INC

$4.5M

Richard W Brown

Director/Chair/Pres/CEO · Stowers Resource Management INC

$3.0M

John C Mahler JR

Chief Investment Officer · Cystic Fibrosis Foundation

$2.7M

Jack Mahler MD

Chief Investment Officer · Cystic Fibrosis Foundation

$2.5M

Balagopalan Nair MD

Medical Oncology · Central Arkansas Radiation Therapy

$2.1M