Mary Williamson

Co-Treasurer at Mercer Island High School PTSA 2950

Fiscal year ended June 30, 2021. Published on January 25, 2026.

2021

Total compensation

Mary Williamson has been listed as an employee of Mercer Island High School PTSA 2950 in Form 990 filings since fiscal year 2020.

Annual compensation details

Co-Treasurer

2021

Co-Treasurer

2020

2021

Other employees at Mercer Island High School PTSA 2950

Alison Monen

Co-Vice President, Communications

Anne-Christine Poncelet

Co-Vice President, Communications

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Revisions to this profile

January 25, 2026:

2021 Mercer Island High School PTSA 2950 990 published

January 24, 2026:

2020 Mercer Island High School PTSA 2950 990 published

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