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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Employees The Potomac School William Cook

William Cook

Highest compensated employee

ASST HOS for Academics at The Potomac School

Fiscal year ended June 30, 2016. Published on January 24, 2026.

$186,698
2016

Total compensation

William Cook has been listed as an employee of The Potomac School in Form 990 filings since at least fiscal year 2016.

Annual compensation details

$186,698
ASST HOS for Academics
2016
$158k org
50 hrs/wk
$29k other
--

Total compensation by year

Compare the compensation of William Cook to:

2016

Other employees at The Potomac School

John J Kowalik
Head of School
$671,630
$560,995 from orgNo related comp$110,635 other
Donald Firke
HEAD, Upper School
$241,204
$163,960 from orgNo related comp$77,244 other
Barbara Overstreet
Director, Advancement
$223,713
$188,320 from orgNo related comp$35,393 other
John Mathews
HEAD, Middle and Intermediate Schools
$212,082
$149,480 from orgNo related comp$62,602 other
Charlotte Nelsen
Director, Admission and FIN AID
$176,385
$156,784 from orgNo related comp$19,601 other
Dyana Conroy
Chief Financial Officer and Chief Operating Officer
$161,970
$126,092 from orgNo related comp$35,878 other
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Revisions to this profile

January 24, 2026:
2016 The Potomac School 990 published

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