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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 Great Schools Partnership Inc Mark Kostin

Mark Kostin

Highest compensated employee

Associate Director at Great Schools Partnership Inc

Fiscal year ended June 30, 2022. Published on January 25, 2026.

$146,326
2022

Total compensation

Mark Kostin has been listed as an employee of Great Schools Partnership Inc in Form 990 filings since fiscal year 2017. Total compensation for Mark Kostin has increased by 20.5% from 2017 to 2022.

Annual compensation details

$146,326
+6.2%
Associate Director
2022
$123k org
40 hrs/wk
$25k other
--
$137,808
-4.1%
Associate Director
2021
$112k org
40 hrs/wk
$26k other
--

Total compensation by year

Compare the compensation of Mark Kostin to:

2022

Other employees at Great Schools Partnership Inc

David J Ruff
Executive Director
$160,368
$144,140 from orgNo related comp$16,228 other
Katie M Thompson
Co-Director of Coaching
$116,116
$102,975 from orgNo related comp$13,141 other
Michelle Milstein
Co-Director of Coaching
$114,629
$100,289 from orgNo related comp$14,340 other
Christina Horner
Senior Associate
$112,435
$100,159 from orgNo related comp$12,276 other
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Revisions to this profile

January 25, 2026:
2022 Great Schools Partnership Inc 990 published
January 24, 2026:
2021 Great Schools Partnership Inc 990 published
January 24, 2026:
2020 Great Schools Partnership Inc 990 published

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$143,767
+2%
Associate Director
2020
$121k org
40 hrs/wk
$24k other
--
$140,966
-0.1%
Associate Director
2019
$122k org
40 hrs/wk
$20k other
--
$141,103
+16.2%
Associate Director
2018
$119k org
40 hrs/wk
$24k other
--
$121,421
Associate Director
2017
$106k org
40 hrs/wk
$17k other
--