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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 Hdf Group John Mainzer

John Mainzer

Highest compensated employee

Senior Software Engineer at The Hdf Group

Fiscal year ended December 31, 2021. Published on January 25, 2026.

$137,765
2021

Total compensation

John Mainzer has been listed as an employee of The Hdf Group in Form 990 filings since fiscal year 2017. Total compensation for John Mainzer has increased by 14.3% from 2017 to 2021.

Annual compensation details

$137,765
+3%
Senior Software Engineer
2021
$132k org
40 hrs/wk
$7k other
--
$133,767
+2.1%
Senior Software Engineer
2020
$128k org
31 hrs/wk
$7k other
--

Total compensation by year

Compare the compensation of John Mainzer to:

2021

Other employees at The Hdf Group

John Readey
Director of Tools and CLOU
$184,460
$159,410 from orgNo related comp$25,050 other
Elena Pourmal
Treasurer
$172,859
$162,535 from orgNo related comp$10,324 other
Dax Rodriguez
Director of Commercial Service
$161,504
$153,659 from orgNo related comp$7,845 other
Gerd Heber
HDF5 Database and HIGH PER
$152,057
$134,480 from orgNo related comp$17,577 other
Vanisha Taylor
Chief Financial Officer
$150,806
$133,219 from orgNo related comp$17,587 other
Dana Robinson
Senior Software Engineer
$144,783
$138,264 from orgNo related comp$6,519 other
Michael J Folk
Secretary
$103,794
$103,794 from orgNo related compNo other comp
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Revisions to this profile

January 25, 2026:
2021 The Hdf Group 990 published
January 24, 2026:
2020 The Hdf Group 990 published
January 24, 2026:
2019 The Hdf Group 990 published

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