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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 Space Science Institute Dr Mark Lemmon

Dr Mark Lemmon

SR Research Scient at Space Science Institute

Fiscal year ended December 31, 2024. Published on January 25, 2026.

$271,526
2024

Total compensation

Dr Mark Lemmon has been listed as an employee of Space Science Institute in Form 990 filings since fiscal year 2019. Total compensation for Dr Mark Lemmon has increased by 24.3% from 2019 to 2024.

Annual compensation details

$271,526
-9.2%
SR Research Scient
2024
$247k org
34.9 hrs/wk
$26k other
--
$298,976
+10.1%
Senior Research Scientist
2023
$273k org
40 hrs/wk
$27k other
--

Total compensation by year

Compare the compensation of Dr Mark Lemmon to:

2024

Other employees at Space Science Institute

Dr Joseph Borovsky
SR Research Scient
$345,268
$300,792 from orgNo related comp$44,476 other
Carl R Wuth II
Director of BUS OPER
$272,080
$226,642 from orgNo related comp$45,438 other
Dr Ralph Shuping
Deputy Director
$237,454
$216,292 from orgNo related comp$21,162 other
Dr James Harold
Director INFO SYS and TEC
$231,428
$189,457 from orgNo related comp$41,971 other
Dr Michael Wolff
Executive Director
$224,906
$181,994 from orgNo related comp$42,912 other
Dr Julianne Moses
SR Research Scient
$222,754
$182,367 from orgNo related comp$40,387 other
Dr Vadim Roytershteyn
SR Research Scient
$171,907
$156,017 from orgNo related comp$15,890 other
Jennifer Griest
Secretary
$119,300
$109,187 from orgNo related comp$10,113 other
Dr Karly M Pitman
Executive Director
$117,519
$106,518 from orgNo related comp$11,001 other
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Revisions to this profile

January 25, 2026:
2024 Space Science Institute 990 published
January 25, 2026:
2023 Space Science Institute 990 published
January 25, 2026:
2022 Space Science Institute 990 published

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