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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 International Institute for Applied Systems Analysis Iain Stewart

Iain Stewart

Highest compensated employee

HEAD of COMM and External Relations at International Institute for Applied Systems Analysis

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

$163,370
2021

Total compensation

Iain Stewart has been listed as an employee of International Institute for Applied Systems Analysis in Form 990 filings since fiscal year 2020. Total compensation for Iain Stewart has increased by 5.1% from 2020 to 2021.

Annual compensation details

$163,370
+5.1%
HEAD of COMM and External Relations
2021
$153k
40 hrs/wk
$11k
--
$155,415
HEAD of COMM and External Relations
2020
$138k
40 hrs/wk
$18k
--

Total compensation by year

Compare the compensation of Iain Stewart to:

Revisions to this profile

January 25, 2026:
2021 International Institute for Applied Systems Analysis 990 published
January 24, 2026:
2020 International Institute for Applied Systems Analysis 990 published

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2021

Other employees at International Institute for Applied Systems Analysis

Dr Albert van Jaarsveld
Director General/Ceo (Until JUNE 2021)
$321,017
$310,063 No related comp$10,954
Dr Ulf Dieckmann
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$264,500 No related comp$42,363
Dr Leena Srivastava
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$227,922
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Mag Christiane Pohn-Hufnagl
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Dr Keywan Riahi
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Dr Elena Rovenskaya
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