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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 Exploratorium Robert Semper

Robert Semper

Key employee

Chief Learning Officer at The Exploratorium

Fiscal year ended June 30, 2024. Published on January 25, 2026.

$331,164
2024

Total compensation

Robert Semper has been listed as an employee of The Exploratorium in Form 990 filings since at least fiscal year 2016. Total compensation for Robert Semper has increased by 27.1% from 2016 to 2024.

Annual compensation details

$331,164
+3.8%
Chief Learning Officer
2024
$315k org
37.5 hrs/wk
$17k other
--
$319,050
+58%
Chief Science Officer
2023
$303k org
37.5 hrs/wk
$17k other
--

Total compensation by year

Compare the compensation of Robert Semper to:

2024

Other employees at The Exploratorium

Mark Bierman
Executive Director
$609,010
$583,952 from orgNo related comp$25,058 other
Phoebe White
Chief Operating OFC (Thru 9/22/23)
$355,135
$344,719 from orgNo related comp$10,416 other
Laura Zander
Chief Financial and Operating Officer
$324,313
$286,820 from orgNo related comp$37,493 other
Blair Winn
Chief Advancement Officer
$280,758
$257,640 from orgNo related comp$23,118 other
Julie Nunn
Chief Brand Officer
$237,780
$216,235 from orgNo related comp$21,545 other
Anne Richardson
Chief Experience Officer
$232,308
$215,636 from orgNo related comp$16,672 other
Jason Pacely
Chief People Officer
$232,173
$209,277 from orgNo related comp$22,896 other
Thomas Rockwell
Chief Creative Officer
$212,111
$183,092 from orgNo related comp$29,019 other
Anne Holmes
Chief Strategy Officer
$200,438
$181,139 from orgNo related comp$19,299 other
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Revisions to this profile

January 25, 2026:
2024 The Exploratorium 990 published
January 25, 2026:
2023 The Exploratorium 990 published
January 25, 2026:
2022 The Exploratorium 990 published

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