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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 California Independent System Operator Corporation Elliot Mainzer

Elliot Mainzer

Officer

President and Chief Executive Officer at California Independent System Operator Corporation

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

$938,188
2021

Total compensation

Elliot Mainzer has been listed as an employee of California Independent System Operator Corporation in Form 990 filings since fiscal year 2020. Total compensation for Elliot Mainzer has increased by 125.8% from 2020 to 2021.

Annual compensation details

$938,188
+125.8%
President and Chief Executive Officer
2021
$835k org
40 hrs/wk
$104k other
--
$415,565
President and Chief Executive Officer
2020
$396k org
40 hrs/wk
$20k other
--

Total compensation by year

Compare the compensation of Elliot Mainzer to:

2021

Other employees at California Independent System Operator Corporation

Mark Rothleder
Senior Vice President and Chief Operating OFF
$1,161,572
$987,946 from orgNo related comp$173,626 other
Stephen Berberich
Chief Executive Officer Emeritus
$1,139,302
$1,071,776 from orgNo related comp$67,526 other
Roger Collanton
Vice President, GEN CNSL and Chief COMP OFF
$915,596
$800,768 from orgNo related comp$114,828 other
Stacey Crowley
Vice President, External Affairs
$798,414
$695,020 from orgNo related comp$103,394 other
Petar Ristanovic
Vice President, Technology
$786,767
$786,767 from orgNo related compNo other comp
Ryan Seghesio
Vice President, CFO and Treasurer
$732,037
$613,511 from orgNo related comp$118,526 other
Neil Millar
Vice President, Infrastructure and OPS PLAN
$718,812
$600,642 from orgNo related comp$118,170 other
Jodi Ziemathis
Vice President, Human Resources
$682,218
$564,802 from orgNo related comp$117,416 other
Eric Schmitt
Vice President, Operations
$552,971
$507,636 from orgNo related comp$45,335 other
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Revisions to this profile

January 25, 2026:
2021 California Independent System Operator Corporation 990 published
January 24, 2026:
2020 California Independent System Operator Corporation 990 published

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