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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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Organizations Public & Societal Benefit California Independent System Operator Corporation

California Independent System Operator Corporation

Fiscal year ending 2020. Filed on November 12, 2021.

250 Outcropping Way
Folsom, California 95630

California Independent System Operator Corporation (EIN: 94-3274043) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2020 IRS Form 990 filing, California Independent System Operator Corporation, a 501(c)(3) charitable organization, reported compensation for 25 out of 684 total employees. Among the employees shown here, the average compensation is $530,508. The highest compensated employee at California Independent System Operator Corporation is Stephen Berberich with fiscal year 2020 compensation of $1,969,754.

Revenue, expenses, and employee compensation

Revenue

$249,838,855

Expenses

$224,279,628

Employee compensation

$138,788,888
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

Stephen Berberich
Chief Executive Officer Emeritus
$1,969,754
$1,772,333 No related comp$197,421
Mark Rothleder
Senior Vice President and Chief Operating OFF
$995,452
$850,109 No related comp$145,343
Petar Ristanovic
Vice President, Technology
$896,608
$796,598 No related comp$100,010
Roger Collanton
Vice President, GEN CNSL and Chief COMP OFF
$850,168
$746,456 No related comp$103,712
Eric Schmitt
Vice President, Operations
$844,903
$744,203 No related comp$100,700
Stacey Crowley
Vice President, External and Customer AFF
$740,097
$644,150 No related comp$95,947
Ryan Seghesio
Vice President, CFO and Treasurer
$657,445
$549,965 No related comp$107,480
Jodi Ziemathis
Vice President, Human Resources
$627,190
$522,711 No related comp$104,479
Keith Casey
Vice President, MKT and Infrastructure DEV
$567,302
$523,723 No related comp$43,579
Neil Millar
Vice President, Infrastructure and OPS PLAN
$526,921
$428,843 No related comp$98,078
Khaled Abdul-Rahman
Vice President, PWR Systems and Market TECH
$488,149
$412,621 No related comp$75,528
Anthony Ivancovich
Deputy GEN CNSL - Regulatory
$486,971
$410,399 No related comp$76,572

Benchmark Employee Compensation

Non-Employee Board Members

No board members were reported during this fiscal year.

Contractors

Siemens Industry Inc.
Engineering
$11,084,933
Corestaff Services
Temporary Staffing
$4,971,671
Att
Telecomm.
$2,330,575
Open Access Technology Internationa
Consulting
$1,609,490
Teksystems
Consulting
$1,033,009

Mission Statement

TO ENSURE EFFICIENT USE AND RELIABLE OPERATION OF THE ELECTRIC TRANSMISSION GRID OPERATED BY THE CALIFORNIA ISO, CONSISTENT WITH THE CALIFORNIA PUBLIC UTILITY CODE, CHAPTER 2.3 PART 1, DIVISION 1. (CONTINUED ON SCHEDULE O.)THE ISO DOES NOT OWN TRANSMISSION FACILITIES, BUT IT CONTROLS THE OPERATION OF A NETWORK OF TRANSMISSION FACILITIES LOCATED THROUGHOUT MOST OF CALIFORNIA, AND ALSO CERTAIN TRANSMISSION FACILITIES LOCATED IN NEVADA, THE OWNERS OF WHICH HAVE TRANSFERRED OPERATIONAL CONTROL TO THE CALIFORNIA ISO. FOR THE BENEFIT OF OUR CUSTOMERS, WE:- OPERATE THE GRID RELIABLY AND EFFICIENTLY;- PROVIDE FAIR AND OPEN TRANSMISSION ACCESS;- PROMOTE ENVIRONMENTAL STEWARDSHIP; AND- FACILITATE EFFECTIVE MARKETS AND PROMOTE INFRASTRUCTURE DEVELOPMENT, ALL THROUGH THE PROVISION OF TIMELY AND ACCURATE INFORMATION.

Revisions to this organization profile

November 10, 2025:
2024 California Independent System Operator Corporation 990 filed
November 13, 2024:
2023 California Independent System Operator Corporation 990 filed
November 10, 2023:
2022 California Independent System Operator Corporation 990 filed

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