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California ISO's Overview

Total employees921
HeadquartersFolsom
Founded1998

The California Independent System Operator (CAISO) is a non-profit, public benefit corporation that manages the flow of electricity across the high-voltage, long-distance power lines that make up about 80% of California's and a small part of Nevada's electric grid. CAISO is dedicated to ensuring grid reliability, facilitating a transparent and efficient wholesale electricity market, and promoting the development and integration of renewable energy resources. It plays a pivotal role in California's ambitious clean energy goals and operates the Western Energy Imbalance Market (WEIM).

Where is California ISO's Headquarters?

HQ Function

Serves as the central hub for grid operations, market management, engineering, IT, and administrative functions. It houses the primary control room for monitoring and managing California's electricity transmission system.

Notable Features:

State-of-the-art control room with advanced monitoring and visualization technologies. The facility is LEED Gold certified, reflecting a commitment to sustainability. Designed for high security and 24/7 operational reliability.

Work Culture:

A mission-driven environment focused on public service, reliability, innovation, and collaboration. Employees are highly skilled professionals, including engineers, analysts, and operators, working in a dynamic and technically challenging field.

HQ Significance:

The Folsom headquarters is critical for the economic and social well-being of California, ensuring the reliable delivery of electricity to millions. It is central to California's efforts in decarbonization and managing an increasingly complex grid with high levels of renewable energy.

Values Reflected in HQ: Reliability, operational excellence, innovation, sustainability (LEED Gold), transparency, and public service.

Location:

While primarily focused on managing the electric grid for approximately 80% of California and a small part of Nevada, California ISO's influence extends significantly across the Western United States and into Canada through its operation of the Western Energy Imbalance Market (WEIM). The WEIM is a real-time wholesale energy trading market that includes participants from numerous states in the Western Interconnection, enhancing grid reliability and economic efficiency across a vast geographic area.

Street Address:

250 Outcropping Way

City:

Folsom

State/Province:

CA

Country:

USA

California ISO's Global Presence

Lincoln, CA, USA

Address: 101 Parkshore Drive, Lincoln, CA 95634

Enhances the resilience of California's power grid management by offering a fully functional alternative operations site in case of disruptions to the main Folsom headquarters, crucial for disaster recovery and business continuity.

Buying Intent Signals for California ISO

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of California ISO

As of April 2025, California ISO' leadership includes:

Elliot Mainzer - President and Chief Executive Officer
Mark Rothleder - Senior Vice President and Chief Operating Officer
Daniele C. H. H. S. X. Dilon - Vice President, Chief Financial Officer and Treasurer
Ryan Seghesio - Vice President, General Counsel and Chief Compliance Officer
Khaled Abdul-Rahman - Vice President, Power Systems & Market Technology
Stacey Crowley - Vice President, External Affairs
John Phipps - Vice President, Business Services and Chief Information Officer
Neil Millar - Vice President, Infrastructure and Operations Planning

Investors of California ISO

California ISO has been backed by several prominent investors over the years, including:

California ISO is a non-profit, public benefit corporation. It is not publicly traded and does not have traditional equity investors. Its operations are funded primarily through a Grid Management Charge (GMC) applied to entities using the transmission services it manages. This charge is subject to approval by the Federal Energy Regulatory Commission (FERC). CAISO is governed by an independent Board of Governors appointed by the Governor of California and confirmed by the State Senate.

Executive New Hires/Exits in the Last 12 Months

Hire2
Exits1

Over the past year, California ISO has experienced key leadership changes, including the appointment of a new Vice President, Chief Financial Officer and Treasurer, and a new Vice President, General Counsel and Chief Compliance Officer. Additionally, a long-serving executive was promoted to Chief Operating Officer.

Departures

Roger Collanton, Roger Collanton retired from his role as Vice President, General Counsel and Chief Compliance Officer.

New Appointments:

Daniele C. H. H. S. X. Dilon, Daniele C. H. H. S. X. Dilon appointed as the new Vice President, Chief Financial Officer and Treasurer.
Ryan Seghesio, Ryan Seghesio appointed as the new Vice President, General Counsel and Chief Compliance Officer.
Mark Rothleder, Mark Rothleder promoted to Senior Vice President and Chief Operating Officer from his previous role as Vice President, Market Policy and Grid Performance.

Technology (Tech Stack) used by California ISO

Discover the tools California ISO uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

California ISO Email Formats and Examples

California ISO primarily utilizes an email format that combines the employee's first initial with their last name, followed by the @caiso.com domain. This is a common structure for official communications.

[first_initial][last]@caiso.com

Format

jdoe@caiso.com

Example

90%

Success rate

News and media

CAISO News ReleasesMay 23, 2024

California ISO issues restricted maintenance operations for May 24-29 due to forecasted high loads and temperatures

The California ISO has issued a Restricted Maintenance Operations (RMO) for May 24 through May 29, 2024, due to forecasted high temperatures and electrical loads across the state. This measure aims to minimize generation and transmission outages to ensure system reliability during the period of increased demand....more

CAISO News ReleasesMay 7, 2024

Mark Rothleder appointed as new chief operating officer for California ISO

The California ISO announced the appointment of Mark Rothleder as its new senior vice president and chief operating officer (COO), effective May 6, 2024. Rothleder, a 25-year veteran of the ISO, previously served as Vice President of Market Policy and Grid Performance....more

CAISO News ReleasesApril 25, 2024

California ISO Board approves 2023-2024 Transmission Plan, advancing reliability and clean energy goals

The CAISO Board of Governors approved the 2023-2024 Transmission Plan, authorizing nearly $6.1 billion in new high-voltage transmission projects. These projects are designed to maintain grid reliability and support California's transition to clean energy by integrating new renewable resources and accommodating future load growth....more

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