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Regional market offerings are governed by a five member body with energy industry or regulatory expertise, and are financially independent from market participants

Governing Body

The Western Energy Imbalance Market (WEIM) is governed by a five member body with shared authority from the ISO Board of Governors on rules specific to participation to the WEIM and the Extended Day-Ahead Market that is set to launch in 2026. 

Designed by regional stakeholders, the governing body is nominated by a committee of western stakeholders. These members bring a high level of professionalism and leadership, with work experience in public power, investor-owned utilities, and as state regulators.

Members

Governing Body roster



Chair


Vice Chair



WEM Governing Body market expert


Learn more about the role

Foundational and policy documents

Learn more about the WEM Charter, Governing Body Selection Policy and guidance for handling policy initiatives.

Upcoming events

View full calendar

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Public comments may be provided to the ISO Board of Governors and/or the WEM Governing Body both orally during noticed meetings, and in writing. Oral comments for matters not on the agenda are addressed at the beginning of meetings, while those on agenda items are addressed when the item is presented. Written comments are publicly posted and should be sent at least one week prior to meetings to allow enough time for review by the Board and/or the Governing Body. Comment letters should be sent to sbernard@caiso.com and kosborne@caiso.com.

Market expert opinions and briefings

Title Topic Posted
WEM Governing Body Market Expert Opinion on Extended Day-Ahead Market Congestion Revenue Allocation Final Proposal - Jun 18, 2025 Extended day-ahead market congestion revenue allocation 06/16/2025, 5:29 PM
Initial Brief - WEM Governing Body Market Expert Opinon on Extended Day-Ahead Market Congestion Revenue Allocation - Jun 18, 2025 Extended day-ahead market congestion revenue allocation 06/13/2025, 11:47 AM
Briefing on Parallel Flow Implications for Physical and Financial Transmission Rights - Presentation - Apr 08, 2025 Parallel flow implications for physical and financial transmission rights 04/04/2025, 2:59 PM
WEM Governing Body Market Expert Opinion on Storage Bid Cost Recovery Enhancements - Presentation - Nov 2024 Storage bid cost recovery enhancements 11/04/2024, 9:20 AM
WEIM Market Expert Opinion on Rules for Bidding Above the Soft Offer Cap (Price Formation Enhancements) - Presentation - May 2024 Price formation enhancements 05/14/2024, 1:03 PM
Briefing by WEM Governing Body Market Expert on Fast-Start Pricing - Presentation - Mar 2024 Price formation enhancements 03/12/2024, 3:20 PM
WEIM Governing Body Market Expert's Opinion on Day-Ahead Market Enhancements - Updated Presentation - May 2023 Day-ahead market enhancements 05/15/2023, 2:50 PM
WEIM Governing Body Market Expert's Opinion on Day-Ahead Market Enhancements - Updated Memo - May 2023 Day-ahead market enhancements 05/15/2023, 2:50 PM
WEIM Governing Body Market Expert - Transmission Service and Market Scheduling Priorities Phase2 - Opinion - Jan 2023 Transmission service and market scheduling priorities 01/27/2023, 10:10 AM
WEIM Governing Body Market Expert - Extended Day-Ahead Market - Opinion - Jan 2023 WEIM extended day-ahead market design 01/27/2023, 10:10 AM
Briefing by WEIM Governing Body Market Expert on Resource Sufficiency Evaluation Enhancements Phase 2 - Presentation - Dec 2022 (original version) WEIM resource sufficiency evaluation enhancements phase 2 12/13/2022, 11:48 AM
Briefing by WEIM Governing Body Market Expert on Resource Sufficiency Evaluation Enhancements Phase 2 - Presentation - Dec 2022 (updated clean) WEIM resource sufficiency evaluation enhancements phase 2 12/12/2022, 4:11 PM
Briefing by WEIM Governing Body Market Expert on Resource Sufficiency Evaluation Enhancements Phase 2 - Presentation - Dec 2022 (updated redline) WEIM resource sufficiency evaluation enhancements phase 2 12/12/2022, 4:11 PM
WEIM Governing Body Market Expert Opinion - WEIM Resource Sufficiency Evaluation Enhancements Phase 2 Final Proposal WEIM resource sufficiency evaluation enhancements phase 2 11/14/2022, 10:49 AM
No results
View all market opinions and briefings documents

WEM meeting calendar

ISO Board of Governors, WEM Governing Body and Committees meeting schedule

Contact

For information on or assistance with the Governing Body, please contact:

Kristina Osborne

kosborne@caiso.com

Holly Taylor

htaylor@caiso.com

Meeting documents (last 12 months)

All meeting documents
10/28/2025
1:00 PM - 4:00 PM
In-person Online

WEM Governing Body General Session

Related documents

09/09/2025
1:00 PM - 3:00 PM
Online

WEM Governing Body General Session

Related documents

09/09/2025
9:15 AM - 12:30 PM
Online

WEM Governing Body Executive Session

Related documents

07/22/2025
1:00 PM - 4:30 PM
Online

WEM Governing Body General Session

Related documents

07/22/2025
9:00 AM - 12:15 PM
Online

WEM Governing Body Executive Session

Related documents

06/18/2025
1:00 PM - 3:30 PM
In-person Online

WEM Governing Body General Session

Related documents

06/18/2025
8:30 AM - 12:00 PM
In-person Online

WEM Governing Body Executive Session

No documents associated with this event.

05/20/2025
1:00 PM - 3:15 PM
In-person Online

WEM Governing Body General Session

Related documents

05/20/2025
9:00 AM - 12:15 PM
In-person Online

WEM Governing Body Executive Session

No documents associated with this event.

04/08/2025
10:00 AM - 12:00 PM
Online

WEM Governing Body General Session

Related documents

03/25/2025
1:30 PM - 4:15 PM
Online

WEM Governing Body General Session

Related documents

03/25/2025
9:00 AM - 12:45 PM
Online

WEM Governing Body Executive Session

Related documents

02/11/2025
2:00 PM - 4:00 PM
In-person Online

WEM Governing Body General Session

Related documents

02/11/2025
9:30 AM - 12:45 PM
Online

WEM Governing Body Executive Session

No documents associated with this event.

12/17/2024
9:30 AM - 12:45 PM
Online

WEM Governing Body Executive Session

No documents associated with this event.