California Water Service Group (CWT) adds new operations and regulatory vice presidents
Rhea-AI Filing Summary
California Water Service Group announced leadership changes, promoting Tamara S. Johnson to Vice President, California Operations and Gregory D. Shimansky to Vice President, Rates and Regulatory Affairs, effective July 1, 2026. The Board of Directors unanimously approved the promotions.
Johnson moves up from Director of Field Operations for the Southern California Region and brings 40 years of public water utility experience, all with the company and its largest subsidiary. Shimansky, who joined the Group in 2024, will succeed retiring executive Greg A. Milleman after a decade at the company and will focus on rates and regulatory affairs, supporting efforts to balance affordable customer rates with needed infrastructure investment.
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8-K Event Classification
Key Figures
Key Terms
Vice President, California Operations financial
Vice President, Rates and Regulatory Affairs financial
regulated utilities financial
General Rate Case Program Manager financial
water and wastewater service financial
FAQ
What did California Water Service Group (CWT) announce in this 8-K filing?
Who is Tamara S. Johnson and what is her new role at CWT?
What position will Gregory D. Shimansky hold at California Water Service Group (CWT)?
What is notable about the new Vice President, California Operations role at CWT?
How large is California Water Service Group’s customer base according to this filing?
Which subsidiaries does California Water Service Group (CWT) oversee?
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM
Current Report Pursuant to Section 13
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| Item 7.01. | Regulation FD Disclosure |
On May 20, 2026, California Water Service Group (Group) issued a press release (a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference) announcing the promotion of Tamara S. Johnson to Vice President, California Operations and Gregory D. Shimansky to Vice President, Rates and Regulatory Affairs effective July 1, 2026.
| Item 9.01. | Financial Statements and Exhibits. |
We hereby file the following exhibit with this report:
| Exhibit No. | Description | |
| 99.1 | Press Release issued May 20, 2026 | |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
| CALIFORNIA WATER SERVICE GROUP | ||
| Date: May 20, 2026 | By: | /s/ Martin A. Kropelnicki |
| Name: | Martin A. Kropelnicki | |
| Title: | Chairman, President and Chief Executive Officer | |
Exhibit 99.1
DATE: May 20, 2026
CONTACT: Shannon Dean, (408) 367-8243
For Immediate Release
California Water Service Group Promotes Tamara S. Johnson to
Vice President, California Operations and Gregory D. Shimansky to
Vice President, Rates and Regulatory Affairs.
SAN JOSE, Calif., May 20, 2026 - At its meeting today, the California Water Service Group (CWT: NYSE) Board of Directors unanimously approved the promotions of Tamara S. Johnson to Vice President, California Operations, and Gregory D. Shimansky to Vice President, Rates and Regulatory Affairs, effective July 1, 2026.
Prior to joining the executive team, Johnson served as Director of Field Operations, Southern California Region. She brings 40 years of public water utility experience to the position, having started her career at California Water Service, Group's largest subsidiary, in 1985. Johnson holds a Master of Business Administration from California State University, Monterey Bay, a Bachelor of Science in Business Administration from the University of La Verne, as well as a Water Treatment Operator License Grade 3 and a Water Distribution License Grade 5 from the State of California. The Vice President, California Operations role is newly created.
"This new position reflects our company's growth and the increasing complexity of water utility operations. Tammy is not only a water utility operations expert, she's also an accomplished professional with a track record of getting things done. It's truly a pleasure to welcome to the officer team someone who has dedicated her entire career to the company," said Chairman and Chief Executive Officer Martin A. Kropelnicki.
Shimansky joined California Water Service Group in 2024 as a director focused on rates and regulatory affairs outside of California. Before joining the Group, he served as Rates and Regulatory Affairs Director at Indiana American Water and General Rate Case Program Manager at San Diego Gas and Electric. He holds a Master of Science in Management from Purdue University and a Bachelor of Arts in Economics from the University of California, Los Angeles. He succeeds Greg A. Milleman, who is retiring after a distinguished 10-year career at Group.
"Greg is results-oriented, and he has done a tremendous job for us thus far. I believe he will be a real asset to the Company as we continue to pursue regulatory mechanisms and rate designs that help keep our rates affordable for customers while allowing us to make the investments in water system infrastructure that help keep our water service safe and reliable," Kropelnicki said.
About California Water Service Group
Group is the parent company of regulated utilities California Water Service, Hawaii Water Service, New Mexico Water Service, and Washington Water Service, as well as Texas Water Service, a utility holding company. Together, these companies provide regulated and non-regulated water and wastewater service to more than 2.1 million people in California, Hawaii, New Mexico, Washington, and Texas. Group’s common stock trades on the New York Stock Exchange under the symbol “CWT.” Additional information is available online at www.calwatergroup.com.
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