Westamerica Bancorporation announced the retirement of John "Robert" A. Thorson, Senior Vice President and Treasurer, effective January 24, 2025, after more than 35 years of service. John Sousa will succeed him as Senior Vice President and Treasurer, effective January 27, 2025. Mr. Sousa joined the company in July 2024 as Vice President and Assistant Treasurer, bringing over 13 years of experience in investment portfolio management and derivatives execution from his tenure at Bank of the West.
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