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Saturday, Jul 4, 2026

OC500 2025: SEAN MCCLOSKEY 

SEAN MCCLOSKEY 

CEO 

TAX & FINANCIAL GROUP 

WHY: Leads 100+ employee firm that his father, Dick, began in 1970; at least five key tenured associates have children or siblings serving in important roles in the company. 

NOTABLE: Won a Business Journal 2022 Family Business Award. Began his career at Ernst & Young in LA and then went onto Lehman Brothers, Smith Barney, ING Barings and CB Health Ventures.  

 

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