Skip Navigation or Skip to Content

Guy Nicio, CPA, MST

Partner, Tax

Guy has more than 25 years of public accounting experience. He is a partner in the firm’s Tax department and has supported Windes and its clients in many capacities since 1998. Guy is currently on the Windes Board of Directors, serves as the Long Beach Office Lead, and manages the firm’s growing Philippines team. He served as the firm’s Partner-in-Charge of the Tax Department from 2020 through early 2024. Guy focuses on delivering high value to his clients by thoroughly understanding all aspects of their business and personal finances and working closely with them to address their unique tax planning, compliance, and consulting needs.

Guy’s well-rounded experience in serving clients across various areas—including tax, accounting, payroll, sales and use tax, and advisory services—combined with his past leadership roles in multiple departments and on the board of directors provides him with a vast array of professional expertise. His proactive, client-centered philosophy ensures tailored tax strategies that are aligned with the individual goals of both business and high-net-worth clients, fostering strong relationships and delivering measurable value.

Guy has developed high-value tax and consulting services tailored to meet the evolving needs of start-up to middle-market businesses. He was instrumental in building the firm’s Client Accounting Services (CAS) group from the ground up, introducing a range of services from fractional CFO and Controller services to litigation support and business management. He also demonstrated exemplary leadership in his response to the pandemic, where he spearheaded the advisory services for the Employee Retention Credit (ERC) and Paycheck Protection Program (PPP). His ability to navigate through legislative changes and lead his team in offering critical support to clients has reinforced Windes’ position as a leader in tax advisory services.

In 2022, the Los Angeles Business Journal named Guy one of the region’s Top 100 Accountants.


Bachelor of Science, Accounting
The University of Phoenix

Master of Science, Taxation
Golden Gate University


Professional Affiliations

  • American Institute of Certified Public Accountants, Member
  • California Society of Certified Public Accountants, Member

Community Affiliations

  • Bruin Professionals, Long Beach Chapter, Moderator and Host
Payments OnlineTaxCaddy
Secure File TransferWindes Portal