Gasawneh CPA — A Chino Hills CPA Firm

At Gasawneh CPA, we believe the most valuable accounting relationships begin with understanding people.

Behind every financial statement, tax return, and business decision is someone working toward a goal, managing a responsibility, or navigating an important change.

Our purpose is to help clients understand their financial position and make informed decisions with greater confidence.

Decades of Experience. A Commitment to Personal Care

Our team’s professional experience includes more than 30 years in accounting and tax matters.

That experience provides perspective, but we believe its greatest value comes from how it is shared with clients.

Jonathan Gasawneh is a Certified Public Accountant and CERTIFIED FINANCIAL PLANNER™ professional with a Master of Professional Accountancy. His expertise spans taxation, accounting, and financial planning, allowing him to provide comprehensive guidance to individuals and businesses.

As the founder of Gasawneh CPA, Jonathan believes meaningful financial guidance begins with understanding each client’s circumstances and goals. His approach combines proactive planning, personalized strategies, and clear communication to help clients navigate complex financial decisions with confidence.

Credentials: MPAc · CPA ·

With over 30 years of experience in taxation, Zaid Gasawneh brings extensive knowledge and a deeply personal approach to serving individuals, families, and small businesses.

Throughout his career, Zaid has built lasting client relationships through integrity, trust, and practical guidance. His experience and commitment to personalized service continue to help shape the values behind Gasawneh CPA.

Zaid believes that exceptional accounting service goes beyond numbers. It’s about understanding people, helping them overcome challenges, and making a meaningful difference in their financial lives.

Matthew Gasawneh brings professional experience in cybersecurity and information technology to Gasawneh CPA, helping protect sensitive client information while supporting secure and efficient operations.

As Chief Information Officer, Matthew focuses on integrating modern technology that strengthens data security, improves operational accuracy, and enhances the client experience.

His approach reflects a simple principle: technology should do more than improve efficiency. It should safeguard client trust and support the delivery of reliable financial services.

As an Enrolled Agent (EA) at Gasawneh CPA, Thien specializes in tax preparation, compliance, and IRS representation. She works closely with individuals and businesses navigating tax audits, IRS notices, disputes, payment arrangements, and outstanding tax liabilities, helping clients understand their options and move toward practical resolutions.

With a professional background in critical care medicine, Thien brings a unique combination of analytical thinking, meticulous attention to detail, and composure under pressure. Her experience navigating complex, high-stakes situations informs the thoughtful and methodical approach she brings to every client relationship.

At Gasawneh CPA, Thien combines technical expertise with a genuine commitment to client advocacy. She believes that even the most complicated tax challenges deserve clear explanations, personalized attention, and a well-defined path forward.

Whether you’re responding to an IRS notice, addressing unresolved tax matters, or seeking greater confidence in your tax situation, Thien is dedicated to helping you navigate the process with clarity, confidence, and peace of mind.