Your bilingual
& bicultural partner.

International Tax Strategies & Accounting Services with the U.S.
‣ Europe ‣ Latin America

Mastrodomenico CPA

Our firm delivers sophisticated tax, accounting, and advisory services to high-net-worth individuals, families, investors, and closely held businesses with domestic and international interests. As a boutique practice, we provide highly personalized guidance tailored to the unique financial, operational, and estate planning needs of each client.

Our approach is proactive—not transactional. We work closely with clients to develop comprehensive strategies that preserve wealth, optimize tax positions, and support long-term business and family objectives. We understand the complexities surrounding international operations, multigenerational wealth, corporate structuring, and cross-border tax matters, and we provide thoughtful guidance designed to help clients navigate them with confidence.

Clients rely on us for strategic insight related to business structure, fiscal planning, estate and gift tax planning, succession considerations, and ongoing compliance. We combine technical expertise with a hands-on advisory approach to ensure every aspect of a client’s financial landscape is aligned and efficiently managed.

  • Business Structure & Entity Consulting

  • Tax Planning & Strategic Advisory

  • Year-End Tax Assessments & Optimization

  • IRS Representation & Tax Controversy Support

  • Estate & Gift Tax Planning

  • International Tax Consulting

  • Accounting & Bookkeeping

Tax Consulting

We offer comprehensive tax preparation and consulting services designed to help clients understand their obligations, remain compliant, and make informed financial decisions with confidence.

Estate & Gift Tax Planning

We offer estate & gift tax planning designed to help individuals and families efficiently transfer wealth across generations while minimizing estate, gift, and other transfer tax exposure through proactive, tailored strategies.

 International Tax

Whether you are a foreign individual or business operating in the United States, or a U.S.-based taxpayer with international activities, we provide strategic guidance to help you navigate cross-border compliance obligations while maximizing available tax and treaty positions.

Accounting & Bookkeeping

Our team manages the day-to-day accounting and bookkeeping process with accuracy and discretion, ensuring your records are organized, reliable, and fully prepared for tax reporting and strategic planning.

IRS Representation

If you receive correspondence from the IRS or a taxing authority, contact us first. We have extensive experience representing clients in examinations, negotiations, and tax controversy matters, providing practical guidance and advocacy throughout the process.

About Mastrodomenico CPA

Specializing in international tax issues, this specialized team combines their knowledge of U.S. and foreign fiscal policies to help clients’ coordinate, maintain, and execute their U.S. tax and estate planning strategies.

Owner Melissa Mastrodomenico, CPA, a San Antonio native and dual Mexican American citizen, prides herself on being bilingual and bicultural. Learning how to navigate and create fiscal strategies can be complicated and intimidating, and her team of experts strives to educate their clients on making decisions best suited for their businesses.

  • OWNER, CPA

    Bio coming soon. We're putting the finishing touches on this profile and look forward to sharing more soon.

  • CPA

    Ari Berlin, CPA, brings more than 20 years of public accounting and tax planning experience serving high-net-worth individuals, families, closely held businesses, private foundations, and nonprofit organizations. He began his public accounting career in 2003 and obtained his CPA license in 2006. Ari has been practicing in San Antonio since 2009 and joined Mastrodomenico CPA PC in March 2025.

    Ari advises clients on complex federal and state income tax matters, estate and gift tax planning, trust and estate taxation, and strategic tax planning for closely held and multi-generational family businesses. He also has extensive experience advising tax-exempt organizations, including private foundations and supporting organizations. In addition, Ari represents clients in tax controversy matters, including IRS and state tax authority correspondence, audit representation, and resolution of complex tax notices and examinations.

    Prior to joining Mastrodomenico CPA PC, Ari spent over a decade with a large international accounting firm in San Antonio, where he led private client service group and all the nonprofit tax engagements for a broad range of clients throughout Texas and the Southwest.

    Ari graduated Cum Laude from the University of Nevada, Las Vegas with a Bachelor of Science in Business Administration. He is a member of the Texas Society of Certified Public Accountants and the American Institute of Certified Public Accountants.

 

  • “Melissa has been an excellent CPA advisor and through her expert and no “BS” professional advice, I’m now achieving all my financial dreams in a horrible market!”

    Micah Johnson // Owner, Precise Vascular Sonography

  • "You need a person who understands your business situation and advises you. That is why Melissa is my accountant."

    Wallace Harding // President

  • "El excelente servicio al cliente y la claridad de su forma de trabajar aseguran que queramos seguir reforzando nuestra relación con ellos."

    Uriel Fernandez // Owner/President, Worldwide MOS, Inc, Worldwide MOS S.A. de C.V.