Don Ryu, CPA, MBA, MPA

Managing Director

Managing Director at RRBB Advisors, LLC

Don is an esteemed tax professional with an impressive track record spanning over three decades. With his extensive expertise in federal, state, and inbound international tax matters, he caters to businesses of all sizes and individual owners. Throughout his career, Don has cultivated a profound understanding of domestic and international tax and accounting issues. Leveraging his expertise across the public and private sectors, he effectively serves a wide range of companies. These diverse industries include biopharma, technology, manufacturing, distribution, construction, and real estate.

People-Focused Approach in Corporate and Partnership Taxation

Don’s primary focus lies in corporate and partnership taxation, where he offers invaluable insights and guidance to clients. His exceptional track record showcases his ability to provide technical assistance, conduct thorough research, and deliver accurate and comprehensive tax solutions. Because Don understands the day-to-day operations of foreign inbound companies, he can assist foreign inbound clients with investment feasibility analysis, entity selection and restructuring, and permanent establishment consulting.

Furthermore, Don has played a pivotal role in driving the growth and development of tax practices within large international firms, specializing in serving foreign-owned manufacturing companies. Don’s dedication extends to assisting inbound international companies as they navigate the challenges of establishing a presence in the United States.

Trust is paramount to Don, and he strives to uphold his commitments and promises. His clients and colleagues rely on him for accurate and reliable advice. Don places great value in the trust bestowed upon him and works diligently to earn and maintain it.

Passionate about Education and Mentorship

In addition to his professional achievements, Don is deeply committed to sharing his experiences and nurturing the growth of others. Don’s passion for teaching shines through as he consistently generates and shares valuable information based on his extensive experiences and insights.

Throughout his career, Don has demonstrated a passion for mentoring and developing others, fostering an environment where individuals can thrive and assume leadership roles. By sharing his knowledge and experiences, he helps aspiring professionals excel in their careers. Therefore, Don has been an Adjunct Professor in the Accountancy Department at Baruch College, City University of New York, for the past six years. There, he imparts his knowledge through courses like Federal Taxation – Theory and Practice and Taxation of Business Entities.

As a recognized expert in the field, Don is a sought-after speaker on various topics, including accounting, tax, and current business and economic issues. His passion for staying up-to-date on industry trends and sharing his knowledge reinforces his commitment to providing valuable insights to clients and peers alike. With his children now independent, Don dedicates his spare time to learning about history and exploring different countries.


  • Certified Public Accountant, State of New York
  • Certified Public Accountant, State of Washington


  • Bachelor of Business Administration, Yonsei University
  • Master in Business Administration in Finance, Yonsei University
  • Master in Professional Accounting, The University of Texas at Austin

Professional Memberships

  • American Institute of Certified Public Accountants (AICPA)
  • Korea Chamber of Commerce
  • Korea Trade-Investment Promotion Agency in New York
  • Korean Innovative Technology Engineers & Entrepreneurs Board of Directors
  • Chodae Community Church Board of Directors


"RRBB" is the brand name under which Rosenberg Rich Baker Berman, P.A. and RRBB Advisors, LLC, and its subsidiary entities, including CFO Financial Partners LLC, provide professional services. Rosenberg Rich Baker Berman, P.A. and RRBB Advisors, LLC (and its subsidiary entities) practice as an alternative practice structure in accordance with the AICPA Code of Professional Conduct and applicable laws, regulations, and professional standards. Rosenberg Rich Baker Berman, P.A. is a licensed independent CPA firm that provides attest services to its clients, and RRBB Advisors, LLC, and its subsidiary entities provide tax and business consulting services to their clients. RRBB Advisors, LLC, and its subsidiary entities are not licensed CPA firms.