About Us




Thomas M Carden EA, JSM

International Tax Director

Thomas is a director at American International Tax Advisers. He is enrolled to practice before the Internal Revenue Service.  He has over 22 years of Tax and Financial Industry experience. He started in 1995 in his fathers CPA firm and progressed to being the international expatriate tax specialists for a surviving remnant of Arthur Anderson. He has a Bachelors in Global Business Management from the University of Phoenix and a Juris Science Masters in International Tax and Financial Service Law, and he is currently working on a Doctoral Degree in International Tax and Financial Services Law at Thomas Jefferson School of Law.

He is resident in Bangkok and happy to assist expats all over Asia.

If you have any questions you may contact him at Thomas@aitaxadvisers.com




Hale Stewart JD, LLM

Tax Planning Director

Hale Stewart is a fifth generation attorney with ten years of experience.  He has a Masters in domestic and international taxation at Thomas Jefferson School of Law (Magna Cum Laude).

His specialites encompasse
  • Domestic Tax Planning
  • International Tax Planning
  • Estate Planning
  • Asset Protection
  • Captive Insurance
  • Business Formation
  • Business Operations and
  • Business Dissolution
  • Business Sales
  • Contracts



Dr Horatius Jackie Williams, MBA, JD, LLM, PhD International Taxation and Business

Philippines and East Asia Director

Dr. Horatius Jackie Williams began his career as a Business Consultant and Engineer. As a young professional he worked for the African Development Bank before obtaining his Master’s degree in Business Administration and his Law degrees. He is an expert in International Taxation, Financial Services and International Investment Law.

The work of Dr. Williams heavily involves international taxation and business Consultation. He has also work on projects involving Trust Management, Cross Border Transactions, Business Negotiations, Business Mergers and Acquisitions, Developing and Managing Educational Programs for Universities, Developing new internet business platforms for international professionals to be visible and to provide their services to client across the world



Susan Yeatts, CFP, ChFC, EA

International Tax Manager

Susan has worked as a financial adviser since 1999 and has been enrolled to practice before the IRS since 2007. She holds an Enrolled Agent license from the U.S. Department of Treasury, is a Chartered Financial Consultant, a Certified Financial Planner practitioner, and a member of the National Association of Enrolled Agents (NAEA).

Susan has co-owned and managed an independent securities broker/dealer since 2002. Her area of focus in her investment firm is on compliance with securities industry rules and regulations. She holds the following FINRA securities licenses: Series 4, Series 7, Series, 24, Series 53, Series 63, and Series 65.

Susan’s tax experience includes complex preparation, negotiating and resolving tax penalties, and representing both individuals and companies during the IRS audit and appeals process.

Susan has a Bachelor of Arts degree from Sweet Briar College in Sweet Briar, VA and has studied both Education and Business Administration at the graduate level.

James Martin

Global Client  Manager

James Martin studied international business at California Polytechnic State University, and has been working throughout Southeast Asia since graduating in 2011. Prior to coming on as Global Client Manager in 2017, James worked in finance for five years, assisting with international pension planning and offshore pension transfers. He also has extensive experience setting up both private and corporate health plans. He now manages new client accounts across Asia and coordinates with our partners around the world.

Phakamart Pholsuwan

Tax and Accounting Manager

Pakamart earned a Bachelor degree in Accounting from Huachiew Chalermprakiet University and a Bacherlor of Law from Thammasart University. She also has a Master Degree in Business Administration from Ashland University, USA, with concentration in Finance, Global Management, and Project Management. She has been working in finance and accounting for more than 10 years.