John McWilliams


Mr. McWilliams is a very experienced and skilled tax attorney and CPA with a Master’s in Tax Law.  He is currently of counsel to Wilson Tax Law Group, APLC and represents clients in tax litigation, complex collection matters, corporate and partnership tax, mergers and acquisitions, and estate planning, including the tax implications and ramifications for business and real estate transactions, structuring and tax strategies for corporations, including s-corporations, private entities, partnerships and LLCs.   In addition to working of counsel at Wilson Tax Law, Mr. McWilliams lectures in the areas of federal tax law and accounting as an adjunct professor at California Southern University School of Law (Costa Mesa) and California State University Fullerton.

Mr. McWilliams previously worked as a tax attorney for another prestigious law firm, and as a Corporate Tax Attorney in the M&A Tax Services Departments of Ernst & Young, LLP and KPMG, LLP.  While practicing as a Certified Public Accountant he worked in the consulting division of Deloitte, LLP and as Finance Manager for Alta Vista Yahoo and as a Senior Audit Manager for PricewaterhouseCoopers, LLP.

Mr. McWilliams represents clients before IRS and State Offer Specialists, IRS Revenue Officers, Revenue Agents, Collection Group Managers,  Appeals and Settlement Officers, as well as Taxpayer Advocates from Internal Revenue Service field offices throughout the United States.

Professional Memberships

Attorney Member – American Bar Association and ABA Tax Law Section, California Tax Bar Section, Orange County Bar Association

Member – ACG, Association for Corporate Growth; King County Bar Association, WA

CPA Member – California Society of CPAs, AICPA, SEC Institute, American Management Association

Tax Committee Member – California Society of CPA’s

Community Activities

Adjunct Professor – California Southern School of Law: Federal Income and Corporate Taxation; Corporate Law; Estate Planning

Adjunct Professor – California State University Fullerton:  Federal Tax and Accounting Overview; Business Entity Taxation

Student Mentor/Volunteer/Pro Bono – Junior College & Associate Programs in Accounting and Finance Courses and Career Counseling Services.

Guest Lecturer – Occasional speaker and presenter on tax and legal topics.

Volunteer – California State Bar Student Tutor


LL.M. (Tax) Loyola Law School, Los Angeles, California

J.D.  Southwestern University School of Law, Los Angeles

B.S. Accounting/Finance Ohio State University, Columbus, OH

Bar Admittance

Supreme Court of the State of California (and all lower courts)

Supreme Court of the State of Washington (and all lower courts)


Certified Public Accountant

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