Our Team

Jenny L. Johnson Ware


Jenny Louise Johnson Ware handles complex tax disputes of significant value for clients ranging from individuals to multinational corporations. She represents taxpayers in all stages of criminal and civil tax proceedings, including sensitive audits and examinations, IRS appeals, summons enforcement, search warrants, grand jury subpoenas, negotiated resolutions with the IRS and the Department of Justice, trials in federal district court and the U.S. Tax Court, sentencings and appellate litigation.

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Guinevere M. Moore


Guinevere Marie Moore is a tax litigator who represents taxpayers in civil and criminal tax controversies. She advocates for taxpayers at the IRS examination and appeals levels and, if a settlement with the IRS cannot be reached, in litigation.

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Shay-Ann Heiser Singh

Senior Counsel

Shay-Ann Heiser Singh represents taxpayers in civil and criminal tax controversies before the IRS and in litigation. She was previously a partner in the Chicago office of Kirkland & Ellis, where she handled complex commercial cases at the trial and appellate levels in state and federal court. Those matters included corporate restructurings, employment discrimination matters, and government contract disputes.

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Janice Mueller

Office Manager

Janice Mueller has worked with Jenny Johnson and Guinevere Moore for over ten years. She is the architect of several systems designed to ensure each client need is addressed in a timely manner. She lives in Wheaton, Illinois.

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Elizabeth Yablonicky

Senior Counsel

Liz has over fifteen years of experience in federal and international tax dispute resolution. She advocates for taxpayers facing IRS adjustments at Appeals and in federal courts. She starts by consulting with taxpayers to understand their values, goals, and the facts leading to the dispute with the IRS, then researches and applies the legal support for their tax return positions in protests and court filings.

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