Mary Slonina


Contact Details



Mary I. Slonina is a Director in PwC’s Tax Controversy and Regulatory Services practice. She assists clients in addressing federal procedural and administrative tax issues and represents clients in interactions with IRS examination and collection functions, the IRS Office of Appeals, and the IRS Office of Chief Counsel.

Prior to joining PwC in 2011, Ms. Slonina was a senior attorney in the office of Associate Chief Counsel (Procedure & Administration) of the IRS.  During her tenure at Chief Counsel, Ms. Slonina worked in the areas of IRS administrative practice and judicial procedure, particularly focusing on the topics of federal evidentiary rules, federal civil procedure rules, and IRS collection policy and enforcement.  She also represented the Commissioner of the IRS before the United States Tax Court in a variety of Small Business/Self-Employed cases.   

Ms. Slonina received a Juris Doctorate from Case Western Reserve University School of Law and Bachelor of Arts in government from the College of William & Mary.  

She is a member of the Virginia State Bar and the United States Tax Court Bar.  

Ms. Slonina is member of the Tax Section of the American Bar Association; she currently serves as the Chair of the Administrative Practice Committee of the Section.  She is a non-CPA member of the American Institute of CPAs; she currently serves as a committee member of the IRS Advocacy and Relations Committee of the AICPA.  Ms. Slonina is also active in the Federal Bar Association Section of Taxation. 



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