Arnstein & Lehr LLP

120 South Riverside Plaza
Suite 1200
Chicago, IL 60606

(312) 876-6927
>>Firm Bio

Robert E. McKenzie is a partner of the law firm of Arnstein & Lehr LLP of Chicago, Illinois, concentrating his practice in representation before the Internal Revenue Service and state agencies.


IRS Audits
IRS Collection
Offers in Compromise
Federal Tax Liens
Notice of Levy
Voluntary Disclosure of Offshore Accounts

State Tax Problems
Seizure of Wages and Bank Accounts
Innocent Spouse
IRS Penalties
U.S. Tax Court

IRS Criminal Investigation
Tax Litigation
Employment Tax Problems
Taxpayer Rights
Estate Planning

Mr. McKenzie has lectured extensively on the subject of taxation. He has presented courses before thousands of CPA’s, attorneys and enrolled agents nationwide. He has made numerous media appearances including Dateline NBC and The ABC Nightly News.

Prior to entering private practice, Mr. McKenzie was employed by the Internal Revenue Service, Collection Division, in Chicago, Illinois. Since entering private practice, he has dedicated a major portion of his time to representation before the IRS.

From 2009 to 2011, Mr. McKenzie was a member of the IRS Advisory Council, which advises IRS management. He was council director of the ABA Tax Section (1998-2001). He was vice chair of the ABA Tax Section (2003-2005). Mr. McKenzie is past chairman of the Employment Tax Committee, past co-chair of the Task Force for Bankruptcy Legislation of the ABA Section on Taxation and past chairman of the Chicago Bar Association Federal Tax Committee. He was dean of the National Tax Practice Institute (1998-2002). Mr. McKenzie serves on Arnstein & Lehr’s Executive Committee.


Mr. McKenzie is an AV-rated attorney listed by Martindale-Hubbell. He is noted as one of The Bar Register of Preeminent Lawyers as well as listed as a “Leading Illinois Attorney” since 1995. Mr. McKenzie has been selected as a Fellow of the American College of Tax Counsel (2001-present) and serves on its Board of Regents. He is also a Fellow of the American Bar Foundation (2001-present). He was a member of the American Bar Association, Tax Section, Council Director (1998-2001). He was co-chair of the Task Force for Bankruptcy Legislation (1997-1998) and served as vice chair of the ABA Tax Section (2003-2005). He also served as chairman for the Employment Taxes Committee (1992-1994). Mr. McKenzie is a member of Executive Committee Chicago Bar Association, Tax Committee (1992-present) and served as chairman (1996-1997). He served as the National Tax Practice Institute dean (1998-2002). He is a life member of the American Tax Policy Institute.  Mr. McKenzie was also a member of the Internal Revenue Service Advisory Council from 2009 to 2011.

Recent Publications

Mr. McKenzie is the author of “Representation Before the Collection Division of the IRS” and coauthor of “Representing the Audited Taxpayer Before the IRS, and Representation Before the U.S. Tax Court.” He has been selected for listing by Law and Leading Attorneys where he serves on its advisory board. He speaks on a regular basis. In the last year, he has spoken for the American Bar Association in; Washington, DC. California Society of Enrolled Agents, Las Vegas, NV; Reno, NV and the American Institute of CPA’s.

Mr. McKenzie is a noted authority and media source on IRS and tax-related issues, and he continues to be featured in national and international news stories. This includes his analysis, which appeared in various publications, regarding the IRS’ 2012 efforts to uncover the identities of U.S. citizens with accounts in banks offshore.


Chicago Kent College of Law, Illinois Institute of Technology

J.D., High Honors
West Hornbook Award (number one student in class)
Silas Strawn Scholarship

Michigan State University

Bar Admissions

State of Illinois
Supreme Court of Illinois
United States District Court for the Northern District of Illinois
Trial Bar of United States District Court for the Northern District of Illinois
United States Court of Appeals for the Seventh Circuit
United States Tax Court
United States Court of Claims
United States Supreme Court

As featured on

ABC News
Washington Post
Forbes Magazine
USA Today
Wall Street Journal
Dateline NBC
IRS tax problems tax lawyer

Former IRS Officer

Robert McKenzie’s wealth of experience representing clients before the Internal Revenue Services comes in part from his time within the IRS. He served in a number of roles in the Collection Division, including: Revenue Officer, Instructor of Revenue Officers, and Advisory Revenue Officer in the Chicago Special Procedures Staff.

NAEA National Association of Enrolled Agents

Former Dean
of the National Tax Practice Institute

AV rated tax attorney

AV rated 5.0
from Martindale-Hubbell

Chicago Bar Association 150x50

Past Chairman
of the Federal Tax Committee

Leading Lawyers

Advisory Board Member
Leading Lawyers

American Bar Association ABA Tax Section Lawyer

American Bar Association
Past Chair of the Employment Tax Committee, Vice-Chair of the Tax Section, Co-Chair of the Bankruptcy Legislation Task Force

ACTC American College of Tax Counsel

Vice President
of the American College of Tax Counsel