Atty. Denis John Conlon

Atty. Denis John Conlon

Atty. Denis John Conlon is a lawyer practicing tax fraud / tax evasion, appeals, federal tax.

Chicago Chicago 65 yrs experience 65 year
Call (312) 535-4941 Book Appointment

Profile Summary

About Denis John Conlon at a glance

Denis John Conlon is an I.R.S. based in Chicago, Illinois, practicing at Martin, Brown, Sullivan, Roadman & Hartnett, Ltd.. They have 65+ years of legal experience, licensed to practice since 1961. Their practice focuses on tax, white collar, and appellate. Admitted to practice in Illinois (1961), Wisconsin U.S. District Court, Eastern District of Illinois U.S. Tax Court U.S. Court of Federal Cla (1967), and U.S. District Court, Eastern and Western Districts of Wisconsin (1967). Educated at DePaul University (LL.M. Tax, 1985) and Loyola University (B.S.C., 1958). Active member of Chicago and American (Member, Taxation Section) Bar Associations State Bar of Wisconsin. Serands clients in Chicago, IL and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Atty. Denis John Conlon is a lawyer practicing tax fraud / tax evasion, appeals, federal tax
  • Denis received a B.S.C. degree from Loyola University in 1958, and has been licensed for 65 years
  • Denis practices at Martin, Brown, Sullivan, Roadman & Hartnett, Ltd. in Chicago, IL

Practice Areas Explained

Denis John Conlon's Areas of Practice

Each practice area below reflects the types of cases Denis John Conlon handles, with a brief overview of what that area of law covers.

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

Denis John Conlon is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in Illinois →

White Collar Crimes

Denis John Conlon is one of 20,025 white collar attorneys indexed nationally. Browse white collar attorneys in Illinois →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Denis John Conlon is one of 86,319 appellate attorneys indexed nationally. Browse appellate attorneys in Illinois →

Jurisdictional Context

Why local counsel matters in Illinois

Practicing law in Illinois. Legal matters in Illinois are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Chicago are typically filed in the local municipal court or the appropriate Illinois state district court, depending on subject matter and amount in controversy. An attorney licensed in Illinois brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Illinois courts without local counsel or pro hac vice admission.

Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.

Frequently Asked

Common questions about Denis John Conlon

Where is Denis John Conlon's law office located?
Denis John Conlon's law practice is located in Chicago, Illinois. The firm is Martin, Brown, Sullivan, Roadman & Hartnett, Ltd.. You can contact the office directly through this profile page.
What practice areas does Denis John Conlon handle?
Denis John Conlon focuses on tax, white collar, appellate. Each practice area listed reflects experience handling cases of that type in Illinois.
How long has Denis John Conlon practiced law?
Denis John Conlon has 65+ years of legal experience and has been licensed since 1961.
Where did Denis John Conlon go to law school?
Denis John Conlon earned their education at (LL.M. Tax, 1985); (B.S.C., 1958).
How can I contact Denis John Conlon for a consultation?
You can contact Denis John Conlon directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

LL.M. Tax
DePaul University
- 1985
B.S.C.
Loyola University
- 1958

Bar Admissions

Illinois
Admitted: 1961
Wisconsin U.S. District Court, Eastern District of Illinois U.S. Tax Court U.S. Court of Federal Cla
Admitted: 1967
U.S. District Court, Eastern and Western Districts of Wisconsin
Admitted: 1967

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