Atty. Michael Jonathan Sullivan
Michael Jonathan Sullivan is a lawyer practicing litigation & dispute resolution. Michael received a A.B. degree from Duke University in 1990, and has been licensed for 33 years.
Litigation & Dispute Resolution Attorney · Serving Chicago, IL · 33+ Years Experience
Profile Summary
About Michael Jonathan Sullivan at a Glance
Michael Jonathan Sullivan is a Counsel based in Chicago, Illinois, practicing at Mayer Brown Llp. They have 33+ years of legal experience, licensed to practice since 1993. Their practice focuses on litigation. Admitted to practice in US District Court for the Northern District of Illinois (1993), US Court of Appeals for the Seventh Circuit (2000), Illinois (2009), and US District Court for the Northern District Florida (2009). Educated at Harvard Law School (J.D., 1993) and Duke University (A.B., 1990). Serves clients in Chicago, IL and the surrounding metropolitan area.
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About Michael Jonathan Sullivan
- Michael Jonathan Sullivan is a lawyer practicing litigation & dispute resolution
- Michael received a A.B. degree from Duke University in 1990, and has been licensed for 33 years
- Michael practices at Mayer Brown LLP in Chicago, IL
Practice Areas Explained
Michael Jonathan Sullivan's Areas of Legal Practice
Each practice area below reflects the types of cases Michael Jonathan Sullivan handles, with a practical overview of what that area of law involves and how it may apply to your situation in Chicago.
Civil Litigation in Chicago
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Michael Jonathan Sullivan is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in Illinois →
Jurisdictional Context
Why Local Counsel Matters in Chicago
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 venue, 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.
Chicago Courts and Legal Process
Choosing a Chicago-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Illinois attorneys? Browse all attorneys in Chicago or all attorneys in Illinois.
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Professional Profile
Why Clients in Chicago Choose Michael Jonathan Sullivan
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish Michael Jonathan Sullivan's practice in the field of litigation.
Decade-Tested Legal Experience
Michael Jonathan Sullivan brings 33+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in US District Court for the Northern District of Illinois, US Court of Appeals for the Seventh Circuit, and Illinois, Michael Jonathan Sullivan can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Focused Litigation Practice
Concentrating on litigation means Michael Jonathan Sullivan's knowledge of relevant statutes, case law, and procedural nuances stays current — unlike generalist practices that spread attention across unrelated fields.
Local Presence in Chicago
A Chicago-based practice means Michael Jonathan Sullivan attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
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How People Find Michael Jonathan Sullivan Online
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Michael Jonathan Sullivan's Practice Areas & Specializations
Education & Law School Background
Bar Admissions & Licensed Jurisdictions
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