Atty. Peter D. Sullivan
Peter Sullivan practices in trial and litigation of complex professional liability and commercial litigation cases, including actions against accountants and attorneys, director and officer liability and coverage cases, consumer class action cases and breach of contract cases. Mr.
Commercial Litigation Attorney · Serving Chicago, IL
Profile Summary
About Peter D. Sullivan at a Glance
Peter D. Sullivan is a business and litigation attorney based in Chicago, Illinois, practicing at Hinshaw & Culbertson LLP. Educated at Loyola University Chicago (J.D., 1983) and University of Notre Dame (BA, 1980). Recognitions include Best Lawyers in America — Commercial Litigation (2026), Best Lawyers in America — Additional Areas of Practice: (2026), and Best Lawyers in America — Legal Malpractice Law - Defendants (2026). Serves clients in Chicago, IL and the surrounding metropolitan area.
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About Peter D. Sullivan
- Peter Sullivan practices in trial and litigation of complex professional liability and commercial litigation cases, including actions against accountants and attorneys, director and officer liability and coverage cases, consumer class action cases and breach of contract cases
- Mr. Sullivan also focuses on lender liability suits, real estate litigation, UCC litigation, state and federal securities law claims, RICO claims, business tort litigation and common law fraud actions
Practice Areas Explained
Peter D. Sullivan's Areas of Legal Practice
Each practice area below reflects the types of cases Peter D. Sullivan handles, with a practical overview of what that area of law involves and how it may apply to your situation in Chicago.
Business & Corporate Law in Chicago
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Peter D. Sullivan is one of 497,491 business attorneys indexed nationally. Browse business attorneys in Illinois →
Civil Litigation in Chicago
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
Peter D. 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 Peter D. 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 Peter D. Sullivan's practice in the field of business and litigation.
Broad Practice Area Coverage
Covering business and litigation, Peter D. Sullivan can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Chicago
A Chicago-based practice means Peter D. Sullivan attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues Peter D. Sullivan Handles in Chicago
Below is a representative sample of the types of matters Peter D. Sullivan has experience with under Illinois law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact Peter D. Sullivan directly to discuss the specifics of your situation.
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How People Find Peter D. Sullivan Online
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Peter D. Sullivan's Practice Areas & Specializations
Education & Law School Background
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