John Claiborne Koski, Appellate Attorney in Chicago, Illinois
Over 34 years of legal practice · focused on Appellate, Class Action, and General
PartneratDentons US LLP
Chicago, IL
Practicing appellate in Chicago since 1992.
- 34+
- Years practicing
- 9
- Bar admissions
Practices in
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John Claiborne Koski is a partner based in Chicago, IL. The practice focuses on Appellate, Class Action, and General. John has over 34 years of legal experience. Currently practicing at Dentons US LLP.
- Based in
- Chicago, IL
- Experience
- over 34 years
- Known for
- Appellate · Class Action · General
- Handles Appellate, Class Action, and General matters from Chicago, IL.
- Over 34 years of practice as a licensed attorney.
About John Claiborne Koski: John Claiborne Koski is a partner based in Chicago, IL. The practice focuses on Appellate, Class Action, and General. John has over 34 years of legal experience. Currently practicing at Dentons US LLP.
Areas of practice
Legal matters John takes on
John concentrates on appellate, class action, general, ip, and litigation. Each area below outlines the kind of case John handles, typical outcomes to expect, and how the intake process starts.
Appellate
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Class Action
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General
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IP
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Litigation
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Appellate cases in Chicago, Illinois
John takes appellate matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
Class Action cases in Chicago, Illinois
John takes class action matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
General cases in Chicago, Illinois
John takes general matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
IP cases in Chicago, Illinois
John takes ip matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
Litigation cases in Chicago, Illinois
John takes litigation matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
Biography
Meet John Claiborne Koski — appellate lawyer in Chicago
John Claiborne Koski is a partner based in Chicago, IL. The practice focuses on Appellate, Class Action, and General. John has over 34 years of legal experience. Currently practicing at Dentons US LLP.
John Claiborne Koski is a lawyer practicing litigation, appeals, antitrust & trade law and 2 other areas of law. John received a B.A. degree from Vanderbilt University in 1989, and has been licensed for 34 years. John practices at Dentons US LLP in Chicago, IL.
Working with John on a appellate matter
John Claiborne Koski is a lawyer practicing litigation, appeals, antitrust & trade law and 2 other areas of law. John received a B.A. degree from Vanderbilt University in 1989, and has been licensed for 34 years. John practices at Dentons US LLP in Chicago, IL.
Clients John works with
John reviews new inquiries case-by-case for appellate, class action, and general matters in Chicago and the surrounding Illinois area.
Credentials
Education, bar admissions, and languages
University of Miami
J.D. · 1992
Vanderbilt University
B.A. · 1989
Jurisdictions
John's state bar admissions
U.S. District Court,
2000 · ACTIVE
U.S. Court of Appeal
1999 · ACTIVE
U.S. District Court,
1997 · ACTIVE
U.S. Supreme Court
1996 · ACTIVE
U.S. Court of Appeal
1995 · ACTIVE
U.S. Court of Appeal
1994 · ACTIVE
Florida
1993 · ACTIVE
Illinois
1992 · ACTIVE
U.S. District Court,
1992 · ACTIVE
John studied at J.D. in University of Miami and B.A. in Vanderbilt University.
Law school and academic background
John completed J.D. in University of Miami and B.A. in Vanderbilt University. Formal legal training is one signal of substantive knowledge — the day-to-day practice John runs in Illinois is where that training gets applied to real client questions.
Affiliations
John's professional memberships and bar associations
Illinois State and American Bar Associations The Florida Bar
membership
Locations
John Claiborne Koski's office in Chicago
John's primary office is at Sears Tower, Suite 7800, 233 S. Wacker Drive, Chicago, IL, 60606-6459. In-person meetings are by appointment; a phone intake usually comes first.
Dentons US LLP
Sears Tower, Suite 7800, 233 S. Wacker Drive
Chicago, IL 60606-6459
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Schedule your consultationHiring guide
How to hire John Claiborne Koski — what to expect in your first consultation
Working with a new appellate attorney should feel structured. Here's how the first two conversations with John usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
John charges for the initial consult. That fee is credited toward representation if you retain John's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; John will tell you what matters and what doesn't.
Questions to ask a appellate attorney in Chicago, Illinois
A short list to run through before you commit: How many appellate matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for John
John discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in appellate practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every appellate matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. John confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
John's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many appellate practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about John Claiborne Koski
How much does it cost to hire John for a appellate case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. John walks through the likely range during the consult so there are no surprises.
Does John offer a free consultation?
John charges for the initial consult; that fee is credited toward representation if you retain John's office. Some appellate attorneys offer free consults — check John's current terms during booking.
How long do appellate cases in Illinois typically take?
Simple appellate matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. John gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can John take my case if I'm outside Chicago?
John is licensed in Illinois. Matters governed by Illinois law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — John will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with John?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. John will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is John accepting new appellate clients right now?
John's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Appellate attorneys serving Chicago, Springfield and Northbrook in Illinois
John handles appellate matters throughout Illinois. Each city below is a direct link into the search page for verified appellate attorneys in that community.
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