JC

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

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Quick answer

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 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.

Main office

Dentons US LLP

Sears Tower, Suite 7800, 233 S. Wacker Drive

Chicago, IL 60606-6459

Open in Google Maps

Client feedback

Client reviews of John Claiborne Koski

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Hiring 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.

More counsel

If John's intake is full or the fit isn't right, these appellate attorneys in Chicago handle similar matters. Every profile below is verified and open to consultations.