Thomas Christopher Sullivan

Thomas Christopher Sullivan, ADR Attorney in Philadelphia, Pennsylvania

Over 35 years of legal practice · focused on ADR, General, and Litigation · 5.0/5 rating from 5 verified client reviews

AttorneyatMarks & Sokolov, LLC

Philadelphia, PA

Practicing adr in Philadelphia since 1991.

35+
Years practicing
5.0 ★
5 client reviews
7
Bar admissions

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Quick answer

Thomas Christopher Sullivan is an attorney based in Philadelphia, PA. The practice focuses on ADR, General, and Litigation. Thomas has over 35 years of legal experience. Currently practicing at Marks & Sokolov, LLC. Rated 5.0 out of 5 from 5 client reviews.

Based in
Philadelphia, PA
Experience
over 35 years
Known for
ADR · General · Litigation
  • Handles ADR, General, and Litigation matters from Philadelphia, PA.
  • Over 35 years of practice as a licensed attorney.
  • Recognized with BV Distinguished.

About Thomas Christopher Sullivan: Thomas Christopher Sullivan is an attorney based in Philadelphia, PA. The practice focuses on ADR, General, and Litigation. Thomas has over 35 years of legal experience. Currently practicing at Marks & Sokolov, LLC. Rated 5.0 out of 5 from 5 client reviews.

Areas of practice

Thomas's practice areas in Philadelphia

Thomas concentrates on adr, general, litigation, and maritime. Each area below outlines the kind of case Thomas handles, typical outcomes to expect, and how the intake process starts.

ADR cases in Philadelphia, Pennsylvania

Thomas takes adr matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.

General cases in Philadelphia, Pennsylvania

Thomas takes general matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.

Litigation cases in Philadelphia, Pennsylvania

Thomas takes litigation matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.

Maritime cases in Philadelphia, Pennsylvania

Thomas takes maritime matters in Philadelphia, Pennsylvania. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Thomas agrees to represent you.

Biography

Thomas Christopher Sullivan, adr attorney serving Philadelphia

Thomas Christopher Sullivan is an attorney based in Philadelphia, PA. The practice focuses on ADR, General, and Litigation. Thomas has over 35 years of legal experience. Currently practicing at Marks & Sokolov, LLC. Rated 5.0 out of 5 from 5 client reviews. Thomas works from Philadelphia, Pennsylvania and takes on adr matters across the region.

Thomas Christopher Sullivan is a lawyer practicing general practice, litigation, arbitration and 1 other area of law. Thomas received a B.S. degree from Ohio State University in 1986, and has been licensed for 35 years. Thomas practices at Marks & Sokolov, LLC in Philadelphia, PA.

Thomas's approach to adr cases

Thomas Christopher Sullivan is a lawyer practicing general practice, litigation, arbitration and 1 other area of law. Thomas received a B.S. degree from Ohio State University in 1986, and has been licensed for 35 years. Thomas practices at Marks & Sokolov, LLC in Philadelphia, PA.

Clients Thomas works with

Thomas reviews new inquiries case-by-case for adr, general, and litigation matters in Philadelphia and the surrounding Pennsylvania area.

Credentials

Credentials — where Thomas studied and practices

  • Widener University School of Law

    J.D. · 1991

  • Ohio State University

    B.S. Business · 1986

Jurisdictions

Thomas's state bar admissions

  • New York

    2025 · ACTIVE

  • U.S. District Court,

    2009 · ACTIVE

  • U.S. Court of Appeal

    1997 · ACTIVE

  • U.S. Supreme Court

    1995 · ACTIVE

  • New Jersey

    1992 · ACTIVE

  • Pennsylvania

    1991 · ACTIVE

  • U.S. District Court,

    1991 · ACTIVE

Thomas studied at J.D. in Widener University School of Law and B.S. Business in Ohio State University.

Law school and academic background

Thomas completed J.D. in Widener University School of Law and B.S. Business in Ohio State University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Thomas runs in Pennsylvania is where that training gets applied to real client questions.

Recognition

Thomas's legal honors and published work

Thomas has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

  • BV Distinguished

Legal awards and honors

BV Distinguished.

Affiliations

Thomas's professional memberships and bar associations

  • Philadelphia Bar Association

    membership

  • Academy of Advocacy, Temple University Beasley School of Law, 1999

    bar_fellowship

Locations

Thomas Christopher Sullivan's office in Philadelphia

Thomas's primary office is at 1835 Market Street, 28th Floor, Philadelphia, PA, 19103. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Marks & Sokolov, LLC

1835 Market Street, 28th Floor

Philadelphia, PA 19103

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Client feedback

Client reviews of Thomas Christopher Sullivan — 5.0/5 rating from 5 verified client reviews

Every review below is from a verified client of Thomas. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing adr attorneys in Philadelphia.

5.0

5 client reviews

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Thomas Christopher Sullivan claims this profile.

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Hiring guide

How to hire Thomas Christopher Sullivan — what to expect in your first consultation

Working with a new adr attorney should feel structured. Here's how the first two conversations with Thomas usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

Thomas charges for the initial consult. That fee is credited toward representation if you retain Thomas'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; Thomas will tell you what matters and what doesn't.

Questions to ask a adr attorney in Philadelphia, Pennsylvania

A short list to run through before you commit: How many adr 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 Thomas

Thomas discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in adr practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every adr 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. Thomas confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Thomas's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many adr practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Thomas Christopher Sullivan

  • How much does it cost to hire Thomas for a adr case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Thomas walks through the likely range during the consult so there are no surprises.

  • Does Thomas offer a free consultation?

    Thomas charges for the initial consult; that fee is credited toward representation if you retain Thomas's office. Some adr attorneys offer free consults — check Thomas's current terms during booking.

  • How long do adr cases in Pennsylvania typically take?

    Simple adr 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. Thomas gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Thomas take my case if I'm outside Philadelphia?

    Thomas is licensed in Pennsylvania. Matters governed by Pennsylvania law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Thomas 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 Thomas?

    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. Thomas will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Thomas accepting new adr clients right now?

    Thomas's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Areas served

ADR attorneys serving Philadelphia, Pittsburgh and Harrisburg in Pennsylvania

Thomas handles adr matters throughout Pennsylvania. Each city below is a direct link into the search page for verified adr attorneys in that community.

More counsel

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