
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
Practices in
Are you Thomas Christopher Sullivan?
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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
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General
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Litigation
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Maritime
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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.
Marks & Sokolov, LLC
1835 Market Street, 28th Floor
Philadelphia, PA 19103
Open in Google MapsClient 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.
Read all reviewsHiring 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
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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.

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