Jerome Erwin Marks, ADR Attorney in Philadelphia, Pennsylvania
Over 51 years of legal practice · focused on ADR, Appellate, and Insurance · 5.0/5 rating from 1 verified client review
Senior PartneratMarks, O'Neill, O'Brien & Courtney, P.C.
Philadelphia, PA
Practicing adr in Philadelphia since 1975.
- 51+
- Years practicing
- 5.0 ★
- 1 client review
- 1
- Bar admission
Are you Jerome Erwin Marks?
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Quick answer
Jerome Erwin Marks is a senior partner based in Philadelphia, PA. The practice focuses on ADR, Appellate, and Insurance. Jerome has over 51 years of legal experience. Currently practicing at Marks, O'Neill, O'Brien & Courtney, P.C.. Rated 5.0 out of 5 from 1 client review.
- Based in
- Philadelphia, PA
- Experience
- over 51 years
- Known for
- ADR · Appellate · Insurance
- Handles ADR, Appellate, and Insurance matters from Philadelphia, PA.
- Over 51 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About Jerome Erwin Marks: Jerome Erwin Marks is a senior partner based in Philadelphia, PA. The practice focuses on ADR, Appellate, and Insurance. Jerome has over 51 years of legal experience. Currently practicing at Marks, O'Neill, O'Brien & Courtney, P.C.. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Practice areas handled by Jerome Erwin Marks
Jerome concentrates on adr, appellate, insurance, litigation, and medical malpractice. Each area below outlines the kind of case Jerome handles, typical outcomes to expect, and how the intake process starts.
ADR
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Appellate
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Insurance
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Litigation
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Medical Malpractice
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Personal Injury
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Product Liability
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Slip & Fall
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ADR cases in Philadelphia, Pennsylvania
Jerome 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 Jerome agrees to represent you.
Appellate cases in Philadelphia, Pennsylvania
Jerome takes appellate 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 Jerome agrees to represent you.
Insurance cases in Philadelphia, Pennsylvania
Jerome takes insurance 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 Jerome agrees to represent you.
Litigation cases in Philadelphia, Pennsylvania
Jerome 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 Jerome agrees to represent you.
Medical Malpractice cases in Philadelphia, Pennsylvania
Jerome takes medical malpractice 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 Jerome agrees to represent you.
Biography
About Jerome Erwin Marks — Over 51 years of Pennsylvania adr experience
Jerome Erwin Marks is a senior partner based in Philadelphia, PA. The practice focuses on ADR, Appellate, and Insurance. Jerome has over 51 years of legal experience. Currently practicing at Marks, O'Neill, O'Brien & Courtney, P.C.. Rated 5.0 out of 5 from 1 client review.
Jerome Erwin Marks is a lawyer practicing personal injury, products liability, insurance defense and 5 other areas of law. Jerome received a B.A. degree from Temple University in 1972, and has been licensed for 51 years. Jerome practices at Marks, O'Neill, O'Brien & Courtney, P.C. in Philadelphia, PA and 1 other location.
How Jerome handles adr matters
Jerome Erwin Marks is a lawyer practicing personal injury, products liability, insurance defense and 5 other areas of law. Jerome received a B.A. degree from Temple University in 1972, and has been licensed for 51 years. Jerome practices at Marks, O'Neill, O'Brien & Courtney, P.C. in Philadelphia, PA and 1 other location.
The kind of cases Jerome takes
Jerome reviews new inquiries case-by-case for adr, appellate, and insurance matters in Philadelphia and the surrounding Pennsylvania area.
Credentials
Jerome Erwin Marks's legal education and bar admissions
Duquesne University
J.D. · 1975
Temple University
B.A. · 1972
Jurisdictions
Jerome's state bar admissions
Pennsylvania
1975 · ACTIVE
Jerome studied at J.D. in Duquesne University and B.A. in Temple University.
Law school and academic background
Jerome completed J.D. in Duquesne University and B.A. in Temple University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Jerome runs in Pennsylvania is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of Jerome Erwin Marks
Jerome has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Affiliations
Jerome's professional memberships and bar associations
Philadelphia, Pennsylvania and American Bar Associations Maritime Law Association of the United States Pennsylvania Defense Institute Defense Research and Trial Lawyers Association Philadelphia Association of Defense Counsel
membership
Locations
Jerome Erwin Marks's office in Philadelphia
Jerome's primary office is at 1800 John F. Kennedy Boulevard, Suite 1900, Philadelphia, PA, 19103. In-person meetings are by appointment; a phone intake usually comes first.
Marks, O'Neill, O'Brien & Courtney, P.C.
1800 John F. Kennedy Boulevard, Suite 1900
Philadelphia, PA 19103
Open in Google MapsClient feedback
Client reviews of Jerome Erwin Marks — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of Jerome. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing adr attorneys in Philadelphia.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Jerome Erwin Marks claims this profile.
Read all reviewsHiring guide
How to hire Jerome Erwin Marks — what to expect in your first consultation
Working with a new adr attorney should feel structured. Here's how the first two conversations with Jerome usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Jerome charges for the initial consult. That fee is credited toward representation if you retain Jerome'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; Jerome 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 Jerome
Jerome 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. Jerome confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Jerome'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 Jerome Erwin Marks
How much does it cost to hire Jerome for a adr case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Jerome walks through the likely range during the consult so there are no surprises.
Does Jerome offer a free consultation?
Jerome charges for the initial consult; that fee is credited toward representation if you retain Jerome's office. Some adr attorneys offer free consults — check Jerome'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. Jerome gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Jerome take my case if I'm outside Philadelphia?
Jerome 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 — Jerome 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 Jerome?
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. Jerome will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Jerome accepting new adr clients right now?
Jerome'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
Jerome 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 Jerome'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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