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Desmond J. O'Sullivan, Appellate Attorney in Port Jefferson, New York

Over 58 years of legal practice · focused on Appellate, Business, and Estate Planning · 4.4/5 rating from 1 verified client review

MemberatDesmond J. O'Sullivan, P.C.

Port Jefferson, NY

Practicing appellate in Port Jefferson since 1968.

58+
Years practicing
4.4 ★
1 client review
2
Bar admissions

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Quick answer

Desmond J. O'Sullivan is a member based in Port Jefferson, NY. The practice focuses on Appellate, Business, and Estate Planning. Desmond has over 58 years of legal experience. Currently practicing at Desmond J. O'Sullivan, P.C.. Rated 4.4 out of 5 from 1 client review.

Based in
Port Jefferson, NY
Experience
over 58 years
Known for
Appellate · Business · Estate Planning
  • Handles Appellate, Business, and Estate Planning matters from Port Jefferson, NY.
  • Over 58 years of practice as a licensed attorney.
  • Recognized with BV Distinguished.

About Desmond J. O'Sullivan: Desmond J. O'Sullivan is a member based in Port Jefferson, NY. The practice focuses on Appellate, Business, and Estate Planning. Desmond has over 58 years of legal experience. Currently practicing at Desmond J. O'Sullivan, P.C.. Rated 4.4 out of 5 from 1 client review.

Areas of practice

Desmond's practice areas in Port Jefferson

Desmond concentrates on appellate, business, estate planning, general, and government. Each area below outlines the kind of case Desmond handles, typical outcomes to expect, and how the intake process starts.

Appellate cases in Port Jefferson, New York

Desmond takes appellate matters in Port Jefferson, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Desmond agrees to represent you.

Business cases in Port Jefferson, New York

Desmond takes business matters in Port Jefferson, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Desmond agrees to represent you.

Estate Planning cases in Port Jefferson, New York

Desmond takes estate planning matters in Port Jefferson, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Desmond agrees to represent you.

General cases in Port Jefferson, New York

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

Government cases in Port Jefferson, New York

Desmond takes government matters in Port Jefferson, New York. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Desmond agrees to represent you.

Biography

Desmond J. O'Sullivan, appellate attorney serving Port Jefferson

Desmond J. O'Sullivan is a member based in Port Jefferson, NY. The practice focuses on Appellate, Business, and Estate Planning. Desmond has over 58 years of legal experience. Currently practicing at Desmond J. O'Sullivan, P.C.. Rated 4.4 out of 5 from 1 client review. Desmond works from Port Jefferson, New York and takes on appellate matters across the region.

Desmond J. O'Sullivan is a lawyer practicing litigation, real estate, estates and 4 other areas of law. Desmond received a B.S. degree from Fordham University in 1961, and has been licensed for 58 years. Desmond practices at Desmond J. O'Sullivan, P.C. in Port Jefferson, NY.

Desmond's approach to appellate cases

Desmond J. O'Sullivan is a lawyer practicing litigation, real estate, estates and 4 other areas of law. Desmond received a B.S. degree from Fordham University in 1961, and has been licensed for 58 years. Desmond practices at Desmond J. O'Sullivan, P.C. in Port Jefferson, NY.

The kind of cases Desmond takes

Desmond reviews new inquiries case-by-case for appellate, business, and estate planning matters in Port Jefferson and the surrounding New York area.

Credentials

Credentials — where Desmond studied and practices

  • Fordham University

    LL.B. New · 1967

  • Fordham University

    B.S. · 1961

Jurisdictions

Desmond's state bar admissions

  • U.S. Supreme Court a

    1971 · ACTIVE

  • New York

    1968 · ACTIVE

Desmond studied at LL.B. New in Fordham University and B.S. in Fordham University.

Law school and academic background

Desmond completed LL.B. New in Fordham University and B.S. in Fordham University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Desmond runs in New York is where that training gets applied to real client questions.

Recognition

Desmond's legal honors and published work

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

  • BV Distinguished

Legal awards and honors

BV Distinguished.

Affiliations

Desmond's professional memberships and bar associations

  • Suffolk County (Chairman, Federal Courts Committee, 1978, 1979 and 1980) and New York State Bar Associations Nassau-Suffolk Trial Lawyers Association Criminal Bar Association of Suffolk County

    membership

Locations

Desmond J. O'Sullivan's office in Port Jefferson

Desmond's primary office is at 21 Waterview Dr., Port Jefferson, NY, 11777. In-person meetings are by appointment; a phone intake usually comes first.

Main office

Desmond J. O'Sullivan, P.C.

21 Waterview Dr.

Port Jefferson, NY 11777

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Client feedback

Client reviews of Desmond J. O'Sullivan — 4.4/5 rating from 1 verified client review

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

4.4

1 client review

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Desmond J. O'Sullivan claims this profile.

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Hiring guide

How to hire Desmond J. O'Sullivan — what to expect in your first consultation

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

Consultation formats and pricing

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

Questions to ask a appellate attorney in Port Jefferson, New York

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 Desmond

Desmond 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. Desmond confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Desmond'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 Desmond J. O'Sullivan

  • How much does it cost to hire Desmond for a appellate case?

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

  • Does Desmond offer a free consultation?

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

  • How long do appellate cases in New York 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. Desmond gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Desmond take my case if I'm outside Port Jefferson?

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

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

  • Is Desmond accepting new appellate clients right now?

    Desmond'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 Port Jefferson and Albany in New York

Desmond handles appellate matters throughout New York. Each city below is a direct link into the search page for verified appellate attorneys in that community.

More counsel

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