Jonathan Halsby Sinnreich, Environmental Attorney in Central Islip, New York
Over 51 years of legal practice · focused on Environmental, General, and Litigation · 5.0/5 rating from 1 verified client review
Founding PartneratSinnreich, Kosakoff & Messina LLP
Central Islip, NY
Practicing environmental in Central Islip since 1975.
- 51+
- Years practicing
- 5.0 ★
- 1 client review
- 6
- Bar admissions
Practices in
Are you Jonathan Halsby Sinnreich?
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Quick answer
Jonathan Halsby Sinnreich is a founding partner based in Central Islip, NY. The practice focuses on Environmental, General, and Litigation. Jonathan has over 51 years of legal experience. Currently practicing at Sinnreich, Kosakoff & Messina LLP. Rated 5.0 out of 5 from 1 client review.
- Based in
- Central Islip, NY
- Experience
- over 51 years
- Known for
- Environmental · General · Litigation
- Handles Environmental, General, and Litigation matters from Central Islip, NY.
- Over 51 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About Jonathan Halsby Sinnreich: Jonathan Halsby Sinnreich is a founding partner based in Central Islip, NY. The practice focuses on Environmental, General, and Litigation. Jonathan has over 51 years of legal experience. Currently practicing at Sinnreich, Kosakoff & Messina LLP. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Practice areas handled by Jonathan Halsby Sinnreich
Jonathan concentrates on environmental, general, and litigation. Each area below outlines the kind of case Jonathan handles, typical outcomes to expect, and how the intake process starts.
Environmental
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General
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Litigation
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Environmental cases in Central Islip, New York
Jonathan takes environmental matters in Central Islip, 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 Jonathan agrees to represent you.
General cases in Central Islip, New York
Jonathan takes general matters in Central Islip, 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 Jonathan agrees to represent you.
Litigation cases in Central Islip, New York
Jonathan takes litigation matters in Central Islip, 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 Jonathan agrees to represent you.
Biography
About Jonathan Halsby Sinnreich — Over 51 years of New York environmental experience
Jonathan Halsby Sinnreich is a founding partner based in Central Islip, NY. The practice focuses on Environmental, General, and Litigation. Jonathan has over 51 years of legal experience. Currently practicing at Sinnreich, Kosakoff & Messina LLP. Rated 5.0 out of 5 from 1 client review.
Jonathan Halsby Sinnreich is a lawyer practicing environmental and natural resources, litigation, construction and 2 other areas of law. Jonathan received a B.A. degree from St. John's College in 1968, and has been licensed for 51 years. Jonathan practices at Sinnreich, Kosakoff & Messina LLP in Central Islip, NY.
Jonathan's approach to environmental cases
Jonathan Halsby Sinnreich is a lawyer practicing environmental and natural resources, litigation, construction and 2 other areas of law. Jonathan received a B.A. degree from St. John's College in 1968, and has been licensed for 51 years. Jonathan practices at Sinnreich, Kosakoff & Messina LLP in Central Islip, NY.
Clients Jonathan works with
Jonathan reviews new inquiries case-by-case for environmental, general, and litigation matters in Central Islip and the surrounding New York area.
Credentials
Jonathan Halsby Sinnreich's legal education and bar admissions
University of Virginia School of Law
J.D. · 1974
St. John's College
B.A. · 1968
Jurisdictions
Jonathan's state bar admissions
U.S. Claims Court
1986 · ACTIVE
U.S. Tax Court
1982 · ACTIVE
U.S. Court of Appeal
1980 · ACTIVE
U.S. Court of Appeal
1977 · ACTIVE
U.S. District Court,
1975 · ACTIVE
New York
1975 · ACTIVE
Jonathan studied at J.D. in University of Virginia School of Law and B.A. in St. John's College.
Law school and academic background
Jonathan completed J.D. in University of Virginia School of Law and B.A. in St. John's College. Formal legal training is one signal of substantive knowledge — the day-to-day practice Jonathan runs in New York is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of Jonathan Halsby Sinnreich
Jonathan has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Locations
Jonathan Halsby Sinnreich's office in Central Islip
Jonathan's primary office is at 267 Carleton Ave., Ste. 301, Central Islip, NY, 11722. In-person meetings are by appointment; a phone intake usually comes first.
Sinnreich, Kosakoff & Messina LLP
267 Carleton Ave., Ste. 301
Central Islip, NY 11722
Open in Google MapsClient feedback
Client reviews of Jonathan Halsby Sinnreich — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of Jonathan. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing environmental attorneys in Central Islip.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Jonathan Halsby Sinnreich claims this profile.
Read all reviewsHiring guide
How to hire Jonathan Halsby Sinnreich — what to expect in your first consultation
Working with a new environmental attorney should feel structured. Here's how the first two conversations with Jonathan usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Jonathan charges for the initial consult. That fee is credited toward representation if you retain Jonathan'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; Jonathan will tell you what matters and what doesn't.
Questions to ask a environmental attorney in Central Islip, New York
A short list to run through before you commit: How many environmental 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 Jonathan
Jonathan discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in environmental practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every environmental 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. Jonathan confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Jonathan's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many environmental practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Jonathan Halsby Sinnreich
How much does it cost to hire Jonathan for a environmental case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Jonathan walks through the likely range during the consult so there are no surprises.
Does Jonathan offer a free consultation?
Jonathan charges for the initial consult; that fee is credited toward representation if you retain Jonathan's office. Some environmental attorneys offer free consults — check Jonathan's current terms during booking.
How long do environmental cases in New York typically take?
Simple environmental 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. Jonathan gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Jonathan take my case if I'm outside Central Islip?
Jonathan 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 — Jonathan 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 Jonathan?
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. Jonathan will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Jonathan accepting new environmental clients right now?
Jonathan's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Environmental attorneys serving Central Islip and Albany in New York
Jonathan handles environmental matters throughout New York. Each city below is a direct link into the search page for verified environmental attorneys in that community.
More counsel
Other top-rated environmental attorneys in New York
If Jonathan's intake is full or the fit isn't right, these environmental attorneys in Central Islip handle similar matters. Every profile below is verified and open to consultations.