Mary S. Johnson, Environmental Attorney in Mandeville, Louisiana
focused on Environmental, Insurance, and Litigation
Mandeville, LA
Trusted environmental attorney serving Mandeville.
- 1
- Bar admission
Are you Mary S. Johnson?
This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.
Quick answer
Mary S. Johnson is an attorney based in Mandeville, LOUISIANA. The practice focuses on Environmental, Insurance, and Litigation. Currently practicing at Johnson Gray McNamara LLC.
- Based in
- Mandeville, LOUISIANA
- Experience
- attorney
- Known for
- Environmental · Insurance · Litigation
- Handles Environmental, Insurance, and Litigation matters from Mandeville, LOUISIANA.
- Recognized with Lawyer of the Year — Mass Tort Litigation / Class Actions - Defendants (New Orleans) (2022).
About Mary S. Johnson: Mary S. Johnson is an attorney based in Mandeville, LOUISIANA. The practice focuses on Environmental, Insurance, and Litigation. Currently practicing at Johnson Gray McNamara LLC.
Areas of practice
Mary's practice areas in Mandeville
Mary concentrates on environmental, insurance, litigation, personal injury, and product liability. Each area below outlines the kind of case Mary handles, typical outcomes to expect, and how the intake process starts.
Environmental
View other Environmental attorneys
Insurance
View other Insurance attorneys
Litigation
View other Litigation attorneys
Personal Injury
View other Personal Injury attorneys
Product Liability
View other Product Liability attorneys
Class Action
View other Class Action attorneys
Environmental cases in Mandeville, Louisiana
Mary takes environmental matters in Mandeville, Louisiana. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mary agrees to represent you.
Insurance cases in Mandeville, Louisiana
Mary takes insurance matters in Mandeville, Louisiana. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mary agrees to represent you.
Litigation cases in Mandeville, Louisiana
Mary takes litigation matters in Mandeville, Louisiana. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mary agrees to represent you.
Personal Injury cases in Mandeville, Louisiana
Mary takes personal injury matters in Mandeville, Louisiana. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mary agrees to represent you.
Product Liability cases in Mandeville, Louisiana
Mary takes product liability matters in Mandeville, Louisiana. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mary agrees to represent you.
Biography
Mary S. Johnson, environmental attorney serving Mandeville
Mary S. Johnson is an attorney based in Mandeville, LOUISIANA. The practice focuses on Environmental, Insurance, and Litigation. Currently practicing at Johnson Gray McNamara LLC. Mary works from Mandeville, Louisiana and takes on environmental matters across the region.
Other Professional Experience:
Founding Member (Nov 2005- Present) Johnson Gray McNamara LLC
Partner (1994 – 2005) and Associate (1988 – 1993) Liskow & Lewis
Law Clerk to the Honorable Wallace A. Edwards, First Circuit Court of Appeal, Louisiana, 1986 – 1988
Year Admitted to Practice:
1986
Education:
Tulane University (B.A., 1983)
Loyola University (J.D., cum laude, 1986)
Law School Honors :
Member, Loyola Law Review
Board Member, Loyola Moot Court Intramural Coordinator
Mary's approach to environmental cases
Ms. Johnson is active in the defense of complex environmental, toxic tort, chemical exposure, carbon monoxide, insurance coverage, medical monitoring, naturally occurring radioactive material (“NORM”) occupational injury cases, oyster, oil spill, pesticide, personal injury, property damage, and class action litigation. She also has an active mediation and appellate practice in the same areas. Ms.…
Clients Mary works with
Mary reviews new inquiries case-by-case for environmental, insurance, and litigation matters in Mandeville and the surrounding Louisiana area.
Credentials
Credentials — where Mary studied and practices
Loyola University New Orleans
J.D. · 1986
Loyola University New Orleans
— · 1986
Jurisdictions
Mary's state bar admissions
Louisiana, Louisiana
ACTIVE
Mary studied at J.D. in Loyola University New Orleans and — in Loyola University New Orleans.
Law school and academic background
Mary completed J.D. in Loyola University New Orleans and — in Loyola University New Orleans. Formal legal training is one signal of substantive knowledge — the day-to-day practice Mary runs in Louisiana is where that training gets applied to real client questions.
Recognition
Mary's legal honors and published work
Mary has received 22 formal recognitions from bar associations, industry bodies, and peer-review services.
Lawyer of the Year — Mass Tort Litigation / Class Actions - Defendants (New Orleans)
2022
Best Lawyers in America — Environmental Law
2026
Best Lawyers in America — Insurance Law
2026
Best Lawyers in America — Litigation - Environmental
2026
Best Lawyers in America — Mass Tort Litigation / Class Actions - Defendants
2026
Best Lawyers in America — Personal Injury Litigation - Defendants
2026
Best Lawyers in America — Additional Areas of Practice:
2026
Best Lawyers in America — Mass Tort Litigation
2026
Best Lawyers in America — Personal Injury Litigation
2026
Best Lawyers in America — Special Focus:
2026
Best Lawyers in America — Appellate
2026
Best Lawyers in America — Asbestos
2026
Best Lawyers in America — Civil Litigation
2026
Best Lawyers in America — Climate Change
2026
Best Lawyers in America — Environmental
2026
Best Lawyers in America — Insurance
2026
Best Lawyers in America — Litigation
2026
Best Lawyers in America — Mass Tort
2026
Best Lawyers in America — Occupational Disease
2026
Best Lawyers in America — Punitive Damages
2026
Best Lawyers in America — Superfunds/Environmental Remediation
2026
Best Lawyers in America — Toxic Tort
2026
Legal awards and honors
Lawyer of the Year — Mass Tort Litigation / Class Actions - Defendants (New Orleans) (2022). Best Lawyers in America — Environmental Law (2026). Best Lawyers in America — Insurance Law (2026). Best Lawyers in America — Litigation - Environmental (2026). Best Lawyers in America — Mass Tort Litigation / Class Actions - Defendants (2026). Best Lawyers in America — Personal Injury Litigation - Defendants (2026).
Locations
Mary S. Johnson's office in Mandeville
Mary's primary office is at 21357 Marion Lane, Suite 300, Mandeville, Louisiana, 21357. In-person meetings are by appointment; a phone intake usually comes first.
Johnson Gray McNamara LLC
21357 Marion Lane, Suite 300
Mandeville, Louisiana 21357
Open in Google MapsClient feedback
Client reviews of Mary S. Johnson
Mary has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.
No reviews yet
Only verified clients who have consulted with Mary S. Johnson can leave a review.
Schedule your consultationHiring guide
How to hire Mary S. Johnson — what to expect in your first consultation
Working with a new environmental attorney should feel structured. Here's how the first two conversations with Mary usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Mary charges for the initial consult. That fee is credited toward representation if you retain Mary'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; Mary will tell you what matters and what doesn't.
Questions to ask a environmental attorney in Mandeville, Louisiana
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 Mary
Mary 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. Mary confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Mary'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 Mary S. Johnson
How much does it cost to hire Mary for a environmental case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Mary walks through the likely range during the consult so there are no surprises.
Does Mary offer a free consultation?
Mary charges for the initial consult; that fee is credited toward representation if you retain Mary's office. Some environmental attorneys offer free consults — check Mary's current terms during booking.
How long do environmental cases in Louisiana 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. Mary gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Mary take my case if I'm outside Mandeville?
Mary is licensed in Louisiana. Matters governed by Louisiana law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Mary 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 Mary?
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. Mary will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Mary accepting new environmental clients right now?
Mary'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 Mandeville, New Orleans and Baton Rouge in Louisiana
Mary handles environmental matters throughout Louisiana. 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 Louisiana
If Mary's intake is full or the fit isn't right, these environmental attorneys in Mandeville handle similar matters. Every profile below is verified and open to consultations.





