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Mary S. Johnson

Trusted environmental attorney serving Mandeville.

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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

Practice focus

Mary S. Johnson represents clients in Mandeville, Louisiana across the following areas of law. Each area links to other verified attorneys with the same focus.

Biography

About Mary S. Johnson

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. Johnson has particular abilities in defending premises owners, employers and their executive officers in occupational exposure and related medical monitoring litigation throughout Louisiana. She is defending a number of cases alleging damage to coastal marshes, wetlands, oyster leases, property and global warming claims relating to Hurricane Katrina. She also has substantial experience in multi-party and class action lawsuits, and has handled a number of consolidated NORM, asbestos, pesticide, silica and chemical exposure cases. She defended a major shipyard in the In re: Combustion Inc. toxic tort litigation that included 17 toxic tort suits with over 12,000 plaintiffs alleging personal injury, property damage, and “fear of cancer” against 84 defendants, in addition to third-party demands against over 300 generator companies, the United States Government and the insurers of the former site owners and operators. Ms. Johnson successfully pursued the site owners, operators and their insurers in a CERCLA cost recovery action on behalf of a PRP Group. She was selected for inclusion in The Best Lawyers in America for Environmental Law, Mass Tort Litigation and Personal Injury Litigation 2008-2010.


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

Credentials

Education

  • Loyola University New Orleans

    J.D. · 1986

  • Loyola University New Orleans

    — · 1986

Jurisdictions

Bar admissions

  • Louisiana, Louisiana

    ACTIVE

Recognition

Awards & 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

  • 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

Locations

Office locations

Main office

Johnson Gray McNamara LLC

21357 Marion Lane, Suite 300

Mandeville, Louisiana 21357

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Client feedback

Client reviews

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Frequently asked

Common questions

  • What areas of law does Mary S. Johnson practice?

    Mary S. Johnson focuses on Environmental, Insurance, Litigation, Personal Injury, and Product Liability.

  • Where is Mary S. Johnson located?

    Mary S. Johnson primarily serves clients in Mandeville, Louisiana, with an office at 21357 Marion Lane, Suite 300.

  • Is Mary S. Johnson a verified attorney?

    Mary S. Johnson's profile is listed but has not yet been claimed by the attorney. Verification status is pending.

  • How can I schedule a consultation with Mary S. Johnson?

    You can book a consultation through LawyersListed directly from this page. Initial outreach can also be made by phone at 985-246-6544.