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John Sheehan
Buffalo, New York

(716) 854-2020 Phone
(716) 854-6291 Fax
(800) 621-2020 Toll Free


I am proud to be a part of the excellent team of trial attorneys at Cellino & Barnes.  I have represented injured persons since my admission to practice law in 1988 and have derived great satisfaction helping people in their time of need.  I relish the opportunity to zealously represent my clients whose lives have been adversely affected by the carelessness of others.

I have prosecuted cases against some of the country's biggest companies and insurance carriers.  I appreciate my role as my clients' champion when they face a "David versus Goliath" confrontation in their personal injury claim. 

I have found that success is dependent on 1) a focused, positive attitude, 2) disciplined preparation and 3) the relentless pursuit of the desired goal.  I approach the practice of law with these principles in mind.


  • Bachelor of Arts: 1982  Canisius College
  • Juris Doctorate: 1987  McGeorge School of Law, Univ. of the Pacific
  • Licensed to practice law in New York and California


  • Trial Attorney - Cellino & Barnes (2003 - Present)
  • Trial Attorney - Hellerer, Cuomo & O’Connor (1999 – 2002)
  • General Counsel - The Erie Group of Companies (1998)
  • Trial Attorney - Law Offices of John A. Sheehan (1991 – 1997)
  • Trial Attorney - Hoseit & Koelewyn (1990 – 1991)
  • Trial Attorney - VanTassell & Fornasero (1988 – 1989)

Honors and Professional Organizations

  • Erie County Bar Association
  • The State Bar of California  

Community/Military Service

  • Youth Hockey Coach (1988-1997)


  • I live in West Seneca with my wife and daughter. 
  • I enjoy running and cycling and the outdoor activities of hunting, fishing, hiking and camping.

Attorney Sheehan represents victims who have been injured as a result of motorcycle accidents, truck accidentsconstruction accidentsslip and falls, and more.

Cellino & Barnes serves clients throughout Nassau County and Suffolk County, including, but not limited to: Amityville, Babylon, Bayshore, Brentwood, Centereach, Central Islip, Commack, Copiague, Deer Park, Freeport, Hauppauge, Hicksville, Huntington, Islip, Levittown, Lindenhurst, Massapequa, Melville, Merrick, Norwich, Patchogue, Smithtown, Syosset and Wantagh.

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