Timothy D. McMahon

Timothy D. McMahon

San Jose attorney Mark A. Sigala

Timothy D. McMahon is a San Jose, California personal injury attorney and has represented the seriously injured since 1984. Mr. McMahon represents clients in personal injury cases throughout California and the Western United States.

Mr. McMahon graduated from the University of California at Santa Barbara in Pharmacology with High Honors. Prior to attending law school he worked with physicians and scientists at a research hospital studying the biochemical effects of diabetes and other diseases. Mr. McMahon subsequently attended the University of Santa Clara School of Law where he earned his Juris Doctor (J.D.), graduating Magna Cum Laude and in the top ten of his class. His detailed knowledge of medicine and biochemistry is well known among his colleagues and is possibly unique in the field of personal injury.

Mr. McMahon has been recognized by Super Lawyers since 2008, was selected as the 2013 Santa Clara County Trial Lawyer of the Year, and was also named a Street Fighter of the Year finalist in 2010 by the California Consumer Attorneys. Mr. McMahon is a proud member of the Irish Legal 100 which recognizes the top 100 Irish American Attorneys in the United States, and has also been included in The National Trial Lawyers Top 100 in California since 2012. He is an associate member of the American Board of Trial Advocates (ABOTA), a distinguished association recognizing the top trial lawyers in the country.

Strong standing and character within the legal community is essential. With a track record of success, Mr. McMahon has been recognized by both judges and lawyers as a formidable adversary and one of the top trial lawyers in the state. His attention to detail and scientific approach to personal injury is unparalleled.

Bar Admissions:

  • California, 1984
  • Santa Clara County Bar Association, 1984


  • Santa Clara University School of Law, Santa Clara, CA, J.D., 1984
    • Magna cum laude
  • University of California at Santa Barbara, Santa Barbara, CA, B.A., 1979
    • High Honors, Pharmacology

Professional Associations and Memberships:

  • American Board of Trial Advocates, Member, 2005-Present
  • Santa Clara County Trial Lawyers Association, Board of Governors
  • Consumer Attorneys of California, Member

Honors and Awards:

Past Employment Positions:

  • McMahon & Allard, Founder, 2005-2007
  • Popelka Allard, Associate and Partner, 1984-2005


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Contact Our Injury Attorneys At 408-289-1417

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Corsiglia McMahon & Allard, L.L.P.

96 N. 3rd Street, Suite 620
San Jose, CA 95112

Phone: 408-289-1417
Toll Free: 866-433-6797

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