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About me


Attorney Diego F. MacWilliam has been practicing law for more than 20 years. Born in Stanford, California, he spent 17 years and completed high school in Madrid, Spain. When he returned to the United States, he attended the University of California, Berkeley and completed his A.B. in legal studies. He then went on to graduate from Santa Clara University School of Law. Mr. MacWiliam focuses his practice on civil and criminal litigation. He is a seasoned litigator who has numerous trials to his name. He has earned a BV Rating® by Martindale-Hubbell® for his high legal ability and ethics.

Admitted to practice before all courts of the State of California and the United States District Court for the Northern District of California since June, 1992.

Practice: Criminal Defense; Civil Litigation - Personal Injury / Plaintiff; Family Law

Languages:  English, Spanish

Educational Background: H.S. Madrid, Spain / A.B. Legal Studies - University of California, Berkeley / J.D. Santa Clara University School of Law

Recognition: Martindale Hubbell ( BV Rated )


Languages spoken: Spanish, English

Practice areas


  1. Criminal Defense: 100%
    24 years



Fixed (always)

Payment types:

Cash, Check, Credit card

Attorney endorsements

5 total 

Are you an attorney? Endorse this lawyer

  • Richard Alan Wingerden

    I endorse this lawyer. I have had the opportunity to witness his work in the courtroom and have found him to be diligent and hardworking. He is well respected in the legal community.


    Richard Wingerden Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Michael S. Waddington

    I endorse Diego. He is a highly skilled attorney that is well respected in the legal community.


    Michael Waddington Military law Attorney
    Relationship: Fellow lawyer in community

Contact info

Law Office of Diego F. MacWilliam

1625 The Alameda
Suite 800
San Jose, CA, 95126


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
BV RatedMartindale-Hubbell2005
Work experience
TitleCompany nameDuration
PrincipalLaw Office of Diego F. MacWilliam1998 - Present
Association namePosition nameDuration
California Public Defenders AssociationMemberN/A
State Bar of CaliforniaMemberN/A
Santa Clara County Bar AssociationMemberN/A
Publication nameTitleDate
nolo.comWhat Happens in Court: Criminal Case Procedure2013
School nameMajorDegreeGraduated
Santa Clara University School of LawLawJD - Juris Doctor1990
University of California - BerkeleyN/ABA - Bachelor of Arts1986