Julia Mezhinsky Jayne

Julia Mezhinsky Jayne

San Francisco, California

Julia Mezhinsky Jayne is the founder of Jayne Law Group, P.C.

Ms. Jayne is an experienced and accomplished trial lawyer who concentrates her practice on both white collar and general criminal defense in felony and misdemeanor cases. She represents a broad array of individuals and small businesses in state and federal court, at the investigative, pre-trial, and trial stages. Her successes range from outright case dismissals and acquittals, to extremely favorable plea agreements. Ms. Jayne also has extensive jury trial experience in both state and federal court. Ms. Jayne is committed to making sure each client is satisfied with the result of his/her case. She has handled several newsworthy and high-profile cases.

Her white collar criminal defense matters include prosecutions involving mail and wire fraud violations, bank & tax fraud, environmental crimes, money laundering, alien harboring, money smuggling, antitrust, immigration crimes, insider trading, false statements, identity theft, criminal contempt, tax evasion, and prosecutions with significant asset forfeiture implications.

Ms. Jayne's experience in general criminal defense runs the gamut -- from violent felonies and vehicular manslaughter to drug possession and sales, sexual assault, firearms offenses, juvenile offenses, theft and fraud cases, embezzlement, robbery, burglary, and driving under the influence.

Before founding Jayne Law Group, Ms. Jayne was a partner at the firm of Campbell & Jayne LLP. Ms. Jayne also previously served as a Deputy District Attorney in Contra Costa County. There, she tried all kinds of misdemeanor, felony, and juvenile cases. In her role as a prosecutor, she filed criminal charges, negotiated thousands of cases, and independently tried over 30 jury trials. After leaving the District Attorney's Office, Ms. Jayne worked as a civil litigator at Larson · King in San Francisco. Thereafter, Ms. Jayne worked as a white collar criminal defense attorney and civil litigator at Sideman & Bancroft LLP, where she was involved in the representation of several high-profile white collar criminal defense clients.

Ms. Jayne is also an esteemed adjunct professor at U.C. Hastings College of the Law, where she teaches a course in Trial Advocacy.

Ms. Jayne also served as a legal intern to the Organized Crime Strike Force for the Department of Justice, U.S. Attorneys' Office in San Francisco.

Ms. Jayne is fluent in Russian.

Areas of Practice

  • White Collar Criminal Defense
  • General Criminal Defense
  • Complex Criminal Defense
  • Small Business Compliance & Internal Investigations


  • University of California, Hastings College of the Law, San Francisco, California
    • J.D. - 1999
    • Honors: Graduated Top 20th Percentile
  • Oxford University Faculty of Law, Oxford, England
    • Spring Semester - 1998
  • University of California, Los Angeles, California
    • B.A. magna cum laude - 1995


  • Adjunct Professor of Trial Advocacy, University of California, Hastings College of the Law, 2003 - Present

Honors and Awards

  • Selected as a Super Lawyer in Northern California Super Lawyers®, 2015 - 2018
  • Selected as a Rising Star in Northern California Super Lawyers®, 2009 - 2014

Professional Associations and Memberships

  • Criminal Justice Act Panel ("CJA Panel") for the Northern District of California, Member, 2005 - Present
  • California State Bar Criminal Law Executive Committee, Past Chair and Advisor
  • Eastern European Bar Association, Northern California, Member
  • American Bar Association (ABA) Bay Area Women White Collar Defense Attorneys, Member
  • National Association of Criminal Defense Lawyers, Member

Past Employment Positions

  • Contra Costa County District Attorney's Office, Deputy D.A.
  • Sideman & Bancroft LLP, White Collar Criminal Defense Attorney and Civil Litigator
  • Larson · King, San Francisco, Civil Litigator
  • Campbell & Jayne LLP, Partner
  • Organized Crime Strike Force for the Department of Justice, U.S. Attorneys' Office in San Francisco, Legal Intern

Ancillary Businesses

  • Small Business Compliance & Internal Investigations


  • Russian