Jessica Mackaness San Diego Lawyer

Jessica L. Mackaness Partner

Jessica (“Jessie”) Mackaness specializes in civil business litigation, securities arbitration and litigation, and employment litigation, representing investors, financial professionals, employees, and commercial clients.

Investment recovery, in particular, is one of Jessie's passions. She has helped many investors recover substantial financial losses caused by investment fraud, broker misconduct, and unsuitable recommendations. These types of losses can, and regularly do, happen to educated, young professionals, but more often, it is the unsophisticated and vulnerable elderly who are targeted. Jessie is well-equipped to fight for investor’s rights in any such claim.

Jessie has also assisted financial professionals with a variety of industry-related matters, including Broker Protocol advisement, employment disputes, negotiating the expungement of incorrect or defamatory information on their U-5 forms and BrokerCheck, negotiating and arbitrating promissory note matters, and litigating trade secret claims. Relatedly, she has represented many investment advisors and securities industry professionals in regulatory defense matters involving the SEC, FINRA, and state securities authorities, and is adept at assisting clients through all phases of such matters.

Outside of the securities industry, Jessie regularly helps clients with matters involving complex business disputes, breach of contract, partnership “divorces,” breach of fiduciary duty, and online defamation. She also has extensive experience helping employees with a variety of employment-related disputes, including wrongful termination, discrimination, and hostile work environment claims.

In 2017, 2018, and 2019, Jessie was selected as a San Diego "Rising Star” by Super Lawyers®, an award recognizing no more than 2.5% of lawyers in California. She is a member of Mensa International, and earned her J.D., graduating magna cum laude (top 4%), from the University of San Diego School of Law in 2010, where she was also elected to the Order of the Coif. She earned her B.A., graduating cum laude, in Business Administration with an emphasis in finance from the University of Florida in 2007. Having graduated from an SEC university, Jessie is a rabid college football fan (Go Gators!).


  • Business & Corporate Litigation
  • Investment Fraud & Recovery
  • Financial Services Litigation
  • Elder Abuse
  • Employment Litigation


  • University of San Diego School of Law, San Diego, California
    • J.D., Magna Cum Laude (Top 4%), 2010
    • Order of the Coif
    • Pro Bono Services Recognition Award
  • University of Florida, Gainesville, Florida
    • B.A. (Business Administration), Cum Laude, 2007


  • SuperLawyers® “Rising Star,” 2017, 2018, and 2019 (Business Litigation)
  • San Diego Daily Transcript “Young Attorney” Award, 2013
  • Member, Mensa International
9.9Jessica Lynn Mackaness


  • San Diego County Bar Association
  • Association of Business Trial Lawyers
  • San Diego Inns of Court


  • Presenter, “Proposed ‘Best Interest’ Standard for Brokers: What Is It and Why You Need to Know,” The Knowledge Group Webcast Series, 2018
  • Contributor, “Fighting Slander,” Nicholas Carroll, 2019
  • Presenter, “Underwriting Fraud: Practical Guidance to Prevent and Mitigate Risk,” The Knowledge Congress Webcast Series, 2013
  • Co-Author, “Human Trafficking & Supply Chain for California Businesses,” Transworld Business, 2011


  • California
  • U.S. Court of Appeals, Ninth Circuit
  • U.S. District Court for the Southern District of California
  • U.S. District Court for the Central District of California
  • U.S. District Court for the Northern District of California

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