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Lisa Henderson Mattern

About me

Ms. Mattern has extensive experience defending clients in both State and Federal courts. She has defended clients charged with a range of offenses including: Kidnapping; Murder; Rape; Mayhem; Arson; Assault and Battery; Statutory Rape; Sexual Battery; Lewd Conduct and Indecent Exposure; Embezzlement; Fraud and Money Laundering; Child Molestation and Child Pornography; Stalking and Terrorist Threats; Counterfeiting and Money Laundering; Conspiracy; Robbery; Possession for Sale and Possession of Controlled Substances, Drug Transportation and Manufacturing; Cultivation of Marijuana; Driving Under the Influence of Alcohol and Drugs; Gang Crimes; Third-Strike; Appeals and Post-conviction Relief.


Ms. Mattern graduated from Loyola Law School, Los Angeles in 1994. She was admitted to the State Bar of California in 1995. While she was a student at Loyola Law School, she was a member of the Loyola of Los Angeles Law Review. From 1996 to 2000, Ms. Mattern worked for the Law Offices of the Public Defender for the County of Riverside. After that she opened her own law office and worked for a criminal defense panel in Riverside County. During this time, she tried and defended thousands of clients charged with a range of offenses. She and her partner, Lori A. Davis, formed Davis & Mattern, LLP, a firm dedicated to the practice of criminal defense, in 2000 and relocated to Newport Beach. In 2007, Ms. Mattern closed her law practice, but continued defending clients in private practice. From 2007 through 2011, Ms. Mattern worked as a Senior Attorney for two large criminal defense law firms. In 2011, she renewed her private practice, now under the name Mattern & Mendoza, LLP, in Los Angeles. 


Ms. Mattern is a member of the Criminal Law section of the California Bar.  She is a former Temporary Judge for the Superior Court for the County of Orange. She has been admitted to Federal and State courts throughout California and across the United States. She has achieved impressive results, including dismissals of charges against her clients who were facing various kinds of charges.


Ms. Mattern has obtained sentences of electronic monitoring, work furlough and county jail for clients against whom prosecutors initially sought long state prison sentences. She is a member in good standing of:


  • The State Bar of California


  • California Public Defenders Association


  • California DUI Lawyers Association


  • Los Angeles Country Bar Association


  • California NORML Legal Committee


Languages spoken: English, French, Spanish

Photos and videos

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Practice areas


  1. Criminal Defense: 50%
    21 years, 7 thousand cases
  2. Violent Crime: 30%
    21 years, 2 thousand cases
  3. Sex Crime: 20%
    21 years, 1.5 thousand cases



Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

24 total 

Are you an attorney? Endorse this lawyer

  • Leigh Gretchen Fleming

    Lisa is knowledgeable, experienced, and tirelessly willing to fight your case. I would not hesitate to refer her to my closest friends or family members. I strongly endorse this lawyer.


    Leigh Fleming DUI and DWI Attorney
    Relationship: Other

  • Gary Darrel Labin

    Lisa Mattern and I worked together several years ago and I was always impressed by her breadth of knowledge and dedication to her clients. She is a fantastic attorney and I couldn't say more positive about her!


    Gary Labin DUI and DWI Attorney
    Relationship: Other

Contact info

Mattern & Mendoza, LLP

Howard Hughes Center
6601 Center Drive West, Suite 500
Los Angeles, CA, 90045

Mattern & Mendoza, LLP

Valley Executive Tower
15260 Ventura Boulevard, Suite 1200
Sherman Oaks, CA, 91403

Mattern & Mendoza, LLP

Avenue of the Stars
1999 Avenue of the Stars, Suite 1100
Century City, CA, 90067



We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top Contributor (Criminal Defense)Avvo2016
Nations Top One PercentNational Association of Distinguished Counsel2016
Top 100 Trial LawyersNational Trial Lawyers2016
10 Best for Client SatisfactionAmerican Institute of Criminal Law Attorneys2016
Nation's Top One percentNational Association of Distinguished Counsel2015
Top 100 Trial LawyersNational Trial Lawyers2015
10 Best for Client SatisfactionAmerican Institute of Criminal Law Attorneys2015
Top Contributor (Criminal Defense)Avvo2014
Top 100 Trial LawyersNational Trial Lawyers2014
Top Lawyers in CaliforniaAmerican Lawyer Media2014
Top Lawyers in CaliforniaAmerican Lawyer Media2013
Top 100 Trial LawyersNational Trial Lawyers2013
NHTSA SFST PractitionerLaPier & Associates2008
Admitted to practiceUnited States Central Court, Central District of California1995
Dean and Faculty ScholarshipLoyola Law School, Los Angeles1994
Law ReviewLoyola Law School, Los Angeles1994
Law ReviewLoyola Law School, Los Angeles1993
Dean and Faculty ScholarshipLoyola Law School, Los Angeles1993
Dean and Faculty ScholarshipLoyola Law School, Los Angeles1992
Dean and Faculty ScholarshipLoyola Law School, Los Angeles1991
Good Citizen ScholarshipDaughters of the American Revolution1985
Gold Seal BearerCalifornia Scholarship Foundation1985
Work experience
TitleCompany nameDuration
Managing PartnerMattern & Mendoza, LLP2011 - Present
Managing AttorneyThe Kavinoky Law Firm2007 - 2009
Temporary JudgeCounty Of Orange2006 - 2010
Managing PartnerDavis & Mattern, LLP2000 - 2008
Of CounselLaw Offices of Lawrence S. Eisenberg1996 - 1997
Attorney IIILaw Offices Of The Public Defender, County Of Riverside1996 - 2000
AttorneyLaw Offices of Randall C. Bertz1994 - 1996
Legal InternHarriett Buhai Center For Family Law1992 - 1994
Legal InternLos Angeles City Attorney1992 - 1993
Association namePosition nameDuration
Western San Bernardino County Bar AssociationMember2013 - Present
Long Beach Bar AssociationMember2013 - Present
San Fernando Valley Bar AssociationMember2012 - Present
California DUI Lawyers AssociationMember2007 - Present
California Public Defenders AssociationMember1997 - Present
California Attorneys for Criminal JusticeMember1997 - Present
NORMLLifetime Member1996 - Present
Los Angeles County Bar AssociationMember1996 - Present
California NORML Legal CommitteeMember1996 - Present
State Bar of CaliforniaMember1996 - Present
Legal cases
Case nameOutcome
People v. A.C.Case dismissed.
People v. S.M.Case dismissed.
People v. D.H.Case dismissed.
See all legal cases 
Publication nameTitleDate
www.matternmendozalaw.comUse of Medical Marijuana: Conflicting State and Federal Laws2013
www.matternmendozalaw.comIssues With Medical Marijuana in California2013
School nameMajorDegreeGraduated
Loyola Law School, Loyola Marymount UniversityLawJD - Juris Doctor1994
University of California - IrvinePolitical ScienceBA - Bachelor of Arts1989
Speaking engagements
Conference nameTitleDate
Step Together for SuccessVeterans & Veterans' Families2013
Proposition DMedical Marijuana2013
Patient Rights and ResponsibilitiesMedical Marijuana2004
WorkshopMedical Marijuana Guidelines2003