Borton Petrini


Rosemarie S. Lewis

Rosemarie S. Lewis is the Firm Managing Partner of Borton Petrini, LLP. She also manages the Firm’s Orange County and Bakersfield offices. Rosemarie began her legal career at Borton Petrini in 1991 as a Law Clerk and has risen through the ranks of the Firm.

She did her undergraduate work at the University of Southern California and received her Juris Doctorate from Western State University in 1991 with an emphasis in tax law. She won academic honors in law school with AmJur Awards in Corporations and Trial Advocacy and was recognized nationally for her skills on her law school’s Moot Court team. Prior to joining the Firm, Rosemarie served internships at the California Attorney General’s Office and the Orange County District Attorney’s Office.

Rosemarie is one of the Firm’s most experienced litigators. She has successfully tried tort cases, including premises and product liability lawsuits involving catastrophic injuries all over Southern California, from Santa Maria to San Diego, San Bernardino to Ventura, as well as in Kern, Orange, and Los Angeles counties. In addition, she has appeared before the California Court of Appeal, California Supreme Court and the Ninth Circuit Court of Appeals.

Rosemarie’s practice area as a Los Angeles lawyer covers all aspects of business and commercial litigation. Her emphasis is employment law, defending employers in discrimination, wrongful termination, and sexual harassment claims.

She advises companies on relevant areas of labor and employment law and frequently speaks on topics such as pre-litigation investigation, attorney-client privilege, and workplace violence prevention. She continues to provide training and seminars on labor and employment issues.

Her construction defect cases as a Los Angeles lawyer have involved defending developers, general contractors, and sub-contractors, and have dealt with such issues as roofing, sheet-metal, concrete, plumbing, and pools. She also represents various public entities and has handled professional liability cases pertaining to architect and engineer errors and omissions, and director and officer liability.

Rosemarie volunteers her time as an arbitrator/mediator in the Los Angeles Superior Courts. She also belongs to several professional organizations, including the State Bar of California, the Los Angeles County Bar Association, Orange County Bar Association, Women Lawyers Association of Los Angeles, the Association of Southern California Defense Counsel, and the Hispanic National Bar. She still stays active with her Alma Mater through her membership in USC’s Alumni Association, Latino Alumni Association, and USC Athletic Support Groups.

Rosemarie’s community service endeavors include volunteering her efforts toward causes for women and children in Los Angeles, including volunteering at a Center for battered women and children. Her family supports MADD, Special Olympics, and USC’s Physically Challenged Athletes Scholarship Fund. She and her family enjoy sports, golf, and travel. Rosemarie is a diehard USC football fan. Her favorite reading material: historical or biographical novels.

Rosemarie is married to Jeffrey Lewis, and their two children are Casey and Evan.

Editor, Insurance Coverage & Bad Faith Newsletter

Lectures & Seminars:
Meet the Experts, 2006


University of Southern California, B.A., 1983
Western State University, J.D., 1991


State Bar of California, 1991
U.S. District Court, Northern, Southern, Eastern, and Central Districts of California

Business & professional Associations

American Bar Association
Association of Southern California Defense Counsel
Hispanic National Bar Association
Los Angeles County Bar Association
Orange County Bar Association
USC Commerce Association
Women Lawyers Association of Los Angeles

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