Matthew M. Sonne

Matthew M. Sonne: Attorney with Sheppard, Mullin, Richter & Hampton LLP

Biography

Matthew Sonne is a partner in the Labor and Employment Practice Group in the firm's Orange County office. He is fluent in Spanish, and frequently advises employers on Spanish-speaking workforce issues in addition to the below areas of expertise.

Areas of Practice

Mr. Sonne specializes in labor and employment law representing employers. He litigates in multiple areas of employment law and defends against individual and class action lawsuits alleging violations of wage and hour laws, discrimination, wrongful termination, harassment, breach of contract, labor code section 132a claims, and other related matters. Mr. Sonne represents employers in state and federal courts, as well as before the DLSE, EDD, and other administrative bodies. He also advises employers on handbook preparation, employment contracts and applications, and personnel policies. Mr. Sonne also has experience with the National Labor Relations Board and has represented employers in related investigations. He also has experience in civil appeal practice, including briefing and oral argument before the California Court of Appeal and briefing to the California Supreme Court.

Prior to attending law school, Mr. Sonne worked in the White House as a writer, and also was a member of the Clinton-Bush Transition Team in 2000. He also worked in the Antitrust Division of the U.S. Department of Justice.

While attending the University of Virginia Law School, Mr. Sonne was a member of the Virginia Journal of International Law and also taught undergraduate Spanish at the university. He also participated in clinical work for the Charlottesville Public Defender's office and successfully defended criminal cases in general district court. Mr. Sonne was elected president of the Rex E. Lee Law Society.

Honors

•Labor and Employment, Legal 500, 2015
•Southern California Rising Star, Super Lawyers, 2009-2016

Articles

•21 Tips for Lawyers to Make Better 2nd Drafts
Daily Journal , February 21, 2018
•The Pros and Cons of Employment Arbitration Agreements
Orange County Business Journal , August 18, 2014
•Towards a “Manageability” Standard in PAGA Discovery
ABTL Report , Summer 2014
•Mr. Sonne is a member of the Editorial Board of the California Labor & Employment Alert (Castle Publications Ltd.)

Labor & Employment Law Blog Posts

• U.S. Supreme Court Requires Litigants To Prove But-For Causation In Workplace Retaliation Lawsuits, June 27, 2013
• Title VII's Anti-Retaliation Provisions Protect Employee's Answers To Sexual Harassment Investigator's Questions, February 3, 2009
• Case Reminds California Employers That Handbook Language Cannot Compensate For A Missing Signature On An Employment Arbitration Agreement, December 21, 2007
• Ninth Circuit Recognizes Claim for Reverse Religious Discrimination and Highlights Pitfall of 'Consensus of Management' Employment Actions, May 30, 2007

Media Mentions

•Hold Managers Accountable for California Meal-Break Compliance
Society for Human Resource Management , June 22, 2018
•Case to Watch: California Supreme Court weighs employment arbitration
Thomson Reuters , June 11, 2013
•Defense Wants More Class-y PAGA Suits
The Recorder , August 15, 2007

Speaking Engagements

•Mr. Sonne was the keynote speaker on Case Law Updates at the Employers Group's Workplace and Employment Law Update in Orange County.
•Mr. Sonne lectured managers and owners in the food service/restaurant industry in a presentation entitled Wage & Hour Crisis In The Food Service Industry.
•Mr. Sonne was a presenter at a recent Breakfast With Your Labor Lawyer series.
•Mr. Sonne delivered a lecture in Spanish to managers at a major construction and design firm in southern California entitled How to Prevent Discrimination, Harassment, and Retaliation in the Workplace.
•Mr. Sonne lectures for Castle Publications, Ltd. on Wage and Hour Laws.
•Mr. Sonne has presented lectures for employer's organizations such as Professionals in Human Resources Association (PIHRA).
•Mr. Sonne frequently conducts seminars in sexual harassment prevention/training to supervisors and employees, in both English and Spanish. He also lectures at corporate retreats and annual meetings on employment law issues.

Newsletters

•Enfoque Latino - Fall 2006
December 7, 2006

Events

•2019 Wage And Hour Laws
Summer 2019

•Breakfast With Your Labor Lawyer - Orange County
Spring 2019 Seminar Series
April 24, 2019
•2019 Wage And Hour Laws
Winter 2019

•Labor & Employment Law Update & Happy Hour - Orange County
Fall 2018 Seminar Series
October 24, 2018
•2018 Wage and Hour Laws
Summer 2018

•Breakfast With Your Labor Lawyer - Orange County
Spring 2018 Seminar Series
April 18, 2018
•2018 Wage And Hour Laws
Winter 2018

•Pay Equity: Latest Views on Legislative and Case Law and Employer Progress & Challenges
Newport Beach , January 25, 2018
•Labor & Employment Law Update & Happy Hour - Orange County
Fall 2017 Seminar Series
October 17, 2017
•2017 Wage and Hour Laws
Summer 2017

•Key Developments in Wage and Hour Laws and PAGA
Orange County Bar Association
Radisson Hotel, Newport Beach , August 14, 2017
•Breakfast With Your Labor Lawyer - Orange County
Spring 2017 Seminar Series
April 27, 2017
•2017 Wage and Hour Laws
Winter 2017

•Labor & Employment Law Update & Happy Hour - Orange County
Fall 2016 Seminar Series
October 26, 2016
•2016 Wage and Hour Laws
Castle Publications, Ltd. Labor & Employment Seminars
Fall 2016
•Breakfast With Your Labor Lawyer - Orange County
Spring 2016 Seminar Series
May 4, 2016
•Labor & Employment Law Update & Happy Hour - Orange County
Fall 2015 Seminar Series
September 16, 2015
•Breakfast With Your Labor Lawyer - Orange County
Spring 2015 Seminar Series
May 20, 2015
•2015 Wage and Hour Laws
Castle Publications, Ltd. Labor & Employment Seminars
Winter 2015
•Wage & Hour Claims and Class Actions
American Conference Institute’s 22nd National Forum
The Westin Bonaventure Hotel & Suites, Los Angeles , September 30, 2014
•2014 Wage and Hour Laws
Summer 2014: August 12 and 20

•Breakfast With Your Labor Lawyer - Orange County
Spring 2014 Seminar Series
April 9, 2014
•2014 Wage and Hour Laws
Winter 2014: February 19, March 4 and 20

•Labor and Employment Law Update and Happy Hour - Orange County
Fall 2013 Seminar Series
Westin South Coast Plaza , October 8, 2013
•2013 Employment Discrimination and Personnel Relations Laws - Pasadena Area and Orange County
Summer 2013: July 31, August 15

•2013 Wage and Hour Laws - Pasadena Area, Los Angeles, and Orange County
Summer 2013: July 30, August 7, August 14

•Breakfast With Your Labor Lawyer - Orange County
Spring 2013 Seminar Series
Westin South Coast Plaza, Orange County , March 27, 2013
•Labor and Employment Law Update & Happy Hour Fall 2012 - Orange County
Westin South Coast Plaza , October 10, 2012
•Meal Periods, Rest Periods and Labor Code Class Actions After Brinker
WebEx , April 18, 2012
•Labor and Employment Law Update & Happy Hour Spring 2012 - Orange County
Westin South Coast Plaza , March 28, 2012
•2012 Wage and Hour Laws - San Francisco, Orange County, Pasadena and Los Angeles
Winter 2012: February 6, February 15, February 22 and February 29

•BRACE Program Quarterly Event
Cypress Community Center , February 23, 2012
•Breakfast With Your Labor Lawyer - Orange County
Labor & Employment Law Update Fall 2011
Westin South Coast Plaza , October 5, 2011
•The Aftermath of AT&T Mobility v. Concepcion
Labor & Employment Law Webinar
WebEx , May 26, 2011
•Labor & Employment Law Update & Happy Hour - Orange County
Westin South Coast Plaza - Orange County , March 10, 2011
•2011 Wage and Hour Laws - San Francisco, Orange County, Pasadena and Los Angeles
Winter 2011: February 7, February 15, February 23, and March 2

•Labor & Employment Law Update & Happy Hour - Orange County
Our New, Improved, and FREE Breakfast With Your Labor Lawyer (in the Evening!)
Westin South Coast Plaza - Costa Mesa , September 14, 2010
•2010 Wage and Hour Laws Series - Los Angeles, Orange County, San Francisco and Pasadena

•Labor and Employment Law: Mid-Year Update 2009 - Costa Mesa
Breakfast With Your Labor Lawyer
Westin South Coast Plaza , September 23, 2009
•2009 Wage and Hour Laws Series - Los Angeles, Orange County, San Francisco and Pasadena

•New Labor & Employment Laws for 2009 - Orange County
Breakfast With Your Labor Lawyer
Westin South Coast Plaza , February 12, 2009
•Labor and Employment Law: Mid-Year Update 2008 - Orange County
Breakfast With Your Labor Lawyer
Westin South Coast Plaza , September 10, 2008
•Breakfast With Your Labor Lawyer - Orange County
The Westin South Coast Plaza , February 5, 2008

Areas of Practice (28)

  • Labor and Employment
  • Labor and Employment Counseling
  • Employee Hiring/Discipline/Termination
  • Employment Agreements
  • Handbooks and Personnel Policies
  • Harassment Investigation and Training
  • Unfair Competition and Trade Secrets
  • Wage and Hour Regulations
  • Workplace Violence
  • Labor and Employment Litigation
  • Discrimination, Harassment, and Retaliation
  • Wage and Hour Class Actions
  • Wrongful Termination
  • International Reach
  • Latin American Practice
  • Government Contracts, Investigations & International Trade
  • Public Policy and Government Affairs
  • Communications
  • Construction
  • Entertainment and Digital Media
  • Fashion, Apparel and Beauty
  • Financial Services
  • Food and Beverage
  • Healthcare
  • Hospitality
  • Insurance
  • Mortgage Banking
  • Retail

Education & Credentials

Contact Information:
714.424.2802  Phone
714.513.5130  Fax
www.sheppardmullin.com
University Attended:
Claremont McKenna College, B.A., magna cum laude, 2000 Phi Beta Kappa
Law School Attended:
University of Virginia, J.D., 2005
Year of First Admission:
2005
Admission:
U.S. District Court for the Northern, Central, and Southern Districts of California; United States Court of Appeals for the Ninth Circuit; 2005, California
Memberships:

Memberships

•Member, Orange County Bar Association, Labor and Employment Section
•Member, American Bar Association

Languages:
Spanish
Reported Cases:
Published Decisions: Corder v. Houston's Restaurants, Inc., 424 F. Supp. 2d 1205 (C.D. Cal. 2006) (held meal and rest periods violations were penalties subject to a one-year, rather than a four-year, statute of limitations).; Recent Victories; Successfully defended a national clothing retailer in a jury trial before Orange County Superior Court. The Plaintiff alleged wrongful termination and retaliation in violation of public policy. Won a complete defense verdict.; Achieved what may be the first trial court ruling in California enforcing a class action waiver after the California Supreme Court's Gentry decision made such waivers difficult to enforce.; Defeated class certification for a retail service company on all counts in a wage and hour class action before the Los Angeles County Superior Court.
ISLN:
918657549

Peer Reviews

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*Peer Reviews provided before April 15, 2008 are not displayed.

Costa Mesa, California

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