Best's Insurance Professional Resources
Client-Recommended Attorneys, Adjusters and Experts
Best's Insurance Professional Resources
Client-Recommended Attorneys, Adjusters and Experts


Best's Recommended Insurance Attorneys - General Defense

3610 Fourteenth Street, Riverside, California 92501

Mailing Address: P.O. Box 1299, Riverside, CA 92502-1299

Established: 1915

Practice Areas

  • Insurance Defense
  • Medical Malpractice
  • Automobile Liability
  • General Liability
  • Construction Litigation
  • Coverage Issues
  • Personal Injury
  • Product Liability
  • Premises Liability
  • Employment Law
  • Commercial Litigation
  • Bankruptcy
  • Alternative Dispute Resolution
  • Appellate Practice
  • Complex Litigation
  • Real Estate
  • Public Agency Representation

About Us

In 2015 Thompson & Colegate LLP celebrated its 100th anniversary as a full service law firm handling litigation and transactional matters for its clients. The firm provides a broad range of legal services to insurance carriers, educational institutions, school districts, healthcare providers, governmental entities, businesses and individuals throughout California. The firm's practice was built on a tradition of excellence and integrity in providing legal services. The firm's commitment and approach is to understand client objectives and identify the most practical ways to accomplish them. Members of the firm are regularly involved in and serve on boards for community activities and organizations.

Client Information

Insurance Clients

  • AdminSure Inc.
  • Carl Warren & Company
  • Dignity Health
  • Gallagher Bassett Services, Inc.

Non-Insurance Clients

  • Alliance of Schools for Cooperative Insurance Programs
  • Alvord Unified School District
  • Chino Valley Unified School District
  • Jurupa Unified School District
  • Provident Savings Bank
  • Riverside Unified School District

Self-Insured Clients

  • County of Riverside
  • County of San Bernardino

Personnel Information

Partners


H. L. Thompson — (1885-1962)

Roy W. Colegate — (1906-1960)

Michael J. Marlatt

Riverside, CA

Admitted
  • California, 1984
  • U.S. District Court, Central District of California, 1984
  • U.S. Court of Appeals, Ninth Circuit, 1984
Additional Biographical Details:

Lecturer: University of Amsterdam Law School, Princeton University and Loma Linda University School of Medicine; Chairman, Civil Law Program, University of California at Riverside; Civil Bench and Bar Committee of the Superior Court (Attorney Member); Arbitrator, Mediator and Judge Pro Tem, Riverside and San Bernardino Superior Courts; AV-Rated, Martindale Hubbell; Listed in Super Lawyers and Best Lawyers; American Medical Association; California State Association of Counties Excess Insurance Carrier Program

Memberships:
  • State Bar of California
  • Riverside County Bar Association
  • Association of Southern California Defense Counsel (Board of Directors)
  • California Association of Healthcare Managers (Past Bylaws Committee)
  • American Board of Trial Advocates (Past President, San Bernardino/Riverside Chapter; Masters in Trial)
  • Southern California Association of Healthcare Risk Managers
  • California Association of School Business Officials
Education:
  • University of Southern California
  • California Polytechnic State University, B.A., 1981
  • Pepperdine University, J.D., 1984
Fraternity Information:
Phi Alpha Delta
Honors:
NASA Achievement Award Recipient; Research Associate, University of Southern California School of Medicine; CAL-ABOTA Trial Lawyer of the Year Nominee for 2018-2020

Diane Mar Wiesmann

Riverside, CA

Admitted
  • California, 1986
  • U.S. District Court, Central District of California, 1998
Additional Biographical Details:

American Red Cross, Riverside Chapter (Board of Directors)

Memberships:
  • State Bar of California
  • Riverside County Bar Association
  • Association of Southern California Defense Counsel (President 2012)
  • Bench-Bar Coalition
  • Leo A. Deegan Chapter, Inns of Court
  • Southern California Association of Healthcare Risk Management
  • Defense Research Institute
  • Federation of Defense and Corporate Counsel
Education:
  • The University of Arizona, B.A., 1983
  • The University of Arizona, J.D., 1986

Gary T. Montgomery

Riverside, CA

Admitted
  • California, 1993
  • U.S. District Court, Central District of California, 1993
Additional Biographical Details:

Greater Riverside Chambers of Commerce (Board of Directors)

Memberships:
  • State Bar of California
  • Riverside County Bar Association
  • Association of Southern California Defense Counsel (Board of Directors)
  • Federation of Defense and Corporate Counsel
Education:
  • Princeton University, A.B., 1989
  • Pepperdine University, J.D., 1993

Craig M. Marshall

Riverside, CA

Admitted
  • California, 1999
  • U.S. District Court, Central District of California
  • Supreme Court of California
Additional Biographical Details:

Riverside Community Health Foundation (Board Member; Past Secretary); Riverside Medical Clinic Foundation (Board Member; Past Vice-President); Mission Inn Foundation; U.C.R. (Alumni Association, Board of Trustees; Athletic Association; Planned Giving Advisory Board); Riverside Estate Planning Council (Board Member); AV-Rated, Martindale Hubbell; Inland Empire Planned Giving Council; Inland Empire Economic Partnership (Past Board Member); Visiting Nurse Association of the Inland Counties Ethics Committee (Past Member); Lecturer Loma Linda University School of Dentistry (Practice Management Seminar)

Memberships:
  • American and Riverside Bar Associations
  • State Bar of California
  • Leo A. Deegan Inn of Court (Past Member)
Education:
  • University of California, Riverside, B.A. (magna cum laude, Phi Beta Kappa), 1995
  • Pepperdine University, M.B.A., 1998
  • Pepperdine University School of Law, J.D. (cum laude), 1999
Honors:
Academic All-American; Straus Institute Certificate of Dispute Resolution; Political Science Dept.-Graduating Senior Award

Of Counsel


John A. Boyd

Riverside, CA

Admitted
  • California, 1979
  • U.S. Supreme Court, 1979
  • U.S. District Court, Central and Southern Districts of California, 1982
  • U.S. Bankruptcy Court, Central and Southern Districts of California
  • U.S. Bankruptcy Court, Eastern and Northern Districts of California, 2011
Memberships:
  • State Bar of California
  • Riverside County Bar Association
Education:
  • San Diego State University, B.S., 1976
  • Pepperdine University, J.D. (cum laude), 1979

Susan Knock Beck

Riverside, CA

Admitted
  • California, 2004
  • U.S. District Court, Central District of California, 2004
  • U.S. Court of Appeals, Ninth Circuit, 2006
  • U.S. Supreme Court, 2010
  • U.S. District Court, Southern District of California, 2012
Additional Biographical Details:

La Sierra University, Upper Division Social Work Studies, 1999

Memberships:
  • State Bar of California
  • Riverside County Bar Association (Past Chair, Appellate Section)
  • Leo A. Deegan Inn of Court (2006-2009)
  • Association of Southern California Defense Counsel (Amicus Committee)
Certifications:
  • Certified Specialist, Appellate Law, The State Bar of California
Education:
  • Riverside City College, A.A. (with honors), 1984
  • University of La Verne, J.D., 2003
Law Review:
Supervising Staff Editor/Senior Staff Writer, University of La Verne Journal of Juvenile Law

Associates


Charmaine E. Grant

Riverside, CA

Admitted
  • California, 2002
  • U.S. District Court, Central District of California
Memberships:
  • State Bar of California
  • Riverside County and Western San Bernardino Bar Associations
  • Association of Southern California Defense Counsel
Education:
  • University of California, Riverside, B.A., 1996
  • California Western School of Law, J.D., 2000
Language:
  • Tagalog

Daniel C. Faustino

Riverside, CA

Admitted
  • California, 2000
  • U.S. District Court, Central District of California, 2000
  • U.S. Court of Appeals, Ninth Circuit, 2000
Memberships:
  • State Bar of California
  • Riverside County Bar Association
  • Association of Southern California Defense Counsel
Education:
  • University of California, Santa Cruz, B.A., 1993
  • Whittier Law School, J.D., 1998

Trevor D. DeBus

Riverside, CA

Admitted
  • California, 2013
  • U.S. District Court, Central District of California, 2013
Memberships:
  • State Bar of California
  • Riverside County Bar Association
  • Association of Southern California Defense Counsel
Education:
  • University of California, Riverside, B.A. Political Science, 2007
  • Western State University College of Law, J.D., 2012

Stacy K. Brigham

Riverside, CA

Admitted
  • California, 1994
  • U.S. District Court, Central District of California
  • U.S. Supreme Court
Memberships:
  • Riverside County Bar Association
Education:
  • Western State University, B.S., 1992
  • Western State University College of Law, J.D., 1994

Bret Zaccaglin

Riverside, CA

Admitted
  • California, 2021
Memberships:
  • Riverside County Bar Association
Education:
  • California Baptist University, B.A., 2017
  • California Western School of Law, J.D., 2020

Service Areas

Indio, California, USA 75 miles

Ontario, California, USA 23 miles

Palm Desert, California, USA 70 miles

Palm Springs, California, USA 56 miles

Redlands, California, USA 14 miles

San Bernardino, California, USA 10 miles

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