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Peter Michael Callahan

Peter Michael Callahan

Practice areas:


About Me

Although my life in the law has been as a litigator - I started out trying felonies for the Chicago Public Defender's Office 1967 -'69 and switched to civil litigation when I came to California in 1970 - most of my cases are resolved through negotiation. I have participated in hundreds of successful mediations over the years, and for the last 20 years I have acted as a pro tem Judge for the Superior Courts of several counties, handling both trials and settlement conferences. A few years ago, at the request of the local judges, I completed a week-long instuction course for mediators at Pepperdine Law School, and since then have acted as a mediator from time to time.  I taught Civil Procedure at Western State University School of Law and have given state-wide seminars for State Bar CLE credit. I have been a presenter at our local Inns of Court, a frequent lecturer at the Orange County Claims Managers Forum, various local colleges, and State Bar Continuing Legal Education seminars.

I am proud of the fact that for at least the last two decades, the judges and lawyers of my legal community have anonymously awarded me a completely unsolicited  "AV" rating (the highest available in both ethics and legal competence) in the Martindale-Hubbel National Legal Directory. Every year starting in 2005 through to the present, I have been designated a "Super Lawyer" by Los Angeles Magazine, an unsolicited designation based on peer reviews by the judges and fellow lawyers in my legal community. Our statewide legal newspaper "The Daily Law Journal" designated me to be among "The 100 Most Influential Lawyers in California" in 2005. In 2009, Pope Benedict XVI awarded me the Papal Cross of Honour, the highest award available to a member of the laity.

I am married to my wife of 45 years and we have been blessed with two daughters, the older is a lawyer married to an accountant and has two sons,  and the younger is a doctor of psychology who is married to a doctor of psychology and has a son and a daughter.


Practice Areas

Licensed since 1967

  1. Litigation: 100%
    48 years, 2 thousand cases



Free Consultation (30 minutes)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

5 total 

  • Michelle A. Reinglass

    I endorse this lawyer. I have known Peter for decades, both through ABOTA and as an opposing counsel. Peter is the consummate professional. He is smart and very hard working; Peter the highest integrity, morals and ethics. Even when we disagreed on an issue in litigation, he always demonstrated a high level of competence and civility. He was approachable, responsive, resolution-oriented, while representing his client passionately and zealously. He maintains his humanity and judgment while being an excellent litigator.


    Michelle Reinglass Mediation Attorney
    Relationship: Opposing Counsel on matter

  • Deborah Lynne Pernice-Knefel

    I have known Pete for over 25 years both personally and professionally. He is a lawyer I have looked up to and admired as so many in the legal community have. He is without question a true "super lawyer”: a trial lawyer extraordinaire. His record of success and legal acumen are legendary. When I need to refer a client with a complex or high profile litigation, I immediately think of Pete, whom I know will deliver the finest legal services available anywhere.


    Deborah Pernice-Knefel Employment & Labor Attorney
    Relationship: Fellow lawyer in community

Contact Info

Callahan Thompson Sherman & Caudill, LLP

2601 Main Street
Suite 800
Irvine, CA, 92614


ILNot Authorized To Practice Law196705/14/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Cross of HonourPope Benedict XVI2009
"100 Most Influential Lawyers in California"Daily Law Journal (California statewide)2005
Top Fifty Orange County Super LawyersLos Angeles Magazine2005
Papal KnighthoodCatholic Church2005
American Board of Trial AdvocatesEthics, Professionalism and Civility Award2004
Lawyer of the YearSt. Thomas More Society2004
Phi Kappa PhiThe Academic Honor Society (Lifetime)1994

Work Experience
TitleCompany NameDuration
PartnerCallahan, Thompson, Sherman and Caudill2009 - Present

Association NamePosition NameDuration
Chaminade UniversityBoard of Governors2003 - 2009
Special Forces AssociationLife Member2003 - Present
California Paralyzed Veterans of AmericaSpecial Counsel2002 - 2002
National Institute of Forensic StudiesIndustry Advisory Committee2000 - 2000
American LegionLife member2000 - Present
International Association of Defense CounselBoard of Editors, Defense Counsel Journal1998 - Present
Community Incentives for Teaching ExcellenceBoard of Directors1998 - 1998
Orange County Legal FoundationBoard of Directors1990 - Present
American Board of Trial AdvocatesDiplomate1976 - Present
Orange County Bar Associationmember1975 - Present
American Bar Asociationmember1970 - Present

Legal Cases
Case NameOutcome
"Clergy II"successful mediation

See all Legal Cases 

Publication NameTitleDate
The Orange County Lawyer, Vol. 43, No. &Metatag Cyber Theft2001
Western State Law Review, Vol. 14, No. 73Some Thoughts On The Avoidance of Extra-Contractual Damages1986

School NameMajorDegreeGraduated
Loras CollN/AundergraduateN/A
Loyola Univ SOLN/AlawN/A

Speaking Engagements
Conference NameTitleDate
Masters in TrialCross Examination2007