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Einhorn, Barbarito, Frost, Botwinick, Nunn & Musmanno, PC | The contents of this website contain attorney advertising. | Results may vary depending on your particular facts and legal circumstances.

Matheu D. Nunn is Co-Managing Partner of the Firm and serves as a Board Member of the Firm and on its four-person Executive Committee. He also co-chairs the Firm’s Family/Matrimonial Practice and co-chairs its general Appellate Practice. Certified by the New Jersey Supreme Court as a Matrimonial Attorney, Mat is also a Fellow of the American Academy of Matrimonial Lawyers.

Mat has a wide array of experience representing individuals from all fields, including but not limited to:  athletes, business owners, entertainers, executives, financial service providers, lawyers, physicians, police officers, and teachers—as well as the spouses of individuals in those fields. He also serves as an Arbitrator of family law matters for attorneys throughout the state.

A former county and municipal prosecutor, Mat is an experienced litigator who has handled jury and bench trials as well as appellate and Supreme Court cases involving criminal law, personal injury, estate, and administrative law issues. He has been counsel in more than 80 Appellate Division and Supreme Court matters, including precedent-setting family law decisions in Cardali v. Cardali, 255 N.J. 85 (2023) (cohabitation), Bisbing v. Bisbing, 230 N.J. 309 (2017) (child relocation), Quinn v. Quinn, 225 N.J. 34 (2016) (cohabitation), In re J.E.V., 226 N.J. 90 (2016) (adoption), and Clark v. Clark, 429 N.J. Super. 61 (App. Div. 2012) (financial malfeasance). Mat’s noteworthy victories have earned him numerous awards and recognitions, including three selections as a New Jersey Law Journal “Attorney of the Year” finalist (2017, 2018, and 2024), and the Essex County Bar Association’s Family Practitioner of the Year (2025).

Prior to joining Einhorn Barbarito, Mat clerked for the Morris County Assignment Judge, the Hon. B. Theodore Bozonelis, A.J.S.C. (ret.), and then at the Appellate Division for the Hon. Jack M. Sabatino, P.J.A.D.

No aspect of this advertisement has been approved by the Supreme Court of New Jersey. Click here to view the recognition methodology.

Honors & Accolades

Mat has been recognized by the following:

  • 2025 NJBIZ Law Power List
  • The Best Lawyers in America®
    • Family Law, 2019-2025
    • Appellate Practice, 2022-2025
  • Thomson Reuters, Super Lawyers®
    • New Jersey Super Lawyers: 2022-2025
    • New Jersey Rising Stars: 2013–2021
  • “Attorney of the Year” Finalist, New Jersey Law Journal, 2017, 2018, 2024
  • “Family Law Practitioner of the Year,” Essex County Bar Association, 2025
  • “40 Under 40,” NJBIZ, 2020
  • “Trailblazer” in Divorce, National Law Journal, 2017
  • “New Leaders of the Bar,” New Jersey Law Journal, 2015

Professional Affiliations

  • Fellow, American Academy of Matrimonial Lawyers, 2022-present
  • Member, Morris County Bar Association, 2012-present
  • Member, New Jersey State Bar Association, 2012-present
  • Member, New Jersey State Bar Association, Amicus Committee, 2018-present
  • Member, New Jersey State Bar Association, Family Law Executive Committee, 2022-present
  • Member, New Jersey State Bar Association, Legislative Committee, 2025-present
  • Member, New Jersey State Bar Association Appellate Practice Committee, 2013-2016
  • Editor, New Jersey Lawyer publication (New Jersey State Bar Association), 2024-present
  • Trustee, Morris County Bar Association, 2013-2017
  • Co-chair, Morris County Bar Association Family Law Committee, 2023-present

Community Involvement

  • Municipal Prosecutor, Morris Township, New Jersey, 2012-2015
  • Deputy Mayor/Committeeman, Morris Township, New Jersey, 2015-2018
  • Member, Morris Township Ethics Committee, 2012
  • Member, 200 Club of Morris County

Experience

Reported Decisions

  • Jersey Shore v. Dep. of Labor, 478 N.J. Super. 13 (App. Div. 2024), concluding that the DOL exceeded its authority and ruling in favor of court reporters’ argument that independent court reporters are not employees for purposes of unemployment compensation.
  • Facebook v. State, 254 N.J. 329 (2023), holding that the privacy interests of communications between Facebook messenger users require the more stringent wiretap surveillance application as opposed to a communications data warrant.
  • Cardali v. Cardali, 255 N.J. 85 (2023), reversing Appellate Division decision regarding cohabitation. The case followed more than 60 appeals about cohabitation in the preceding eight years.
  • Lapsley v. Sparta Twp., 249 N.J. 427 (2022), reversing Appellate Division decision regarding compensability of injuries suffered by employee in public parking lot.
  • Bisbing v. Bisbing, 468 N.J. Super. 112 (App. Div. 2021), holding that counsel fee award in husband’s favor was non-dischargeable in bankruptcy because they were in the “nature” of support and stemmed from custody proceedings.
  • Lapsley v. Sparta Twp., 466 N.J. Super. 160 (App. Div. 2021), holding that employee injury in parking lot was not covered by Worker’s Compensation Act.
  • State v. Andrews, 243 N.J. 447 (2020), in a 4-3 decision, concluding that compelled disclosure of cellular phone passcode did not violate Fifth Amendment privilege against self-incrimination.
  • Woytas v. Greenwood Tree Experts, Inc., 237 N.J. 501 (2019), modifying Appellate Division and concluding that outstanding financial obligations in a settlement agreement is not tantamount to the death benefit of life insurance that the decedent failed to maintain.
  • Bisbing v. Bisbing, 230 N.J. 309 (2017), reversing sixteen years of Supreme Court case law and now requiring all child relocation decisions to be guided by a “best interests” standard.
  • Quinn v. Quinn, 225 N.J. 34 (2016), reversing trial court and holding, in case of first impression, that Konzelman cohabitation provisions that terminate alimony are enforceable even after the “cohabitation” ends.
  • In re Child by J.E.V., 226 N.J. 90 (2016), requiring appointment of counsel for indigent parents in private adoptions.
  • Bisbing v. Bisbing, 445 N.J. Super. 207 (App. Div. 2016), reversing trial court that allowed children to be relocated to Utah.
  • In re Adoption of Child by J.E.V., 442 N.J. Super. 472 (App. Div. 2015), requiring appointment of counsel for indigent parents in private adoptions.
  • Clark v. Clark, 429 N.J. Super. 61 (App. Div. 2012), reversing trial court award of alimony to wife from husband where wife embezzled from husband’s business.

Unreported Decisions

  • State v. Noel, No. A-1955-23 (App. Div. 2024)
  • In re N.C.S., No. A-3072-22 (App. Div. 2024)
  • K. v. L.K., No. A-3046-23 (App. Div. 2024)
  • G. v. D.G., No. A-3638-211 (App. Div. 2024)
  • P. v. D.P., No. A-3302-21 (App. Div. 2024)
  • T. v. A.S.A., No. A-1860-22 (App. Div. 2024)
  • Utlik v. Utlik, A-0935-22 (App. Div. 2024)
  • Macri v. Fatovich, A-3143-20 (App. Div. 2024)
  • Battle v. Algee, A-3658-21 (App. Div. 2024)
  • Triantos v. Triantos, A-3051-22 (App. Div. 2023)
  • Kiejdan v. Kiejdan, A-2945-20 (App. Div. 2023)
  • B.C.P. v. D.W.P., A-2778-21 (App. Div. 2023)
  • Petrongolo v. Alves, A-1095-21 (App. Div. 2022)
  • A.A. v. I.A., A-2209-20 (App. Div. 2022)
  • Cardali v. Cardali, A-1624-20 (App. Div. 2022)
  • Eisenger v. Herman, A-3782-19 (App. Div. 2022)
  • Lapsley v. Sparta Twp., 249 N.J. 427 (2022)
  • A.K.S. v. M.V.M., A-1982-19 (App. Div. 2021)
  • M.S. v. M.A.S., A-2817-19 (App. Div. 2021)
  • S.G. v. A.G., A-5394-18T2 (App. Div. 2021)
  • Molloy v. Molloy, A-2370-18T3 (App. Div. 2020)
  • Mendoza v. Shim, A-0917-18T1 (App. Div. 2020)
  • S. v. D.J.S., A-0574-17T4, 2019 WL 2233496 (App. Div. May 23, 2019)
  • S. v. M.A.S., A-3937-17T3, 2019 WL 2000556 (App. Div. May 7, 2019)
  • C. v. J.C., 2019 WL 470068 (App. Div. February 7, 2019)
  • S. v. S.J.S., 2018 WL 6494391 (App. Div. December 11, 2018)
  • M.O. Adoption of a Child by J.E.V., 2018 WL 4611139 (App. Div. September 26, 2018)
  • M.O. Adoption of a Child by R.C.W., 2018 WL 3732739 (App. Div. August 7, 2018)
  • Cynar v. Cerefice, 2018 WL 3732816 (App. Div. August 7, 2018)
  • Abdelkader v. Hosny, 2018 WL 3579897 (App. Div. July 26, 2018)
  • State v. Gardner, 2018 WL 3484100 (App. Div. July 20, 2018)
  • Woytas v. Greenwood Tree Experts, Inc., 2018 WL 3404123 (App. Div. July 13, 2018)
  • S. v. A.S., 2016 WL 1229116 (App. Div. March 30, 2016)
  • Yannuzzi v. Yannuzzi, 2015 N.J. Super. Unpub. LEXIS 1904 (App. Div. 2015)
  • Clark v. Clark, 2014 N.J. Super. Unpub. LEXIS 895 (App. Div. 2014)
  • Alexin v. Raiter, 2014 N.J. Super. LEXIS 826 (App. Div. 2014)
  • State v. Baum, 2013 N.J. Super. Unpub. LEXIS 1920 (App. Div. 2013)
  • G. V. A.G., 2013 N.J. Super. Unpub. LEXIS 1496 (App. Div. 2013)
  • M.F. v. G.M.F., 2013 N.J. Super. Unpub. LEXIS 1063 (App. Div. 2013)
  • Decheser v. Decheser, 2013 N.J. Super. Unpub. LEXIS 1339 (App. Div. 2013)
  • Lenowitz v. Lenowitz, 2012 N.J. Super. Unpub. LEXIS 2605 (App. Div. 2012)
  • State v. J.C., 2012 N.J. Super. Unpub LEXIS 1989 (App. Div. 2012)
  • State v. Williams, 2012 N.J. Super, Unpub. LEXIS 1118 (App. Div. 2012)
  • State v, Tillery, 2012 N.J. Super. Unpub LEXIS 761 (App. Div. 2012)
  • State v. Maclay, 2012 N.J. Super. Unpub. LEXIS 369 (App. Div. 2012)
  • State v. Zarate, WL 246385 (App. Div. 2012)
  • State v. Bisco, WL 2582732 (App. Div. 2011)
  • State v. Pomento, WL 1191558 (App. Div. 2011)
  • State v. Brackin, WL 1661381 (App. Div. 2011)
  • State v. Nguyen, 205 N.J. 80 (2011)
  • State v. Quigley, WL 903444 (App. Div. 2011)
  • State v. Usher-Swift, WL 941162 (App. Div. 2011)
  • State v. Vaughn, 205 N.J. 79 (2011)
  • State v. Worthy, WL 2306904 (App. Div. 2011)
  • State v. Ameti, WL 2557501 (App. Div. 2010)
  • State v. Bevacqua, WL 2346684 (App. Div. 2010)
  • State v. Carrasquillo, WL 532784 (App. Div. 2010)
  • State v. Correia, WL 4067032 (App. Div. 2010)
  • State v. Dilavore, WL 4008131 (App. Div. 2010)
  • State v. J.E.J., 203 N.J. 438 (2010)
  • State v. O’Leary, WL 2195677 (App. Div. 2010)
  • State v. O’Leary, 204 N.J. 41 (2010)
  • State v. Toffoloni, WL 680774 (App. Div. 2010)
  • State v. Culpepper, WL 3849922 (App. Div. 2009)

Results may vary depending on your particular facts and legal circumstances.

Speaking Engagements

  • Moderator, “Tax Issues under the New Administration” (2025, Withum/AAML)
  • Panelist, “Alimony and Tax Issues” (2025, NSJBA Family Law Symposium)
  • Moderator, “Seminar with Justices Patterson, Wainer Apter, Noriega, and Judges Sabatino and Whipple” (2024, Morris County Bar Association)
  • Panelist, “Savings (and How to Compute Them)” (2024, American Academy of Matrimonial Lawyers)
  • Panelist, “Alimony Amendments—10 Years Later” (2024, NSJBA Family Law Symposium)
  • Panelist, “Cohabitation Issues” (2023, Burlington County Bar Association)
  • Panelist, “Custody and Relocation Seminar” (2023, NJICLE)
  • Panelist, “Cohabitation Seminar” (2023, NJICLE)
  • Panelist, “Legalpalooza: Family Law Hot Tips” (2022, Morris County Bar Association)
  • Panelist, “Financial Implications of Divorce – Part 2” (2022, Nisivoccia LLP)
  • Panelist, “Financial Implications of Divorce – Part 1” (2022, Nisivoccia LLP)
  • Panelist, “Evidence for Family Law Attorneys with the Hon. Jack Sabatino, P.J.A.D.” (2021, Bergen County Bar Association)
  • Panelist, “Family Law Experts and Implicit Bias” (second presentation) (2021, NJICLE)
  • Panelist, “Family Law: Hot Tips in 2021” (2021, Morris County Bar Association)
  • Panelist, “Family Law Experts and Implicit Bias” (2021, NJICLE)
  • Panelist, “Family Law: Hot Tips in 2020” (2020, Morris County Bar Association)
  • Panelist, “Intrastate and Interstate Relocation – The Aftermath Of Bisbing, How To Shape Our Intrastate Relocations Laws, and An Arial View Of How Other States Address Intrastate Relocation Laws” (2020, NJICLE)
  • Panelist, “Child Custody Basics: Everything You Need to Handle Child Custody Matters in 2019” (2019, NJICLE)
  • Moderator, “Family Law Appeals with Supreme Court Justices Jaynee LaVecchia and Anne M. Patterson and Appellate Division Judges Jose L. Fuentes, Mary Catherine Cuff (ret.), and Marie E. Lihotz (ret.)” (2018, NJICLE)
  • Panelist, “’He Said, She Said’ and ‘I think…’:  How Mental Health Professionals Come to Conclusions When Doing Assessments in Family Law Cases with Hon. Hany Mawla, J.A.D. and Hon. Peter Bogaard, J.S.C.” (2017, NJSBA)
  • Panelist, “Bisbing and Child Relocation with Hon. Maritza Berdote-Byrne, P.J.F.P.” (2017, Morris County Bar Association)
  • Panelist, “Relocation and Your Custody Case in Light of Supreme Court Opinion – Bisbing v. Bisbing” (2017, NJAJ)
  • Panelist, “Bisbing v. Bisbing with Judge Michael Casale, J.S.C. (ret.)”  (2017, The Justice Virginia Long Family Law American Inn of Court)
  • Panelist, “Preparing and Appearing Before the New Jersey Appellate Division with Judge Jack M. Sabatino, P.J.A.D.” (2017, NJAJ)
  • Panelist, “Evidence for Family Lawyers with Judge David H. Ironson” (2017, NJICLE)
  • Panelist, “Cohabitation Seminar with Judge Michael E. Hubner” (2016, Morris County Bar Association)
  • Moderator, “Appellate Seminar with Supreme Court Justice Virginia Long (ret.), Judge Phillip S. Carchman (ret. and on recall), Judge Catherine I. Enright, and Bonnie Frost” (2014, Morris County Bar Association)
  • Moderator, “Appellate Seminar with Supreme Court Justice Anne M. Patterson, Judge Francine I. Axelrad, Judge Jack M. Sabatino, and Judge Edwin H. Stern (ret.)” (2014, Morris County Bar Association)
  • Moderator, “Appellate Seminar with Supreme Court Justice Patterson, Judge Axelrad, Judge Sabatino, and Judge Stern (ret.)” (2013, Morris County Bar Association)
  • Panelist, “Hot Tips for Family Lawyers” (2012, NJICLE)
  • Keynote Speaker, (2012, Hispanic Chamber of Commerce)
  • “Privacy Issues in Family Law” (2011, Somerset County Bar Association)
  • “Privacy Issues in Family Law” (2011, NJICLE)
  • “Keynote Address” (2011, Morris County Police Academy)
  • Panelist, “The Infrequent Fliers Program – Doing it Right on Appeal” (2011, New Jersey State Bar Association Convention)

Published Articles

  • “Options, NSOs, ISOs, RSUs—Make it Make Sense,” New Jersey Law Journal (May 2025)
  • “Emancipation as to One Parent—Is It Permissible?,” New Jersey Law Journal (March 2025)
  • “Phantom Income/Retained Earnings and the Potential for Inflated Support,” New Jersey Law Journal (February 2025)
  • “Legal Implications in Religious Contexts: Navigating Gets,” New Jersey Law Journal (December 2024)
  • “Court Rules and Statutes Apply to Pendente Lite Custody Decisions,” New Jersey Law Journal (November 2024)
  • “Splitting the Baby Never Works,” New Jersey Law Journal (August 2024)
  • “A Look Ahead: The Future Impact of Recent Legislation,” New Jersey Family Lawyer (2024)
  • “Retirement, Alimony and the Equitable Distribution ‘Double Dip’,” New Jersey Law Journal (February 2024)
  • “Effective Cross-Examination and Use of Evidence Rules in Family Law Cases,” New Jersey Family Lawyer (2024)
  • “Parental Alienation: Psychological ‘Syndrome’ or ‘Junk Science’?,” New Jersey Law Journal (December 2023)
  • “Cohabitation Frustration No More: New Ruling Clarifies the Prima Facie Burden,” New Jersey Law Journal (August 2023)
  • “Getting a Get—An Alternate Avenue for Relief,” New Jersey Law Journal (March 2023)
  • “Temple Of Doom: The Prima Facie Showing of Cohabitation Remains a Mystery,” New Jersey Law Journal (December 2022)
  • “Family Law Firsts: Your First Case Involving a Business Valuation,” New Jersey Law Journal (October 2022)
  • “Lying Litigants: The ‘Extrinsic Evidence’ Amendments to N.J.R.E. 608 Should Apply to Family Cases,” New Jersey Law Journal (July 2022)
  • “Protocol to Determine the Competency of a Child Witness,” New Jersey Family Lawyer (2022)
  • “Setting Aside Default Judgment in the Family Part is No Vacation,” New Jersey Law Journal (April 2022)
  • “The Not-So ‘New’ Alimony Statute: Retroactivity Questions Remain Unanswered,” New Jersey Law Journal (January 2022)
  • “Use Of GPS Devices In Family Matters: Spies, Lies, TROs And Crimes,” New Jersey Law Journal (2021)
  • “Reliance on a Guardian Ad Litem in Custody Cases May Do More Harm than Good,” New Jersey Law Journal (September 2021)
  • “Common Evidence Issues in Family Trials (Part II): The Rules Still Apply,” New Jersey Law Journal (June 2021)
  • “Common Evidence Issues in Family Part Trials: Yes, the Rules Apply,” New Jersey Law Journal (March 2021)
  • “Cohabitation Frustration: A Primer on Prima Facie,” New Jersey Law Journal (January 2021)
  • “Seeking Injunctive Financial Relief in the Family Part: Eating (and Digesting) ‘Crowe’,” New Jersey Law Journal (November 2020)
  • Co-author, “Child Relocation: Case Law, Social Science and Practice Implications,” Journal of the American Academy of Matrimonial Lawyers (2020)
  • “Till Death Do Us Part, Unless I Need to Sue Your Estate,” New Jersey Law Journal (July 2020)
  • Co-author, “‘Bisbing’ Evens the Playing Field in Child Relocation Cases,” New Jersey Law Journal (September 2017)
  • “Your Marital Settlement Agreements Really Are Enforceable,” New Jersey Law Journal (June 2016)

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