Diefenbach, PLLC

Gordon Diefenbach


Diefenbach, PLLC

Contact Information

917-734-7111, gordon@diefenbachlaw.com


Gordon Diefenbach started Diefenbach, PLLC, after years as a trial lawyer for some of the top litigation firms in New York City, Martin Clearwater & Bell to name just one. His field of expertise is civil litigation since 1986.

A graduate of Cornell University, B.A. in 1983, he then obtained his J.D. from the University at Buffalo, Faculty of Law & Jurisprudence, S.U.N.Y. in 1986. He is admitted to the bar of the State of New York, as well as admitted to practice before the United States District Courts for the Southern and Eastern Districts of New York, and the Court of Appeals for the Second Circuit. In 1999, he was sworn in by Chief Justice William Rehnquist to argue cases before the United States Supreme Court.

With over 25 years of courtroom battles as a trial lawyer, Mr. Diefenbach has actively litigated hundreds of cases in New York, as well as New Jersey and Connecticut. In his long career as a trial lawyer, he has made literally thousands of court appearances in civil court throughout the Supreme Courts of New York City’s five boroughs, as well as Nassau County, Suffolk County and Westchester County.

In 1989 he was one of the junior associates who defended New York Hospital-Cornell Medical Center against the Andy Warhol estate, which had sued the hospital for the medical malpractice and wrongful death of Andy Warhol during a routine gallbladder surgery at that hospital.

In 2003, on another major case, he was hired to do extensive research and appellate practice for a trial lawyer who had successfully obtained a $55 million verdict against the insurer Lloyd’s of London.

In 2004 he was hired by a trial attorney who successfuly sued the City of New York in a police brutality case, where the latter obtained a jury verdict of $ 50 Million.

Mr. Diefenbach’s knowledge of trial tactics and litigation includes complex civil litigation and appeals in both Federal Courts and New York State Courts. He has significant appellate practice experience as well. Before establishing the Diefenbach, Armstrong Law Firm, he was routinely hired to do other law firm’s trials because of his significant and proven track record. He has been associated with top New York trial lawyers handling malpractice cases that go to trial.

His memberships in Bar Associations include the Federal Bar Association, the Federal Bar Council, the New York County Lawyers’ Association, the Brooklyn Bar Association, the Internet Society, and has been a member of the Association of the Bar of the City of New York (ABCNY). In 1998 he was nominated to become a member of the ABCNY’s Committee on Central and Eastern European Affairs.

Diefenbach, PLLC
888 Seventh Avenue
6th Floor
New York, NY 10106

Areas of Law and Practice

Areas of Law Areas of Practice
Family Law Adoptions, Agency Adoptions, Alimony, Annulment, Assisted Reproductive Technology, Child Abduction, Child Abuse and Neglect, Child Advocacy, Child Care, Child Custody, Child Custody Mediation, Child Dependency, Child Protection, Child Sexual Abuse, Child Support, Child Welfare, Childrens Rights, Civil Unions, Cohabitation Agreements, Collaborative Family Law, Community Property Law, Day Care, Divorce, Divorce Arbitration, Divorce Mediation, Divorce Taxation, Domestic Partnerships, Domestic Relations, Domestic Torts, Domestic Violence, Equitable Distribution, Family Arbitration, Family Mediation, Fathers Rights, Foster Care, Gay and Lesbian Family Law, Grandparents Custody, Grandparents Visitation Rights, Independent Adoptions, International Adoptions, International Child Abduction, International Child Custody, International Family Law, Interstate Adoptions, Interstate Child Custody, Interstate Support, Juvenile Criminal Law, Juvenile Dependency, Juvenile Delinquency, Juvenile Law, Legal Separation, Marital Agreements, Marital Property Distribution, Marital Property Law, Marital Property Settlements, Matrimonial Bankruptcy Law, Matrimonial Law, Military Divorce, Name Changes, No Fault Divorce, Non-Traditional Family Law, Orphans Court Practice, Palimony, Parental Kidnapping, Parental Rights, Parenting Time, Paternity, Post Divorce Modification, Postnuptial Agreements, Premarital Agreements, Private Adoptions, Qualified Domestic Relations Orders, (QDROs), Restraining Orders, Same Sex Marriage, Spousal Support, Step Parent Adoptons, Surrogacy Law, Termination of Parental Rights, Third Party Custody, Uncontested Divorce, Visitation Rights


  • New York

Employment History

  • Partner | Diefenbach, PLLC

    1991 -

    We are the go-to firm when you need legal representation in New York State’s divorce courts and Family Courts in Manhattan, Queens, Brooklyn, Staten Island, Westchester, Nassau and Suffolk Counties.

    Our business cell phone is on 24 hours a day, 7 days a week @ (917) 734-7111. We guarantee a telephone consultation with a lawyer at the time you call or, at most, within hours of your call.

    The Diefenbach firm is comprised of NYC divorce lawyers best known for their strong strong matrimonial and civil litigation practices. We are located in the heart of the Wall Street financial district in the New York Information Technology Center. Lawyers and staff are routinely selected from Ivy League schools with large law firm backgrounds and consistently hired from the top 10 law schools and universities. Gordon Price Diefenbach is widely regarded by clients as a talented trial lawyer, having made not hundreds, but rather thousands, of courtroom appearances and has been associated with top New York divorce and child custody lawyers who have significant expertise, as well as with top Manhattan custody attorneys to protect the best interests of your children.


  • J.D | University at Buffalo

    1983 - 1986

  • B.A | Cornell University

    1980 - 1983

Attorney Rating and Feedback

Publications and Presentations

No Publications

  • New York, New York, New York County

Get a Lawyer Now

Tired of searching?
Anonymously post your legal needs quickly and for free, and lawyers interested in helping you will contact you via email!