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About Me

Since 1977, my practice consisted of representing and assisting people and businesses in all matters, including public and private corporations, on both a civil and criminal level. My services have included public offerings, proxy fights, securities regulation, all phases of civil and criminal litigation, family law, estate law, guardianships, negotiation and drafting of a wide variety of agreements and transactions, in addition to general advice with regard to the customs and practices within various industries. I was also a Guest Commentator on COURT TV and an arbitrator. I am admitted to practice in New York and the federal courts, Southern and Eastern District, as well as the Second Circuit Court of Appeals.


Currently, I am special counsel to law firms in Los Angeles and New York, as well as operating my own office in Nassau County. When possible, I regularly perform pro bono work for the Volunteer Lawyers Project, Nassau/Suffolk Law Services, Inc. and the NYS Unemployment Insurance Appeals Board. I am also a member of the LAP Committee of the Nassau County Bar Association. I have several websites of interest:

1. A blog that discusses common legal problems which you can visit at

2. A Facebook page which you can visit at and a Facebook Group NASSAU COUNTY - LEGAL ISSUES THAT EFFECT RESIDENTS OF LONG ISLAND


3. A LinkedIn page which you can visit at  


4. Follow his discussions on Twitter at


If you need help, I would be pleased to hear from you! Please let me know what your needs and questions are, I will be more than happy to assist you. You can reach me at 1 888 795-4555 and by fax at 212 802-6498. You can also contact me at my e-mail address:


As a lawyer, my goal is for my clients to value my honesty and trustworthiness in handling their priority is to help you. Some cases can be taken on a pro bono basis. My office is located at 21 Turn Lane, Levittown, New York 11756


Pursuant to 22 NYCRR 1200.50 (f) and (k), this and the other web sites may be deemed an "Attorney Advertising".



Photos and Videos

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Practice Areas


  1. Employee Benefits: 50%
    9 years, 25 cases
  2. Divorce & Separation: 25%
    36 years, 25 cases
  3. Landlord & Tenant: 10%
    39 years
  4. Child Support: 5%
    11 years, 5 cases
  5. Other: 10%
  6. More 



Hourly ($100-300/hour), Fixed (Sometimes), Free Consultation (30 minutes), Pro Bono (15%)

Attorney Endorsements

3 total 

  • Blaire Pamela Fellows

    A highly regarded employee benefits attorney!


    Blaire Fellows Estate Planning Attorney
    Relationship: Fellow lawyer in community

  • Barry J. Gross

    I endorse this lawyer. Jon is a talented lawyer with deep and varied experience. He truly cares for his clients.


    Barry Gross Divorce & Separation Attorney
    Relationship: Worked together on matter

Contact Info

Law Offices of Jon Michael Probstein

21 Turn Lane
Levittown, NY, 11756



NYCurrently registered 197703/13/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Thomas Maligno Pro Bono Attorney of the YearNassau County Bar Association2015
Pro Bono Attorney of the MonthNassau County Bar Association2012
Work Experience
TitleCompany NameDuration
PartnerProbstein & Weiner1988 - 2005
PartnerProbstein & Napolitano1982 - 1988
AssociateGraubard, Moskovitz, McGoldrick, Dannett & Horovitz1980 - 1982
AssociateBerman & Zivyak1979 - 1980
AssociateMarchi, Jaffe, Cohen, Crystal & Mintz1977 - 1979
Instructor Legal ResearchCardozo Law School1976 - 1977
Association NamePosition NameDuration
Nassau County Bar AssociationN/A2009 - Present
American Bar AssociationN/A1977 - Present
New York State Bar AssociationN/A1977 - Present
Legal Cases
Case NameOutcome
USA v. Vila et al., 588 F2d 21 (2nd Cir. 1979)N/A
Industrial Consultants, et al v. H.S. Equities et al., 646 F2d 746 (2nd Cir. 1981)N/A
Oboler v. Goldin, 714 F2d 211 (2nd Cir. 1983)Judgment affirmed.
See all Legal Cases 
Publication NameTitleDate
St. John's Law ReviewCPLR 1005: Court of Appeals Liberalizes Availability of Class Action1975
School NameMajorDegreeGraduated
St John's University School of LawLawJD - Juris Doctor1976
Syracuse UniversityPsychologyBA - Bachelor of Arts1973
Speaking Engagements
Conference NameTitleDate
Wellness SeminarLawyers Under Impairment2015