Judge John J. Leo - Professional Background & Legal Expertise

Biography

The Hon. John J. Leo is a Justice of the Suffolk County Supreme Court in the Tenth Judicial District of New York. He was elected to the bench in 2013.

He is a registered Democrat.

Justice Leo received his B.A. from Fordham University in 1976. He also holds an M.B.A. in finance and accounting from New York Graduate School of Business and a J.D. from Fordham University School of Law (1981).

Before joining the bench, Leo worked in private practice as an attorney at the law firm Manning, Raab, Dealy, and Sturm as well as a solo practitioner at his own law firm. During his tenure in private practice, he handled matters involving labor-management relations, collective bargaining, arbitration, civil litigation, civil RICO, real estate, trust and estates, and election law.

In 2002, Leo began serving as a town attorney for the Town of Huntington in Suffolk County.

While on the Supreme Court bench, Justice Leo has presided over a Dedicated Matrimonial Part and a Tax Certiorari Part.

Recent Cases by Hon. John J. Leo

Lauren Klotsche v. Christopher Klotsche

On February 28, 2024 a matrimonial - contested case was filed in the jurisdiction of Suffolk County. Judge John J. Leo presiding.

Filed

Feb 28, 2024

Status

Active

Judge

Hon. John J. Leo 👉 Discover key insights by exploring more analytics for John J. Leo

Court

Supreme

County

Suffolk County, NY

Case #

(Subscribe to View)

Category

Matrimonial - Contested

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Apr 29, 2024

Town Of Brookhaven v. Karen Cannella, John Doe No. 1 through John Doe No. 5

On November 21, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo (Tax) presiding.

12 Files

Filed

Nov 21, 2023

Status

Active

Judge

Hon. John J Leo (Tax)

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Property

Matter Type

Eminent Domain

Case Last Refreshed

Jan 28, 2024

Fatma Kurun v. Sener Kurun

On November 5, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Nov 05, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 31, 2024

Town Of Brookhaven v. Pedro Diaz, John Doe No. 1 Through John Doe No.5

On October 25, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo (Tax) presiding.

12 Files

Filed

Oct 25, 2023

Status

Active

Judge

Hon. John J Leo (Tax)

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Property

Matter Type

Eminent Domain

Case Last Refreshed

Jan 25, 2024

Susanne Schmidt v. Scott Schmidt

On September 12, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Sep 12, 2023

Status

Closed

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Sep 15, 2023

Louis Tomeo v. Barbara Tomeo

On August 31, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

7 Files

Filed

Aug 31, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Property

Matter Type

General Property

Case Last Refreshed

Jan 25, 2024

Evan Defrancesco v. Andrew Defrancesco

On August 31, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 31, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Sep 02, 2023

Frank Darras v. Helen Darras

On August 18, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 18, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Aug 24, 2023

Sandi Shroyer v. Robert Shroyer

On August 17, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 17, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 29, 2024

Julia Mika v. Richard Mika

On August 16, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 16, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Dec 19, 2023

Town Of Brookhaven v. Joan S. Liebegott, John Doe No. 1 through John Doe No. 5

On August 16, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo (Tax) presiding.

13 Files

Filed

Aug 16, 2023

Status

Active

Judge

Hon. John J Leo (Tax)

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Property

Matter Type

Eminent Domain

Case Last Refreshed

Oct 24, 2023

Diane Mckenna v. Lawrence Mckenna

On August 16, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 16, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 25, 2024

Town Of Brookhaven v. Eileen Bartley, John Doe No. 1 through John Doe No. 5

On August 16, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo (Tax) presiding.

12 Files

Filed

Aug 16, 2023

Status

Active

Judge

Hon. John J Leo (Tax)

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Property

Matter Type

Eminent Domain

Case Last Refreshed

Oct 24, 2023

xxxxxx xxxxxxx O/B/O xxxx xxxxx xxx xxxxxx v. For Leave To Change Her Name To xxxx xxxxx xxxxxxx

On August 9, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

11 Files

Filed

Aug 09, 2023

Status

Other

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Name Change

Case Last Refreshed

Jan 28, 2024

Cheryl Ann Sivacek v. Milan Michael Sivacek

On August 3, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Aug 03, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Nov 29, 2023

Alicia Kelly v. Thomas J Kelly

On July 31, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Jul 31, 2023

Status

Transfer

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 28, 2024

William Demilt Jr. v. Nancy Demilt

On July 28, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Jul 28, 2023

Status

Settlement

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Oct 24, 2023

Alexander Guasp v. Shania Guasp

On July 26, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Jul 26, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Oct 23, 2023

Lisa Hailey v. John Joseph Hailey

On July 26, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Jul 26, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Feb 01, 2024

Maria M Greco v. Timothy T Greco Sr

On July 24, 2023 a case was filed in the jurisdiction of Suffolk County. Judge John J Leo presiding.

Filed

Jul 24, 2023

Status

Active

Judge

Hon. John J Leo 👉 Discover key insights by exploring more analytics for John J Leo

Court

Suffolk County

County

Suffolk County, NY

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Feb 01, 2024

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About

John J. Leo
Current Appointment 10th Judicial District - Suffolk County Supreme Court, Department Part 51	10th Judicial District - Suffolk County Supreme Court, Department Part 51
Education B.A., Fordham University - 1976 M.B.A., New York Graduate School of Business J.D., Fordham University School of Law - 1981	B.A., Fordham University - 1976 M.B.A., New York Graduate School of Business J.D., Fordham University School of Law - 1981

Documents related to John J. Leo

Court Info

Court Info
Current Court:	NY - 10th Judicial District - Suffolk County Supreme Court
Clerk phone:	+1 (631) 852-2334
Principal Law Clerk:	+1 (631) 208-5654
Secretary:	+1 (631) 208-5653
Fax:	+1 (631) 853-4844

Career History

Career History
Role	Employer	Where
Attorney	Manning, Raab, Dealy, and Sturm	New York County, New York
Sole Practitioner	Law Office of John J. Leo	Suffolk County, New York
Town Attorney	Town of Huntington	Suffolk County, New York