Gary W. O'Sullivan's obituary , Passed away on October 27, 2025 in Deer Park, New York
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Gary W. O'Sullivan

August 15, 1945 - October 27, 2025 (80 years old)

Deer Park, New York

Gary W. O'Sullivan's obituary , Passed away on October 27, 2025 in Deer Park, New York
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Funeral arrangement under the care of
Mangano Funeral Home, Inc.

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Gary W. O'Sullivan

August 15, 1945 - October 27, 2025 (80 years old)

Deer Park, New York

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Gary W. O'Sullivan Obituary

We are sad to announce that, on October 27, 2025 we had to say goodbye to Gary W. O'Sullivan in Deer Park, New York, born in Queens, New York. You can send your sympathy in the guestbook provided and share it with the family.

He was predeceased by: his parents, Timothy O'Sullivan and Anita O'Sullivan; and his brother Edward. He is survived by: his daughters, Kimberly Acquista (Joseph) and Karen Seifert (Justin); his grandchildren, Emily, Ana, Mia, Nicholas and Joseph; his wife Joanne; and his brother Richard O'Sullivan.

IN LIEU OF FLOWERS THE FAMILY ASKS THAT YOU PLEASE DONATE TO ALZHEIMER'S: https://events.alz.org.

Funeral arrangement under the care of
Mangano Funeral Home, Inc.

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500 CHARACTERS

Events

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Wed

Oct 29

Visitation

Deer Park - Mangano Family
1701 Deer Pk Ave, Deer Park, NY 11729

Thu

Oct 30

Mass

Saints Cyril & Methodius R.C. Church
125 Half Hollow Rd, Deer Park, NY 11729

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