Blog > Southampton family businesses with decades of local history

Southampton family businesses with decades of local history

November 9, 2026 · By AdfasTy

Some of the businesses in Southampton's directory have been serving their neighbors for longer than many of us have lived here. Here are the ones whose AdfasTy listings tell that story — in their own words.

Leo's Electric Corporation — since 1976

Leo's Electric Corporation was started by Charles Leo and is now run by his son Anthony, with a third generation, Chazz Leo, joining the business. It describes itself as offering small-town customer service with the experience of a national company.

Briscoe Protective — since 1978

Briscoe Protective on County Road 39 specializes in approved fire alarm systems and integrated security, including inspections, design, engineering, central station monitoring, access control and CCTV, for building owners and managers across Long Island, New York City's five boroughs and now Westchester.

Inter-Science Research Associates — since 1980

From its office in the historic Village of Southampton, Inter-Science Research Associates, Inc. has provided land use planning and environmental services across the East End, including impact analysis, wetlands mapping and permits, and environmental design.

Grealish Tree Service — since 1982

Grealish Tree Service has served the entire East End since 1982 and names attention to detail and customer service as its top priorities.

Suffolk Designer Lighting — in Southampton since 1985

Bill and Dolores Kreitsek opened Suffolk Designer Lighting in Riverhead more than 40 years ago and opened the Southampton store in 1985. Today Designer Lighting Inc on County Road 39A stocks fixtures from more than 450 manufacturers in an 8,000 square foot showroom and works with architects, designers, builders and electricians. It is still a closely held family business.

One Source Tool Supply — since 1991

One Source Tool Supply Inc on County Road 39A sells and repairs tools, rents equipment and offers delivery.

Ocean Electric Corp. — since 1993

Jeffrey DiLandro founded Ocean Electric Corp. in 1993 after a decade in the electrical contracting industry. It is run by Jeff, his family and team.

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