Security Investigation Services locations near Cold Spring Harbor, NY

Showing 1–10 of 10 results

Our Cold Spring Harbor, NY directory covers 10 security investigation services listings in 6 ZIP codes. Listings here were last checked in Sep 2026.

All Private Investigations

Security Investigation Services

📍 8 Manor Rd, Smithtown, NY, 11787

📞 631-759-1414

"We’re committed to providing you with the finest private investigator services in the industry. Our private detective will approach every job with a focus on integrity, discretion and thoroughness. We represent your interests in a professional manner. Our former NYPD Detectives provide armed Executive Protection for high profile individuals and their families. Available 24/7 as drivers, in your residence and while traveling. Our company has a well-deserved reputation of excellence in providing experienced private investigators. Professional private detectives at affordable rates."

Donovan's Investigation's Bureau

Security Investigation Services

📍 1 Sydney St, Plainview, NY, 11803

📞 516-935-9112

Updated Sep 2026

Vanson Investigations

Security Investigation Services

📍 54 Sunnyside Blvd Ste J, Plainview, NY, 11803

📞 516-575-3977

🌐 vansonpi.com

Vanson Investigations is a security investigation service located in Plainview, New York. The business has an active online presence as of 2026, indicating ongoing operations. Clients in the area can seek assistance with various investigative needs.