GISS International


A Full-Service Security Company You Can Depend On

Get a Complimentary On-Site Security Evaluation!

More than your average security guard company

The principles of GISS International can point to over 50 years of industry experience contracting with well-known and respected organizations that demand a competitive level of performance. In a chaotic world with increasing violence, GISS International stands ready to deliver tailored protection regardless of the time, location, industry, or service.

Services available in over 17 languages!

Our Services

GISS International is more than just a licensed security guard agency. We provide a variety of services to our clients ranging from armed and unarmed security guards, to training & concierge services. All while proudly serving New York, New Jersey, including Manhattan, Brooklyn, Bronx, Queens, Staten Island, Northern New Jersey, Central New Jersey, Southern New Jersey, and more.

Industries we serve

Our professional security services are applicable to a number of different industries. With our large network, we are able to accommodate the needs of any client, but we have specialized knowledge in the following industries where various types of security come into play.

And much more...

A full range of security services for everyday needs

When it comes protecting of the ones you love or the business you’ve worked so hard to build, it’s important to have the best and most trustworthy agency in your corner.

Have questions about our services?

At GISS International, we have you covered. Request a quote for a complimentary on-site evaluation to find out how we can protect you and yours from any harm.

What our clients say

I have had the pleasure of using Olivier DeLaurentiis and his security services on several different occasions. In every situation, whether it is public or private, he has always come prepared and conducted himself and his operation in a very professional manner. It is my pleasure to recommend his company and his services.
Robert Gottlieb
William Morris Agency
I would like to offer this letter of recommendation for GISS International. Due to the sale of the Helmsley Windsor Hotel, it had become necessary to engage an impartial, outside security firm to secure the assets of the hotel for the new owner. Mr. Olivier DeLaurentiis and his team of professionals, not only provided outstanding security services, but also performed in such a way as to blend in with my team of hospitality experts. Mr. DeLaurentiis went well beyond the expected scope of responsibility. He ensured that not only were the physical assets protected, but also the well-being and comfort of my guests were insured in the final days. I have only high praise and gratitude for the services rendered by GISS International.
Donna Soba
General Manager, Helmsley Windsor Hotel

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