Address32 Heckel St. Belleville, NJ 07109
Call us973-302-5550

Security SystemsChallenge

Critical security solutions customized to your facility.

Design & IntegrationAutomated

Completely synergize resource taxing relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust idea customer service.

Fire Alarms

Completely synergize resource taxing relationships via premier niche markets. Professionally cultivate one-to-one customer service with robust idea customer service.


Underdog has extensive expertise in designing high quality, commercial and residential Fire alarm, intrusion detection, video surveillance and access control systems.

New Design & Installation

Our professional installers are manufacturer trained and completely familiar with the equipment they’re installing which ensures the job will be done right the first time.

Service &

Underdog offers prompt, reliable system maintenance and service. Contact us to learn more about our flexible preventative maintenance agreement.


Underdog offers superior security Systems supported by professional monitoring services. Our system features technologically advanced cellular monitoring that enables fast and reliable two-way communication with our Five Diamond Monitoring Station.

Intrusion Detection

Once an attack is identified or abnormal behavior is observed, the alert can be sent to the administrator.

Video Systems

Quickly coordinate e-business applications through revolutionary catalysts for change. Seamlessly underwhelm optimal testing procedure processes.

Fire Alarm Systems

Dramatically disseminate standardized metrics after resource-leveling processes. Objectively pursue diverse catalysts for change for interoperable meta-services.

System Design & Installations

Dramatically engage high-payoff infomediaries rather than client-centric imperatives. Efficiently initiate world class applications after centric infomediaries.

Fastest growing Fire & Security company in the Tri-State area.

Underdog Fire & Security, as the name says, Fear the Dog! Our mission is to make each and every one of our clients feel confident and secure in their homes or businesses. With only top-quality cameras at our disposal, rest assured that we’ve got you covered. At Underdog Fire & Security we are committed to building a safer world.

Underdog Fire & Security is a full-service security company. We offer comprehensive security services in both commercial and residential contexts. Our experts think outside-the-box to create solutions that are tailored to you.

Harry San Martin, Owner


Security Systems Integrations

Currently located 10 miles outside of Manhattan, in Belleville, NJ. We consider our clients and employees to be a part of our extended family. We specialize in commercial, residential and industrial applications and are growing exponentially. We are not only able to service the New Jersey area, but also New York & Pennsylvania as welll.

Diverse Solutions

At Underdog Fire & Security , we provide the peace of mind that comes from knowing that your home or business is secure. We offer a wide range of state-of-the-art systems and solutions to keep your staff members and clients safe. Our commercial security solutions also work to protect your investments.
In addition to commercial security systems, we also provide fire alarm systems and video surveillance systems. Our team works hard to meet all of our clients’ residential and commercial security needs.
PresidentHarry San Martin
Vice PresidentJason Tielve

Interested in a career at Underdog Fire & Security?

Simply fill out the Careers form and we will contact you as soon as possible.

Customizable Security Solutions

You should not have to worry about the safety of your home or business. We provide monitoring and security systems, including remote monitoring. The powerful tools we offer ensure that you can oversee your home or business, even when you are away.
Exceptional ServiceUnderdog Fire & Security is always interested in new, challenging and exciting projects

Reach out to Underdog Fire & Security to receive innovative solutions for your business.

Reach out to us! We're Ready!

32 Heckel St Belleville, NJ 07109
55 Heckel St Belleville, NJ 07109
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