Complete Security Systems
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What do you want to protect? At CSS, we design customized security solutions to help protect the things that matter most. Because what's important to you is important to us. The safety of your business is our business. So whether you're a small business or a large enterprise, we can design a security solution that works for you 24/7.

And with our professional monitoring service, you can rest assured that your business is protected from intruders, fire and more. There's no place like home. Our personalized home security solutions are designed to keep your family and valuables safe. And with our professional monitoring service, you can rest assured that we're here to respond to an emergency, even if you can't.

It's the safety you want. The security you need. From Sussex county to Cape May county (and everywhere in between), we look after your home and business like you're family. After all, we live and work here too. We've been family owned and operated for over 35 years. Proud to be New Jersey's premier electronic security company, providing home and business security systems across the greater New Jersey area.
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We're Complete Security Systems, one of the largest independently owned, full service security and fire alarm companies in New Jersey. Our story begins in 1983. Back then, founder Chris Mosley ran a one-man operation out of his toolbox. Today, we're one of the oldest and largest security providers in New Jersey and the only company to be awarded the prestigious NJESA Dealer of the Year for 3 years.
We will follow up with you within 24-48 hours with an answer or to schedule a service visit if needed. You can also find answers to common questions or see our product help for manuals and videos. Complete Security Systems, Inc. is taking every precaution in an attempt to protect our employees and client's safety, security, and health.
CSS is the chosen security specialist for some of New Jersey's largest commercial and industrial facilities. We offer total protection from fire and intrusion for office buildings, schools, warehouses, medical clinics, retail and more. Our certified security experts will design and install a customized system featuring the leading security products in video surveillance, access control, fire alarm systems and interactive security.
Protecting your family is serious business, which is why we take our business equally as serious. With a cellular connection you can control your security system remotely, as well as control other devices such as locks, lights thermostats, and cameras. While most systems provide basic home protection, the right communication capabilities greatly enhance the security performance of your system.
Reviews (9)
Tam Landi
Tam Landi
Nov 16, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
GARDEN STATE ENDOSCOPY is happy with all services provided
Horizons At Woodlake Greens
Horizons At Woodlake Greens
Feb 16, 2021
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Positive: Professionalism, Punctuality, Quality, Responsiveness
Complete Security Systems has been great to deal with. They have been quick to respond to our needs, professional and prompt. Dealing with Brian, Lauren and Craig to name a few have been a pleasure. Thank you.
Jerry Tomaselli
Jerry Tomaselli
Nov 09, 2020
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Positive: Professionalism, Responsiveness
COMPLETE SECURITY SYSTEMS IS THE BEST - GREAT TO DEAL WITH !
John Luthin
John Luthin
Sep 05, 2020
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Positive: Professionalism, Punctuality, Responsiveness
We have used CSS in our home for over 25 years and have been happy with there system and service. We are moving to a new home and hope to continue CSS provide us with their excellent service.
Wendy Weintraub
Wendy Weintraub
Aug 02, 2020
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Complete Security Systems installed an alarm in my house 2 1/2 years ago. That alarm was faulty (by no fault of CSS). CSS could’ve just let it be, I paid in full, and it was over. They did not, instead, they kept sending people in to fix it, free of charge, and eventually decided that it was best for me and them if they just replaced it. They replaced my entire system for no charge, and even credited me back the money for monitoring, giving me a year free! Their integrity is obvious in this action. I am a very grateful. Satisfied customer! I would like to give a special call out and thank you
Megan Sturrock
Megan Sturrock
Nov 09, 2019
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Had a few questions regarding the Alarm System, as renting property. - Lillian was extremely helpful. She kindly sent through the Manual for assistance.
I would highly recommend CCS for their systems, and for the very helpful and pleasant staff when you have questions.
Roberta Lyons
Roberta Lyons
Oct 06, 2019
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Terry Hemmer was scheduled to repair our system today between 8am and 9am. He was here punctually, identified the problem and repaired it quickly. He was pleasant, courteous and most importantly, knowledgeable. Thanks.
Shine Wann
Shine Wann
Oct 01, 2019
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While I can't speak for their work, one of their vans was tailgating and high beaming me on 287 (I was doing 70-80) and driving aggressively overall. This is a completely unprofessional representation for the company, especially when the van is theoretically an ad for them. Hopefully they will tell their employees they should be representing the company at all times and not just when they are installing.
Barbara Cremeans
Barbara Cremeans
Aug 23, 2019
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I had been a customer for the past 28 years. I recently sold my business and strongly recommended the new owner to continue using this company. I never had one issue concerning the way they conducted business in 28 years and that says a lot! The new owner is continuing with them as well.
Thank you for all the years of great service!!