Here at S.E.M Security we strive to provide you with the best security and life safety systems available. We've found that by listening to our customers concerns and needs, we can design a system that really works for them and makes them feel safe and secure.

We don't specialize in just residential burglar alarms, we also provide you with life safety devices for your home such as smoke detectors and carbon monoxide detectors in addition to systems and services that make your business more secure and manageable then ever.

Our products lines include two of the leaders in the CCTV industry, BOSCH and Honeywell CCTV. Other Engineered product lines include Stanley Security Products and DSX Access control systems, Bosch Security and fire alarm products. On staff is a NICET Certified individual, supervising fire alarm installations insuring properly installed code compliant fire alarm systems according to NFPA guidelines.

Additionally we are factory trained in many of the previously mentioned product lines.

S.E.M Security is recognized locally, for combining extraordinary customer service with a commitment to meeting and exceeding the highest standards set for the our customers and the industry.

Serviced Areas

  • Bergen County NJ, Sussex County NJ, Passiac County NJ, orange County NY, Rockland County NY

Payment Options

  • American Express, Credit Terms Available, Debit Cards, Financing Available, MasterCard, Personal Checks, VISA

Contact Details

  Website
  Person Stephen Mocarsky
  City Warwick, NY
  Zip Code 10990
  Address P.O.Box 454
  Phone Number (845) 986-0336

Business Representative

Stephen Mocarsky

Founder/ President

Stephen Mocarsky is Nicet Certified for Fire Detection, has over 30 years of experience in the electronic detection field.

Customer Testimonials

I have hired several different security company’s and have been disappointed.
Finally threw a recommendation I was told about S.E.M.
they are used in my business as well as home.
I DId my due diligence and found everything I was told was true.
1 They do what they say.
2 There is no bait and switch.
3 They do not over due a system just to sell you.
4 When they give you a time they show up and never miss an appointment.
5 Extremely reliable.
6 They are neat & clean up after themselves.
7 They are first in their class.

Photo Book

From Our Website

Welcome to S.E.M. Security Systems your full service Electronic Security Company serving New York and New Jersey for all your Home and Business needs. We are experts in designing, installing and Monitoring, Burglar Alarms, Security Systems, Certified in Fire Alarms, Camera Systems, CCTV, Access Control, and more. Here at S.E.M. every customer gets individual attention, a reputation we are proud of. That's why we were chosen to protect many large companies in New York and New Jersey. Our relationship-focused approach means we will be there to ensure that your security system remains a perfect fit, as your needs and technologies may change over time.


It'd be easy for us to just say "choose us!", but instead, we'd like to share 10 reasons why we think (and our clients think) you should select S.E.M Security. You'll notice we have more than 10 reasons listed, that's because based on your feedback, we are proud to say that the list continues to grow! Other alarm companies have come and gone, but S.E.M Security Systems has served and grown with our community for over 30 years. When trying to select a company that will provide service and support for many years, you can be assured that S.E.M Security has clearly earned the long-term trust and confidence of its customers.


Each year there are over 400,000 fires in residential structures in the United States alone. Among those fires, an estimated $4.7 billion is caused in damages and over a thousand deaths have occurred. Fortunately, with devices such as smoke detectors and heat detectors you can help prevent damages occurred, and possibly even save lives. We use the highest quality and newest technology smoke detectors and heat detectors in the industry. When you combine our fire services with our unmatched alarm monitoring services, we'll notify your local fire department immediately of the fire signals, increasing your chances to limit any loss.


With over 30 years of experience; of all services S.E.M Security provides, no single service has undergone more of a technological revolution than access control systems. What was once considered the realm of science fiction is now reality with systems that incorporate features such as finger print analysis, voice analysis as well as the ultimate in access control, retina scanning. Although more traditional card access systems are still widely used and dependable, more and more security providers and security managers are seeking out even more reliable systems that offer much more such as providing real-time, stored, secure data on who, what, where and when is entering or leaving.


You are probably familiar with the basic burglar alarm system in homes that includes an alarm panel, motion sensors, glass break sensors, etc. There are also add-ons to the system you can take advantage of for added security. One such add-on is a panic alarm, which is designed to sound the moment they are activated. Do not let yourself be an easy target. Call S.E.M Security Services today and schedule a free consultation with one of our experienced security consultants. The installation, by our technicians, is aesthetic, professional and affordable.


When your monitored alarm is triggered a Central Station Alarm Monitoring Provider such as S.E.M Security Systems receives the alarm and then provides the alarm monitoring Call Verification that verifies the event and most importantly we place a 'Call to Dispatch' to the appropriate authorities once the monitored alarm event has been verified. With S.E.M Security Systems all monitored alarm events are handled by trained professional dispatchers that meet or exceed all industry requirements. Once a monitored alarm Call to Dispatch has been placed, your local authorities give the event a Priority Response as a result of the Call Verification procedures and years of trust formed between S.E.M Security and local authorities.