The quest for a good security firm is serious business. While an Internet search will bring lots of results, a careful study will show that MJC is the best choice. From executive protection and security to special event security detail, we provide both armed and unarmed security services throughout the New York City area. First, we supply all aspects of watch and patrol services, including armed escorts, executive protection, security staffing at retail stores, guards at corporations and hotels, special event security, NYC permit acquisition services, and canine explosive detection teams. We can handle security concerns that range from the mundane to the extremely complicated. We’re known for meticulous attention to detail and thorough pre-planning. We leave nothing to chance and we spend hours in the office just thinking of things that could occur and what our responses will be. Nothing that happens at any business will be a surprise to us, and we’ll be ready for all situations. Unlike other so-called security firms, we’re licensed, bonded and insured, and we have the necessary papers to prove it. The combined experience of our employees adds up to hundreds of years. Our experienced staff will create security programs tailored to a specific site and its individual requirements. We work 24/7 and understand that security in the post 9/11 era is a whole new ball game. Other security companies may claim to have highly qualified personnel, but have they been background checked? Have they been subjected to regular drug tests? Do they have to undergo rigorous physical exams? Has their experience been verified? Our clients can be assured that our staff meets all of the above criteria. Everyone at MJC is dedicated to quality service, professionalism, the use of state-of-the-art technology, and, most of all, total client satisfaction. If you need executive protection and security, armed or unarmed, we are your “go to” choice. New York While other so-called top security companies can only promise, MJC Security can deliver. Don’t trust security needs to an unknown. Call MJC at 1-516-868-3869 today for a free security consultation.

About Us

” We provide armed and unarmed uniformed officers, patrol services, video surveillance, event security and executive protection. “


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Our security team consists of former military officers, local police officers as well as other law enforcement personnel with years of experience and dedication. They are committed to improving and sustaining professional growth of every employee through industry related trainings that continue to support our mission.

Team Members


Martin J. Campbell founded MJC III Security, LLC with a combination of law enforcement, military, and security experience. With military training in civilian and site protection, counterterrorism, and communications, Martin secured sensitive materials and millions of dollars’ worth of equipment. During his military career, Martin was deployed to Bosnia, where he served as a designated instructor for counterterrorism. In civilian life, Martin pursued his passion for keeping people safe—working for the Waldorf Astoria New York and Mount Sinai Hospital. He has also worked major red carpet and high-security events for prominent private security firms.

In 2004, Martin joined the New York City Police Department (NYPD), where he continues to serve. His police training includes automobile crime, terrorist awareness, criminal law, intelligence gathering, Hazmat, and active shooters protocols. In 2013, Martin was promoted to the rank of sergeant at the NYPD. He has received several professional accolades in recognition of his superior performance.

Martin earned his Bachelor of Arts degree in Criminal Justice from John Jay College’s School of Criminal Justice. As a certified General Topics Instructor, Martin has the ability and authority to operate a security school and instruct new security officers.


With almost twenty years of public service, Magdalonie Campbell has extensive experience in office and public administration. Entering government work through the office of a New York State Senator, she eventually became an administrative assistant in the New York City Department of Juvenile Justice.

In 2006, Ms. Campbell began her career at the New York City Administration for Children’s Services (ACS), where she served as a Child Protective Specialist for a decade. Additionally, Ms. Campbell has also worked as the Assistant to the Deputy Director of Operations for ACS, focusing on departmental oversight and interagency partnerships.

Ms. Campbell joined the office of the State Senator for the 9th district in 2016, where she was District Director. In this capacity, Ms. Campbell managed the office of the senator, working strategically across departments to oversee the concerns of over 3,000 constituent cases. She currently handles a similar position for the U.S. Senator as the Regional Director.

Ms. Campbell received her Bachelor of Arts in Forensic Psychology from John Jay College of Criminal Justice. She went on to achieve a Master of Science in Social Enterprise Administration (SEA) from Columbia University’s School of Social Work in 2012.

Mobile App

“This Application will provide the peace of mind that your employees are seeking”

By allowing each staff member to notify local authorities and specific law enforcement units with one click, the MJC III Application is a quicker and safer alternative!



  • Notifies 911 operators, local authorities such as city, county, and state police stations and specific specialized units such as the Counterterrorism Bureau, Bank Robbery Task Force, and Joint Terrorism Task Force accurately via email within seconds.
  • Provides local law enforcement entities with the exact GPS location of the emergency.

How to Use:

  • Prospective clients will provide MJC III with their employees’ personal information, and the information will be uploaded into the MJC III Security Emergency Application database.
  • The MJC III Security Emergency Application will monitor each of the client’s business location throughout the duration of the contract.
  • The client have to download the application to their smart devices and select the specific emergency, such as: active shooting, robbery, bomb threats, etc. when needed.
  • After clicking on the specific icon, an email confirmation will be sent immediately to your email, letting you know help is on the way.

Current Events

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