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Our Services
- Armed and Unarmed Security Officers in Houston, Tx
- Off-Duty/Retired Police Officers in Houston, Tx
- Patrol Services
- CCTV & Control Services
- Video Surveillance System Installation/Screening/Maintenance
- Security Consulting & Risk Assessment in Houston, Tx
- Special Event Security
- Bodyguard and Executive Protection Services
- Concierge and Doorman Services
Industries We Serve
- Residential Buildings
- Commercial Buildings
- Office Buildings
- Gated Communities
- Constructions Sites
- Health Care Facilities
- Consulates
- Shopping Centers and Retail Stores
- Hotels
- Worship Facilities
- Educational Institution
- Financial Institutions
- Warehouses & Manufacturing Facilities
At Main Security and Investigations, our simple philosophy is to deliver professional, integrated security solutions and private investigative services for a wide range of clients with the most competitive prices in the industry. Based on decades of military and law enforcement experience, we strongly believe that leadership at the top of our organization, educated and well trained staff, ongoing field training, and innovative technology, all coupled with excellent customer service, can meet and exceed your unique security goals.
Main Security and Investigations is licensed by Texas Private Security Bureau (License # C19295), to provide a wide range of Security Services designed to meet your unique requirements as in Armed and Unarmed Security Guards/Off-Duty/Retired Police Officers, Patrol Services, Video Surveillance Equipment installation/screening/maintenance, Monitoring Services, Consulting and Risk Assessments, Investigation Services and more. Read details

Security Services
We deliver complete security services, under the training and management of our formal military and law enforcement professionals, from the traditional Armed and Unarmed Security Guards, Patrol Services to Off-Duty/Retired Police Officers for executive protection, special events, asset protection, traffic and crowd control.
As part of integrated security solution, we synchronize technology with well-trained security officers to best serve your security needs. We install and maintain security cameras and their related system and either use Closed Circuit Televisions (CCTV) where an MSI trained professional will monitor your feed 24/7, or conduct video surveillance that activates, register and alerts on movement designed to deter criminal activity and loss and provide an additional level of protection at a lower cost.
Our management team is highly qualified to conduct risk assessments, evaluate the current security program of your facility, identify weaknesses within the system, anticipate potential risks, and customize solutions to optimize your particular goals, suggesting security operations that are not just efficient but also cost-efficient. Read details

Investigation Services
MSI’s investigation division has in place a team with broad-based expertise, comprised of former FBI agents, military and law enforcement officers to conduct all type of investigations for businesses, law firms, insurers and private individuals. We have the experience and knowledge to handle any challenge from murders, worker’s compensation cases, to liability claims and insurance fraud cases.
Any investigation assignment is a process. We understand that by explaining to you how we operate, you can feel confident engaging and entrusting one of our investigators with your important matters, as well as making a conscious decision about the cost of the service the investigator has to offer. A successful investigation depends on a clear communication between you and the investigator where your objectives are clearly laid out and where you are informed at all times about the investigation progress.
Main Security and Investigations and Surveillance Specialty Group have teamed together in our endeavor to supply clients with professional investigative/physical surveillance services and a IV levels surveillance training program, coordinated by master instructor Joe Glad, designed to prepare students to operate with confidence and perform in a productive and discreet manner. Read details