About Us

Established in 1991 as PM Securities and later renamed GSM Security Ltd. in 2000, we specialise in the design, supply, installation and maintenance of both electronic and physical security systems for buildings both in the private and commercial sectors.

A London based security company, GSM Security employs a team of friendly, skilled and highly experienced security specialists who are always available to advise or assist with your property protection requirements. All our staff are police screened in order to meet police requirements thus providing customers with complete peace of mind. Our aim as a security company is to provide the very best possible security services and security systems for our customers.

Security from GSM

GSM Security currently maintains between 400 and 500 sites within the Greater London area, predominantly in the West End and the City. These sites include installations such as Windcrest emergency lift phones, CCTV Systems, Access Controls, Audio/Video Entry Systems and Burglar Alarm systems as well as ongoing security services such as Keyholding & Alarm Response, Monitoring of security systems in addition to routine and emergency maintenance.

Quality Security Services from a Company You Can Trust

We adhere to strict industry guidelines ensuring the highest possible service to our clients. We are SSAIB Certified and fully accredited as a SAFEContractor. In addition, we have recently qualified as part of the PICS scheme thus guaranteeing a high level of health and safety.

Midway through 2013, GSM Security was brought under the prestigious Banham Group umbrella and continues to grow by providing high quality security services and security systems to both existing and new clients.

Areas Covered

We mainly operate within the M25 however we serve many properties outside as well. Please do not hesitate to get in touch for further information.

Existing Clients


  • SSAIB logo
  • PICS logo
  • SAFEcontractor logo
  • CAMESAFE logo