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Connelly Security Systems Ltd Css Ltd

CSS supplies and installs domestic and commercial intruder and fire alarm systems in Scotland.

Security and Investigations
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Headquarters
Glasgow, United KingdomSource: RevenueBaseRetrieved October 13, 2026
Employee range
51 to 200Source: RevenueBaseRetrieved October 13, 2026
Founded
1986Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
110 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Connelly Security Systems Ltd Css Ltd do?

CSS reports alarm installations ranging from basic domestic systems to schools, supermarkets and factories. CSS installs and maintains intelligent security systems, most of which are linked to its 24-hour Alarm Receiving Centre.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

What the business offers

Services & capabilities.

Intruder and fire alarm systems

CSS supplies and installs these systems for domestic and commercial settings in Scotland.

Source: LinkedIn company description · Retrieved October 13, 2026

Intelligent security system installation and maintenance

CSS installs and maintains intelligent security systems, most linked to its 24-hour Alarm Receiving Centre.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

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BADGE PREVIEWConnelly Security Systems Ltd Css Ltd listed #1 on Alarm system companies, September 18, 2026Open the published source list.
Connelly Security Systems Ltd Css Ltd

#1 Alarm system companies

Snapshot: September 18, 2026

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Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 4, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 2, 2026, September 4, 2026, September 5, 2026, September 6, 2026, September 13, 2026, September 15, 2026, September 18, 2026, September 19, 2026, September 20, 2026, September 26, 2026, September 27, 2026, September 28, 2026, September 29, 2026, September 30, 2026, October 8, 2026 and October 11, 2026. How the company lists are built.

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