HE Simm & Son

What HE Simm & Son does

HESIS (legal entity HESIS Limited, trading name of HE Simm & Son, founded 1948) is a privately-held UK fire and security services provider headquartered at Liverpool Innovation Park with a secondary office in Crawley. The company designs, installs, and maintains integrated fire detection, security, access control, CCTV, intruder alarm, nurse call, disabled refuge and emergency lighting systems for enterprise clients across government (HMP/GFSL prison estate, 20 prisons), financial services (Nationwide Building Society, ~700 branches and 15 administrative buildings), critical infrastructure (Liverpool John Lennon Airport) and healthcare (Betsi Cadwaladr University Health Trust). Core technology is built on Honeywell Gent Vigilon networked fire alarm panels integrated via the Cortech platform, exposed to customers through the HESIS Customer Experience Centre (HCEP) web portal which provides live data feeds, KPI/SLA reporting and event monitoring from technology desks operating 24/7/365.

The revenue model blends recurring revenue and project work. Approximately 350 planned preventive maintenance (PPM) calls per month are delivered against the Nationwide contract alone (worth roughly £900k total, ~£400k for PPM), supplemented by reactive breakdown response, ad-hoc installations, and emergency/rapid-deployment project work such as the COVID-19 Rainbow Hospitals (642 beds at Deeside and Bangor, delivered in 3 and 2 weeks respectively via an Integrated Health Projects joint venture with Sir Robert McAlpine and Vinci Construction UK). Go-to-market is direct enterprise field sales through competitive tender; contracts typically start with a trial or short initial period before extending to multi-year full awards (e.g., Nationwide three-year renewal, GFSL expansion from 12 to 20 prisons). The firm is BAFE-accredited, an FIA member, and a designated Honeywell GENT 24 Technology Centre, with 251–500 employees operating across England, Scotland and Wales.

Name

HE Simm & Son

Legal name

HESIS Limited

Website

https://hesis.co.uk

Company type

Private

Founded year

1948

Operating status

Operating

Headcount range

251–500 employees

Short description

HESIS (HE Simm & Son) is a UK-based, BAFE-accredited fire and security services provider founded in 1948, designing, installing and maintaining integrated Honeywell Gent Vigilon-based systems for prisons, financial institutions, airports, healthcare trusts and commercial clients from offices in Liverpool and Crawley.

Ownership category

akta.pro rank

Product category

Fire and Security Services

NAICS

Security Systems Services (56162), Security Systems Services (except Locksmiths) (561621)

SIC

Services-Facilities Support Management Services (8744)

akta.pro primary industry

Fire Alarm Systems (Design/Install/Service/Monitoring) (BPABAHAA)

akta.pro secondary industries

Fire Alarm & Life Safety Systems Integration (BPAKAGAF), Fire Alarm Systems (Inspection/Testing/Monitoring/Service) (IMAIAJAC), Commercial & Industrial Alarm Monitoring (BPAKAFAB), Testing, Inspection, Maintenance & Compliance Services (NFPA/Local Code) (HSAHAFAG)

Keywords

• Fire detection systems
• Security systems installation
• CCTV surveillance
• Access control solutions
• Fire safety compliance

Headquarters

HQ city

Liverpool

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Planned Preventive Maintenance (PPM) Contracts: Recurring maintenance contracts delivering approximately 350 PPM calls per month across client properties, with twice-yearly servicing on each building. Includes reactive breakdown response within five days.
2. Fire and Security Maintenance Services: Ongoing maintenance services for fire and security systems across government facilities (prisons), commercial buildings, and critical infrastructure. Contracts typically begin with trial periods and extend to multi-year full awards.
3. Project Installation Services: One-time installation projects for fire and security systems in new construction or facility upgrades, including mechanical, electrical, and public health installation work.
4. Reactive Breakdown Services: Emergency call-out and repair services for fire and security system breakdowns, delivered through 24/7 service desk operations.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

HE Simm & Son (trading as HESIS) designs, supplies, installs, and maintains integrated fire alarm and detection systems alongside security systems (CCTV, intruder alarms, access control, public address, nurse call, disabled refuge, emergency lighting) for UK organisations including prisons, banks, airports, hospitals, schools, hotels, and retail outlets. Services are delivered through a 24/7 in-house engineering team and a customer experience portal that provides live premises data and performance reporting.

Product overview

HESIS (HE Simm & Son) operates as a unified fire and security solutions provider offering integrated systems across two core product lines: Fire Alarm and Detection Systems (including Honeywell Gent-based platforms, fixed fire extinguishing, and BAFE-accredited installation and maintenance) and Security Systems (covering CCTV, intruder alarms, access control, nurse call, disabled refuge, emergency lighting, and custodial sector solutions). These core offerings are supported by the Aftercare and Service Desk module providing 24/7 reactive and preventive maintenance, and the HESIS Customer Experience Centre (HCEP) Portal providing live monitoring data and KPI reporting. The portfolio serves a diverse range of sectors including airports, hotels, retail, banking, healthcare, prisons, and education.

Differentiator

Problem solved

Functional benefit

Brands

• HCEP (HESIS Customer Experience Centre): Customer portal providing live data from premises and platform for monitoring events

Products and services

• Fire Alarm and Detection Systems Supply, installation, and maintenance of fire alarm and detection systems protecting people and assets across offices, schools, shops, hotels, airports, and homes. Includes bespoke system design, BAFE-accredited installation and maintenance, fixed fire extinguishing systems (riser, hydrants, suppression), and full UK fire safety regulation compliance certification.
• Security Systems Supply, installation, and maintenance of comprehensive security systems including CCTV, intruder alarms, access control, public address systems, nurse call and staff attack systems, disabled refuge systems, and emergency lighting for commercial, custodial, and healthcare sectors.
• Aftercare and Service Desk 24/7 service desk and aftercare service providing preventive planned maintenance, emergency call-out facilities, performance monitoring against KPIs and SLAs, and monthly reporting for fire and security customers.

Quantifiable outcome

• Zero disruption to passenger operations during Liverpool John Lennon Airport fire alarm upgrade completed in live environment
• +4 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core.

• Honeywell GENTcoreTechnology or IntegrationHESIS operates as a GENT 24 Technology Centre and installs Honeywell Gent Vigilon fire alarm systems. The partnership provides access to VAD design tools, specialized training, and technical support for deploying industry-leading fire detection technology across client sites.
• CortechcoreTechnology or IntegrationHESIS integrates Cortech platform into fire and security system installations, enabling centralized management and monitoring of multiple building systems from a single interface.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Mitie: UK-listed integrated facilities management and security services group with a large fire & security division serving enterprise and government clients across multiple verticals — comparable to HESIS on customer profile and service mix but operating at much greater scale and breadth.
• Securitas UK: Global security services provider with significant UK electronic security and fire systems operations — comparable on alarm monitoring and integrated security but competing from a much larger resource base.
• Stanley Security (UK): International electronic security and fire systems integrator with UK operations — comparable to HESIS on integrated security and monitoring solutions, with broader geographic reach.

Direct peers

• Kings Secure Technologies: UK specialist in integrated fire and security systems, including custodial-sector work — directly comparable to HESIS, particularly in the HMP estate and high-security environment segment.
• ADT UK: Major UK provider of intruder alarms, CCTV, access control and fire detection with a strong recurring monitoring and maintenance revenue model — overlapping HESIS's security and aftercare services across commercial and residential segments.
• Chubb Fire & Security: One of the UK's largest dedicated fire and security systems integrators offering design, install, monitoring and maintenance of detection, suppression and security systems — directly comparable to HESIS's core offering across commercial and regulated end markets.
• Reliance High-Tech: UK independent fire, security and integrated systems integrator serving enterprise and public-sector clients — closely comparable to HESIS on integrated solutions, recurring maintenance contracts and multi-sector client base.
• Total Integrated Solutions (TIS): UK independent provider of fire, security, CCTV and integrated building systems — comparable mid-sized peer with similar service mix and enterprise/government client orientation.
• Galaxon Group: UK fire, security and electrical services integrator serving commercial and public-sector clients — comparable in scope, accreditations and recurring-maintenance business model.
• Pointer (Pointer Ltd): UK fire and security systems integrator with a comparable mix of design, install and maintenance services; serves enterprise clients in regulated environments similar to those targeted by HESIS.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/HESIS_ltd
• LinkedInlinkedin.com/company/hesis

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about HE Simm & Son