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G4S Tech Stack

Global security and facility services operator with 800k workforce

Security and Investigations London 10,001+ employees Privately Held

G4S operates a large-scale security and facilities business across 25+ countries, with a workforce of approximately 800,000. The hiring mix is heavily weighted toward security and operations roles (978 and 209 respectively), with engineering (45 roles) supporting a modernization effort that includes new IP development, mapping tools (Leaflet adoption), and infrastructure management (Terraform, Ansible, SAP). The stack spans legacy systems (IBM Maximo, Oracle, Sybase) and modern cloud (GCP, MongoDB), reflecting integration challenges typical of large service operators managing distributed field operations and compliance complexity.

Tech Stack 92 technologies

Core StackC# SolidWorks Bitbucket JavaScript TypeScript Python SQL Server MySQL Ansible Terraform SAP Oracle MongoDB Linux Google Workspace Microsoft Office BMS SQL Altium IBM Maximo Visual Studio Code Windows CAD Bash GCP Apache Ignite Sybase Solaris Genetec Everbridge+60 more

AdoptingLeaflet

What G4S Is Building

◆Challenges

Ensuring compliance with client protocols
Maintaining compliance with local regulations
Process inefficiencies
Ensuring safety compliance
Meeting sales targets
Tight deadlines
Business disruption
Staffing shortages
Significant growth in security services
Minimising operational downtime

▲Active Projects

Installation projects for large customers
Safety plans design and implementation
Planned maintenance program
Large-scale outage maintenance
Risk inventories
New ip development
Contract cleaning service development
Ahoc project
Renovation projects
Client data correction campaign

Hiring Activity

Accelerating1,400 roles · 700 in 30d

Department

Security

978

Ops

209

Support

62

Engineering

45

Healthcare

31

Sales

30

HR

28

Finance

12

Seniority

Junior

881

Mid

382

Manager

65

Senior

63

Lead

23

Intern

10

Director

3

Staff

3

Notable leadership hires: Security Team Lead, Safety Project Lead, Mobile Surveillance Lead, Chief Security Guard

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About G4S

G4S is a privately held security and facility services company headquartered in London with approximately 800,000 employees globally. The company delivers manned guarding, electronic monitoring, access control, secure cash solutions, and integrated technology services to mid-market and enterprise clients. Core operations span security services, facility management, youth custody and treatment programs, and secure solutions. The business model centers on field-deployed personnel coordinated through centralized systems for scheduling, compliance tracking, and risk management. Active projects include large-scale installations, safety plan design, maintenance programs, and client data remediation — typical of organizations managing high-touch, distributed service delivery across regulated industries.

HeadquartersLondon

Company Size10,001+ employees

Hiring MarketsGreece, India, Belgium, Netherlands, Brazil, Bangladesh, United Kingdom, Colombia

Frequently Asked Questions

What tech stack does G4S use?

G4S runs a hybrid infrastructure: legacy enterprise systems (IBM Maximo, SAP, Oracle, Sybase), databases (SQL Server, MySQL, MongoDB), cloud (GCP), development tools (C#, Python, TypeScript, Visual Studio Code), and security-specific software (Genetec access control, Everbridge emergency management). Recently adopting Leaflet for mapping.

How many employees does G4S have?

G4S operates with approximately 800,000 employees globally, supporting security and facility services across multiple continents. Current hiring is accelerating with 1,438 open roles.