J

Johnson Controls

Provides smart building technology and services

Security Systems Design Engineer

Full-Time
No salary listed
Mid, Senior
Bachelor's
Sunbury-on-Thames, UK
HybridHybrid working is available from offices in Sunbury, Letchworth or Birmingham.
Electrical Engineering
UK Top Secret Clearance Required

About the job

Requirements
  • Experience in the electronic security industry, ideally in a design, commissioning, or service engineering role.
  • Strong technical knowledge of enterprise security systems, including closed-circuit television, access control, intruder detection, and perimeter detection.
  • Ability to interpret architectural, electrical, and network drawings.
  • Experience producing or supporting technical system designs and documentation.
  • Understanding of integrated security solutions and associated technologies.
  • Proficiency with Microsoft Office applications and Visio.
  • Strong communication and stakeholder management skills.
  • Full United Kingdom driving licence.
  • Ability to obtain United Kingdom Security Clearance (SC).
Responsibilities
  • Design integrated electronic security systems, including closed-circuit television, access control, intruder detection, and perimeter intrusion detection systems, for projects ranging from small installations to multi-million-pound enterprise solutions.
  • Produce detailed technical designs, system architectures, schematics, specifications, and supporting documentation.
  • Conduct site surveys and assess customer requirements to develop compliant and cost-effective security solutions.
  • Collaborate with sales and project teams to support bid activities, solution development, and project delivery.
  • Provide technical guidance and troubleshooting support throughout the design and implementation phases.
  • Liaise with customers, consultants, suppliers, and subcontractors to ensure successful project outcomes.
  • Prepare and maintain documentation using Microsoft Office and Visio.
  • Review architectural, electrical, and network drawings to support system design activities.
  • Ensure all designs comply with customer specifications, industry standards, and security requirements.
Desired Qualifications
  • Qualification in Electronics Engineering, Security Engineering, or a related discipline.
  • Experience designing high-security or critical infrastructure environments.
  • Knowledge of security system integration platforms and IP-based technologies.
  • Previous experience working on large-scale enterprise security projects.
  • Existing Security Clearance.

About the company

Johnson Controls transforms environments where people live, work, learn, and play by providing smart, healthy, and sustainable buildings. It offers comprehensive digital solutions through its OpenBlue platform, serving healthcare, education, data centers, airports, stadiums, manufacturing, and government sectors with a portfolio of building technology, software, and services focused on efficiency, safety, and sustainability. The company operates in more than 150 countries with about 100,000 experts and aims to reimagine building performance to benefit people, places, and the planet.

Company Size

10,001+

Company Stage

IPO

Headquarters

Cork, Ireland

Founded

1885

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Simplify's Take

What believers are saying

  • Q3 2026 sales hit $6.6 billion; organic growth reached 10%, lifting margins.
  • Record backlog reached $21 billion in July 2026, fueled by data-center orders.
  • JCI closed Alloy and Nantum in 2026, expanding OpenBlue and cooling capabilities.

What critics are saying

  • A 2026 HVAC price-fixing lawsuit names JCI alongside Bosch, Carrier, Trane, and others.
  • The 2024 restructuring plan still targets $400 million costs through fiscal 2027.
  • PFAS, asbestos, and environmental liabilities persist after the June 2026 Wisconsin settlement.

What makes Johnson Controls unique

  • OpenBlue now embeds Nantum AI’s occupancy-based HVAC optimization across air and water systems.
  • Alloy Enterprises gives JCI proprietary liquid-cooling components for AI data centers.
  • Johnson Controls sells mission-critical service and controls across 150 countries, creating sticky installed-base revenue.

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Benefits

  • Company Vehicle
  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • Health Savings Account/Flexible Spending Account
  • Life Insurance
  • Disability Insurance
  • 401(k) Company Match
  • Employee Referral Bonus
  • Wellness Program
  • Employee Assistance Program
  • Paid Vacation

Growth & Insights and Company News

Headcount

6 month growth

-4%

1 year growth

-4%

2 year growth

-4%
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Johnson Controls has signed an agreement to acquire Alloy Enterprises, a Boston-based thermal management technology company, to strengthen its position in the data centre cooling market. Financial terms were not disclosed. Founded in 2020, Alloy Enterprises specialises in advanced direct liquid cooling components that can improve thermal management efficiency by up to 35% and reduce pressure drop by up to 75%, resulting in lower overall cooling system energy use. The company's proprietary Stack Forging manufacturing process creates single-piece components with embedded microgeometries for maximum heat transfer. The acquisition complements Johnson Controls' existing thermal management portfolio and aligns with its strategy to deliver differentiated cooling solutions for AI-driven data centres. The transaction is expected to close in fiscal Q3, subject to regulatory approvals.