J

Johnson Controls

Provides smart building technology and services

Senior BMS Commissioning Engineer

Full-Time
No salary listed
Senior
London, UK+1 moreMore locations: Reading, UK
In Person
Architecture & Civil EngineeringBuilding Services Engineering

About the job

Requirements
  • NVQ Level 3, HNC/HND, apprenticeship, or equivalent qualification in Electrical, Electronic, Controls Engineering, or a related discipline.
  • At least 5 years of building management system commissioning experience delivering complex projects.
  • Strong knowledge of heating, ventilation, and air-conditioning systems and controls, including air handling units, fan coil units, chillers, boilers, plant rooms, terminal units, and associated control strategies.
  • Advanced experience developing, modifying, and commissioning building management system software and control systems.
  • Strong understanding of building management system architectures and communication protocols, including BACnet and Modbus.
  • Experience leading commissioning activities on large-scale construction or refurbishment projects.
  • Ability to diagnose and resolve complex system integration and performance issues.
  • ECS or CSCS certification and a strong understanding of construction-site health and safety requirements.
  • Experience with motor control systems, variable speed drives, energy management, and optimization strategies.
  • Strong communication and stakeholder management skills, with the ability to build effective customer relationships.
  • A full United Kingdom driving licence.
Responsibilities
  • Lead commissioning activities from design review through project handover.
  • Review specifications, drawings, and control philosophies, identify potential issues, and recommend solutions.
  • Provide technical leadership and mentoring to commissioning engineers and junior team members.
  • Support solution design, scope development, technical proposals, and project costing.
  • Develop, modify, and commission building management system software in line with project requirements and company standards.
  • Coordinate commissioning activities with project managers, contractors, consultants, and end users.
  • Ensure compliance with health and safety requirements, company policies, and relevant regulations.
  • Lead factory acceptance testing, site acceptance testing, integrated systems testing, and client witness testing.
  • Validate system performance, troubleshoot technical issues, and drive resolution.
  • Produce and review commissioning documentation, test records, technical reports, and handover packs.
  • Configure and commission controllers, field devices, graphics, and energy management solutions.
  • Identify project risks and opportunities and support successful delivery throughout the project lifecycle.
  • Act as a technical representative during customer meetings, project execution, and handover.
Desired Qualifications
  • Experience mentoring or providing technical guidance to other engineers.

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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Apr 27th, 2026
Johnson Controls acquires Nantum AI to boost AI-driven energy optimisation in OpenBlue platform

Johnson Controls has acquired Nantum AI, a New York-based developer of AI algorithms for building energy efficiency, to enhance its OpenBlue digital ecosystem. The deal adds advanced AI-driven control capabilities for optimising HVAC systems and reducing energy consumption. Nantum AI's technology enables real-time optimisation of building airflow based on occupancy, extending OpenBlue's capabilities beyond central HVAC systems to include granular, system-wide control. The company has demonstrated energy savings exceeding 10% for customers by leveraging data from occupancy patterns, weather conditions and utility trends. The acquisition expands OpenBlue's optimisation capabilities from water-side systems to include autonomous AI-driven control across both air- and water-side applications. The combined offering is being piloted across complex environments including healthcare campuses and manufacturing facilities.

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Ring Capital joins Enerin's Series A to decarbonise high-temperature industrial heat

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Insteel reports fastest revenue growth among building products stocks despite missing Q4 estimates

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PR Newswire
Feb 18th, 2026
Johnson Controls to acquire Alloy Enterprises, boosting data center cooling efficiency by up to 35%

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.