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Powertrain and People HVAC
Integrated thermal management and HVAC
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Complete Thermal
Management Systems
All-in-one battery, power electronics, and cabin HVAC systems
Chassis-mounted complete thermal management
Double-deck bus complete thermal management
Rooftop-mounted complete thermal management
Driver and Passenger HVAC
HVAC solutions for climate comfort
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Cabin HVAC
Reliable cabin heating and air conditioning
Demisters for windscreen defogging
Rooftop air-conditioning systems
Heating
Fast-response cabin and floor heaters
Cabin heating modules
Floor heating modules
Heat Pump
Ultra-efficient reversible heat pumps
Driver cabin heat pump systems
Hot liquid heat pump systems
Powertrain Thermal Management
Thermal control of batteries, engines, motors and electronics
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Battery Thermal Management Systems
Advanced battery heating and cooling to life and performance
Mobile battery thermal management systems
Stationary battery thermal management systems
Rail battery thermal management systems
Coolers
Liquid-cooled radiator modules for BEV, ICE & FCEV
Power electronics and traction motor cooling systems
Hydrogen fuel cell cooling systems
Internal combustion engine cooling systems
Thermal System Components
Robust core components for thermal systems
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Auxiliary Heaters
Electric water heaters for clean, instant coolant heating
PTC and resistive electric water heaters.
HMI Controller
User-friendly HMI control panels for drivers
Climate control HMI panels
Electric Water Pump
Stable coolant flow for precise heating and cooling
Canned motor electric water pumps
Magnetic drive electric water pumps
Sensor
Precision sensors for intelligent thermal system monitoring
Temperature sensors for thermal monitoring
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About Us
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Generations of Thermal Management Expertise
Efficient cabin & saloon comfort & visibility for drivers, operators and passengers.
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Our Mission, Vision & Values
Capabilities
Leadership Team
Careers
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Services
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Supporting your business is our business
Efficient cabin & saloon comfort & visibility for drivers, operators and passengers.
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Services & Maintenance
Ensure your vehicle’s HVAC and cooling systems continue to provide optimum performance.
Aftermarket Parts & Products
Reliability is essential for vehicle OEMs and operators to minimise downtime.
Technical Support
We know how important it is for you to be able to quickly get an answer to a technical query.
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Sectors We Serve
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Thermal management experts in your sector
Efficient cabin & saloon comfort & visibility for drivers, operators and passengers.
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Bus & Coach
Comfort and performance across all routes
Commercial Vehicle
Thermal performance for every mile
Defence
Mission-critical thermal management
Off Highway
Helping OEMs break new ground
Rail
Helping to keep rolling stock rolling
Special Vehicle
Built for every unique application
Stationary Power
Keeping power systems performing
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Career Opportunities

About Us
Careers

Grow with us

If you are looking for an ambitious organisation that values its people and provides you with an opportunity to grow and succeed in the expanding world of zero-emission vehicles, then we want to hear from you.

We pride ourselves on not only developing innovative solutions to help deliver a greener future but also developing our dedicated and diverse team of people. From competitive salaries to exciting career progression, we work hard to ensure the well-being and satisfaction of our talented and empowered workforce.

We are always looking for talented and motivated individuals to join us on our journey. If you are interested in joining us, register your CV and contact details with our HR department by emailing employment@graysonts.com today.

See our vacancies:

Electrical Design Engineer

You will contribute to all aspects of electrical system design within the engineering team, supporting concept development, prototype builds, and release of electrical designs into production.
Full-time
View Job

Electrical Design Engineer

Full-time
You will contribute to all aspects of electrical system design within the engineering team, supporting concept development, prototype builds, and release of electrical designs into production.
hile the role covers the full breadth of electrical design activities, you will focus on the design, integration, and documentation of electrical systems used within our vehicle thermal management solutions. As a key contributor to electrical system delivery, you will support best practices in power distribution, protection strategies, grounding, wiring and harness design, and system integration. You will support other engineers by reviewing electrical aspects of their designs, contributing to technical decision‑making, and ensuring designs meet performance, safety, and reliability requirements. You will work closely with mechanical engineers, software and controls engineers, manufacturing, procurement, and suppliers to ensure electrical system designs are practical, robust, serviceable, and aligned with production capability. During prototype builds, you will work hands‑on with technicians to support installation, commissioning, fault‑finding, and issue resolution. Following testing and validation activities, you will ensure designs are updated, documented, and ready for smooth transition into serial production. This is an office‑ and workshop‑based role requiring a professional electrical engineer with strong system‑level understanding and a practical approach to engineering delivery.

Job Overview

FOR MORE DETAILS AND TO APPLY THROUGH LINKEDIN: https://www.linkedin.com/jobs/view/4480989360/

Responsibilities

  • Produce electrical schematics, wiring diagrams, harness layouts, and electrical bills of materials (BOMs) to support release into production
  • Design and define vehicle‑ and system‑level electrical architectures, including power distribution, fusing and protection, grounding strategies, and cable / harness routing
  • Specify electrical components such as cables, connectors, contactors, relays, sensors, and actuators
  • Ensure electrical designs are suitable for environmental conditions, vibration, thermal exposure, service access, and manufacturability
  • Work closely with mechanical design engineers to ensure electrical routing, mounting, and protection are incorporated early in the design process
  • Support prototype builds, commissioning, troubleshooting, and fault diagnosis activities
  • Assist in the preparation and execution of Design Verification Plans (DVPs) for electrical systems
  • Prepare and maintain electrical design documentation, including schematics, harness drawings, installation information, and technical notes
  • Collaborate with multidisciplinary engineering teams to ensure successful integration of electrical systems within overall product designs
  • Liaise with suppliers and contractors to specify and source electrical components and resolve technical issues
  • Participate in design reviews and contribute to continuous improvement activities

Experience

  • Proficiency in electrical CAD tools (e.g. SolidWorks Electrical, EPLAN, or equivalent)
  • Minimum of 2–3 years’ experience in an electrical engineering or electrical design role
  • Experience within manufacturing, automotive, rail, off‑highway, or similar vehicle / equipment sectors desirable
  • Strong understanding of: Electrical power distribution and protection, Wiring and harness design, Electrical installation best practice
  • Experience supporting prototype builds and production release
  • Familiarity with CAN / LIN networks from an electrical wiring and integration perspective
  • High attention to detail in design and documentation
  • Experience using ERP / MRP systems for BOM creation and management

Our offer to you

    Apply Now

    To apply, please email your CV, along with the name of the position you are applying for, to employment@graysonts.com.

    Controls Engineer

    The Software & Controls Engineer is responsible for the specification, development, verification, validation, and support of embedded software and control systems used in thermal management products for commercial vehicles, off-highway equipment, and zero-emission vehicle applications.
    Full-time
    View Job

    Controls Engineer

    Full-time
    The Software & Controls Engineer is responsible for the specification, development, verification, validation, and support of embedded software and control systems used in thermal management products for commercial vehicles, off-highway equipment, and zero-emission vehicle applications.
    The role includes the development of control strategies for HVAC, Battery Thermal Management Systems (BTMS), cooling systems, heat pumps, and auxiliary vehicle systems, ensuring compliance with customer, regulatory, and internal requirements. The engineer will work closely with systems engineering, electrical engineering, product engineering, test & validation teams, and customers throughout the product lifecycle. TO APPLY THROUGH LINKEDIN AND TO SEE MORE INFORMATION: https://www.linkedin.com/jobs/view/4482059241/

    Job Overview

    Requirements & System Definition Capture and analyse customer and system requirements. Develop software requirements specifications. Support system architecture development. Generate requirements traceability matrices. Support FMEA and functional safety activities where applicable. Define control strategies and operating modes. Design and develop embedded control software. Develop Stateflow/Simulink models and auto-coded solutions where appropriate. Configure and develop software for electronic control units (ECUs). Develop diagnostics and fault management strategies. Implement CAN communications and vehicle interfaces. Apply coding standards and software quality processes. Develop software verification plans. Produce Software Design Verification Plans (DVPs). Support Hardware-in-the-Loop (HIL) and Software-in-the-Loop (SIL) testing. Support climatic chamber testing and vehicle validation activities. Investigate software-related failures and field issues. Analyse test results and produce validation reports. Support production launch activities. Troubleshoot vehicle and customer issues. Support root cause investigations. Implement corrective and preventive actions. Support aftermarket and service engineering where software updates are required. Support software development process improvement. Contribute to engineering standards and best practices. Support cybersecurity and software quality initiatives. Mentor junior engineers where required.

    Responsibilities

    • Capture and analyse customer and system requirements.
    • Develop software requirements specifications.
    • Support system architecture development.
    • Generate requirements traceability matrices.
    • Design and develop embedded control software.
    • Develop Stateflow/Simulink models and auto-coded solutions where appropriate.
    • Develop software verification plans.
    • Produce Software Design Verification Plans (DVPs).
    • Support production launch activities.

    Experience

    • Degree in Control Engineering, Electrical Engineering, Electronics Engineering, Software Engineering or related discipline or similar.
    • Experience developing embedded software for automotive or commercial vehicle applications.
    • Experience with CAN-based vehicle systems.
    • Control algorithms development (PID, Hysteresis, MPC).
    • Thermal system control strategies.
    • MATLAB / Simulink.
    • Stateflow.
    • Embedded C++.

    Our offer to you

      Apply Now

      To apply, please email your CV, along with the name of the position you are applying for, to employment@graysonts.com.

      Sector Sales Manager – Stationary Power and Data Centres

      If you are searching for an ambitious and growing company that can offer you a role in the exciting and growing world stationary power markets and applications this role at Grayson Thermal Systems is an opportunity for you.
      Location: Wharfdale House, 257 Wharfdale Rd, Birmingham B11 2DP
      Full-time
      View Job

      Sector Sales Manager - Stationary Power and Data Centres

      Full-time
      Location: Wharfdale House, 257 Wharfdale Rd, Birmingham B11 2DP
      If you are searching for an ambitious and growing company that can offer you a role in the exciting and growing world stationary power markets and applications this role at Grayson Thermal Systems is an opportunity for you.
      Reporting to the Head of EU Sales and Marketing, the Sector Sales Manager will own and grow Grayson Thermal Systems’ business within the stationary power and data centre back-up power markets. The role requires proven hands-on sector experience, an established network of relevant contacts and the credibility to engage at generator set and battery energy storage OEMs, system integrators, data centre developers and operators. You will develop and execute the sector sales strategy, build and convert a strong opportunity pipeline, and secure profitable long-term business for Grayson in this growing market sector. This is a technical, specification-led sales role involving long sales cycles, requiring close collaboration with Engineering, Programme Management, Quality and Supply Chain. Sector experience is critical to the candidate being successful in this role.

      Job Overview

      Reporting to the Head of EU Sales and Marketing, the Sector Sales Manager will own and grow Grayson Thermal Systems’ business within the stationary power and data centre back-up power markets. The role requires proven hands-on sector experience, an established network of relevant contacts and the credibility to engage at generator set and battery energy storage OEMs, system integrators, data centre developers and operators. You will develop and execute the sector sales strategy, build and convert a strong opportunity pipeline, and secure profitable long-term business for Grayson in this growing market sector. This is a technical, specification-led sales role involving long sales cycles, requiring close collaboration with Engineering, Programme Management, Quality and Supply Chain. Sector experience is critical to the candidate being successful in this role FOR MORE INFORMATION AND TO APPLY THROUGH LINKEDIN: https://www.linkedin.com/jobs/view/4481717990/

      Responsibilities

      • Develop and implement a sector sales strategy and annual business plan for stationary power and data centre back-up power, identifying target customers, applications, market segments across the UK and Europe.
      • Set and deliver clear objectives for revenue, margins, pipeline development and order / contract delivery in line with company growth plans.
      • Identify new business opportunities with generator set, back-up power, battery energy storage, UPS and power system OEMs and system integrators.
      • Build, qualify and manage the opportunity pipeline from first engagement through quotation, technical approval, negotiation and order placement.
      • Develop strategic account plans for priority customers and build long-term relationships that lead to repeat orders, long term programme commitment and framework business.
      • Systems capability: Proficient in Microsoft 365 and CRM systems; experience of HubSpot or equivalent would be beneficial.

      Experience

      • Minimum five years' proven sales or business development experience within stationary power and/or data centre back-up power sector, for example generator sets and standby power, battery energy storage, UPS and power systems, or data centre cooling and infrastructure.
      • An established network of relevant contacts across OEMs and system integrators.
      • Excellent communication, interpersonal, presentation and negotiation skills.
      • Willingness and ability to travel regularly within the UK and internationally.
      • Experience using CRM and sales forecasting tools to manage account activity, pipeline and performance.
      • Knowledge of thermal management, heat exchange, liquid cooling, cooling systems or HVAC technologies.

      Our offer to you

      • Flexible / hybrid working policy between office and home.
      • Flexibility will be required when travelling and meeting with customers.
      • Any reasonable hours to ensure targets and objectives are met.
      • Competitive salary and performance related bonus scheme.
      • Employer Pension scheme contribution.
      • 25 days annual leave (plus statutory bank holidays).
      • Access to Employee Assistance Program.
      • Free on-site parking
      • Office operating hours of either: 08:00-17:00 / 08:30-17:30 Mon-Thu 08:00 - 13:00 / 08:30 - 13:30 Fri

      Apply Now

      To apply, please email your CV, along with the name of the position you are applying for, to employment@graysonts.com.

      1978 – 2026

      48 years of growth

      Interested in joining Grayson Thermal Systems? Learn more about us, from our humble beginnings in the heart of England to our global expansion and innovative product developments.

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      Products

      We work with you to provide thermal management solutions that meet your needs, no matter what the application. Discover our product ranges today.

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      Downloads

      Looking for more information? From product brochures to detailed technical specifications, all our literature is easily and freely accessible at our Downloads Centre.

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      Sectors

      From innovative electric-powered and hydrogen-powered buses to retrofit solutions for off-highway applications, we have the experience and expertise to meet the needs of your application.

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