Mechanical Design Engineer

Help grow a safer, cleaner, healthier future for everyone, every day.

Develop innovative, high‑quality fire detection products that combine performance, manufacturability, regulatory compliance, sustainability, and cost efficiency. Contribute directly to life‑safety technology used globally.

As a Mechanical Design Engineer, you will be responsible for delivering robust mechanical designs for high‑volume safety‑critical products. You will work across the full development lifecycle—from concept, simulation, and prototyping through testing, verification, regulatory approval, and production handover.

Accountabilities

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• Deliver robust, cost‑optimised mechanical designs on time and within budget.
  
• Work with Project managers to define implementation plans and deliver against them.
  
• Ensure all designs comply with quality, manufacturing, and regulatory standards (including UKCA/CE and EN 54).
  
• Drive innovation in materials, sustainability, and manufacturing processes.
  

Authorities

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• Check and approve mechanical designs, drawings, and supporting documentation.
  

Responsibilities – Essential

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• Design high‑volume plastic injection‑moulded components and small metal fabrications.
  
• Create innovative mechanical solutions optimised for manufacture, assembly, reliability, sustainability, and ease of installation.
  
• Ensure that existing designs are managed and supported through their lifecycle.
  
• Perform DFMEAs and drive corrective actions to eliminate risk.
  
• Prepare detailed 3D CAD models and 2D drawings using SolidWorks.
  
• Use our PLM system to manage design data, change processes, and control configuration management.
  
• Participate in prototyping activities, engineering evaluations, and physical testing.
  
• Support regulatory and environmental testing with Labs and Compliance teams.
  
• Apply sustainability‑led design principles (DfE, eco‑design, materials optimisation).
  
• Collaborate cross‑functionally with Electronics, Compliance, Software, Manufacturing, and Programme teams.
  

Responsibilities – Desirable

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• Experience defining mechanical architecture at the system level (interfaces, structure, materials).
  
• Execute simulations: FEA (static/dynamic), CFD, tolerance analysis, mouldflow, or ray‑tracing.
  
• Familiarity with Model‑Based Definition (MBD).
  
• Knowledge of digital engineering methods, simulation automation.
  
• Understanding of modern automated and smart manufacturing technologies.
  
• Ability to support continuous improvement initiatives and introduce new technologies.
  

Leading yourself

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• Good Communication skills - Listening and giving honest, constructive feedback.
  
• Trusts and empowers staff to make decisions and be the best that they can be.
  
• Practices a coaching/mentoring ethos.
  
• Builds and promotes teamwork.
  
• Is effective at managing relationships.
  
• Effectively manages emotions and impulses, showing or restraining certain emotions depending on what is necessary and beneficial for the situation.
  
• Has the drive to improve and achieve, taking initiative, being assertive, optimistic when facing setbacks, and resilient.
  
• Has effective social skills of managing relationships in a way that benefits the company.
  
• Is innovative and solutions‑driven towards all business challenges.
  
• Shows change agility: Is agile and responsive to change, seeks out new and first‑time experiences.
  
• Shows results agility: Performs well in all situations using skill, resourcefulness, and inspiring teams to deliver top results.
  
• Learns from mistakes and finds value in criticism.
  
• Shows resilience and persistence.
  

Technical Requirements Of The Position

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• Advocate for Continuous Improvement, actively participating in team or business improvement, supporting team‑oriented activities and demonstrating collaborative interaction.
  
• Ensure all concessions or official changes released through the business are managed and implemented timely and concisely, inform and train others, and maintain controlled records.
  
• Communicate essential information, present and report results clearly, concisely, and timely.
  

Development Responsibilities

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• Support development of new fire detection technologies and enhancements to existing designs.
  
• Ensure continuous professional development to maintain technical competence.
  
• Engage in design reviews, lessons learned sessions, and engineering process improvements.
  

Career Development & Progression

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• Opportunities to contribute to mechanical architecture decisions.
  
• Potential to mentor junior engineers.
  
• Involvement in cross‑functional technology development initiatives.
  

Health, Safety and Environment

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• Adhere to all health, safety and environmental standards per company procedures, challenge and report all issues and concerns, and maintain required PPE.
  

Companywide Responsibilities

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• Follow documented procedures in all instances, process transactions with clarity and accuracy, and pursue improvement and process changes consistent with protocol.
  
• Live our Genes.
  
• Act in compliance with GDPR, exercising discretion and confidentiality, and escalating concerns where applicable.
  

The duties and responsibilities in this job description are not restrictive and you may be required to undertake any other duties from time to time. Any such duties should not, however, substantially change the general character of the post.

If you are motivated by challenge and thrive in a fast‑paced environment, we want to hear from you. Join Team Apollo where everyone has the opportunity to make a difference.

We are happy to talk flexible working.

Just so you know, we review CV’s as we receive them, and interview as soon as we have applications that look like a good match. Please apply as soon as possible to avoid missing out on this role.

If you require any accommodations or adjustments for the interview, please do not hesitate to reach out to the hiring manager when asked to schedule an interview. We strive to create an inclusive and welcoming environment for all candidates and celebrate individuals being their authentic selves within a working environment.

Benefits Package *Role dependent

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• Flexi‑start and finish times (1 pm finish on a Friday available) *
  
• Optional 9‑day fortnight*
  
• 50/50 office and home working*
  
• Buying/selling holiday
  
• 14 weeks of paid parental leave (new parents) and phased return to work for those parents that take extended leave (maternity, adoption leave)
  
• Training and professional development
  
• Employee Bonus Scheme*
  
• Pension scheme with an employer contribution of 10.5% (subject to conditions)
  
• Non‑contributory Share Scheme (Halma shares have shown sustained performance growth) *
  
• BUPA for eligible employees*
  
• Health cash plan – contribution towards health care costs
  
• EAP Workplace options
  
• Life insurance – 3 times salary and up to 6 times if you have dependents
  
• Long service awards and additional holiday
  
• 24/7 support Healthline
  
• Participation/sponsorship for volunteering & charitable events
  
• Benefits for engineers as an IET Enterprise Partner
  
• Free electric car charging
  
• Free onsite parking
  
• Subsidised canteen
  

We do not seek or accept unsolicited resumes or CVs from recruitment agencies. We are not responsible for, and will not pay, any fees, commissions, or other payments related to unsolicited resumes or CVs except as required in a written contract between Apollo and the recruitment agency or party requesting payment of a fee. Any CVs that are not submitted through the Workday portal will not be considered.

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