Principal Mechanical Design Engineer (Mission Critical)

Lusona Consultancy (Financial) Limited; Motherwell; On-site; GBP 63,000 - 75,000; Full time

Job summary

A global contractor in energy and industrial transitions seeks a Senior or Principal Mechanical Design Engineer in Motherwell, Scotland. You will design mechanical systems for mission critical projects, collaborating closely with teams and clients. Required qualifications include a degree in Mechanical Engineering and experience in HVAC systems. The role offers a competitive salary up to £75,000 and a range of benefits, including a discretionary bonus and private medical insurance.

Benefits

Bonus - Discretionary

Car Allowance

25 days annual leave + public holidays

Life Cover (4 times annual salary)

Company Stakeholder Pension Scheme

Private Medical Insurance (including Family Cover)

Corporate social responsibility days

Learning opportunities including professional qualifications

Employee Referral Rewards Scheme

Employee networks access

24/7 Employee Assistance Program

Qualifications

• Degree qualified in Mechanical Engineering or relevant subject.
• Proven experience in mechanical design engineering within mission critical sectors.
• Strong technical knowledge of HVAC and chilled water systems.

Responsibilities

• Develop detailed mechanical designs for HVAC and specialist systems.
• Support project delivery from concept to construction.
• Collaborate with internal teams and clients for design integrity.

Skills

Mechanical design engineering

HVAC systems

Project management

Communication

AutoCAD

Revit

IESVE

Hevacomp

Education

Degree in Mechanical Engineering or relevant subject

Tools

AutoCAD

Revit

IESVE

Hevacomp

Job description

Client Overview

Our exclusive client is a global contractor leading in energy, digital, and industrial transitions, delivering bespoke solutions across infrastructure, buildings, and processes. With a strong presence in the UK and internationally, this organisation is renowned for its commitment to innovation, sustainability, and operational excellence. The company operates across a diverse portfolio, including data centres, clean rooms, pharmaceutical facilities, and other mission critical environments, ensuring high-performance engineering solutions that meet the most demanding standards.

Role Overview

Our client is looking for an ambitious Senior or Principal Mechanical Design Engineer.

You will play a key role in the design and delivery of mechanical systems for mission critical projects. Reporting to the Head of Mechanical Design, your responsibilities will include:

• Developing detailed mechanical designs for HVAC, chilled water, and specialist systems.
• Supporting project delivery from concept through to construction and commissioning.
• Collaborating with internal teams, clients, and external consultants to ensure design integrity.
• Conducting technical reviews, calculations, and system simulations.
• Assisting in mentoring junior engineers and contributing to continuous improvement.

You will be involved in high-value, technically complex projects where precision and reliability are paramount.

Requirements

• Degree qualified in Mechanical Engineering or other relevant subject.
• Proven experience in mechanical design engineering within mission critical sectors.
• Strong technical knowledge of HVAC, chilled water systems, and cleanroom design.
• Excellent proficiency in industry standard design tools such as AutoCAD, Revit, IESVE, Hevacomp, etc.
• Excellent project management and communication skills.
• Chartered Engineer status or working towards it (CEng, IMechE or equivalent) is desirable.

Benefits

• Up to £75,000 per annum (DoE)
• Bonus - Discretionary
• Car Allowance
• 25 days annual leave + public holidays
• Life Cover (4 times annual salary)
• Company Stakeholder Pension Scheme
• Private Medical Insurance (including Family Cover)
• 2 corporate social responsibility days per year
• Broad range of learning opportunities, such as professional qualifications, collective/individual training, and personalised support programmes
• Attractive Employee Referral Rewards Scheme
• Access to employee networks
• 24/7 Employee Assistance Program and access to mental wellbeing app

Next Steps

If you're interested in this opportunity, please submit your updated CV or reach out to Lusona Consultancy for a confidential conversation.

If this role isn’t quite the right fit but you’re exploring new opportunities in mechanical design or mission critical sectors, Lusona would be happy to assist you in finding the perfect match.