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Mechanical Test Engineer

Confidential

Portsmouth, Hampshire permanent

Posted: March 4, 2026

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Quick Summary

Mechanical Test Engineer: Designs and develops high-performance watercraft and systems for commercial and defence applications.

Job Description

Salary: £40,000 - £50,000 DOE

Full Time

Permanent

Who we are: SubSea Craft is a fast growing, privately-funded, UK-based innovative maritime technology company specialising in next-generation, high-performance watercraft and systems. We operate at the intersection of advanced engineering, cutting-edge design, and user-centric innovation, delivering safe, effective, and enabling solutions for both commercial and defence applications.

What we offer:

Annual Leave – Entitlement to 25 days of annual leave plus bank holidays

Wellbeing Day - An additional Wellbeing Day each year to focus on personal health and wellbeing.

Private Healthcare – Access to comprehensive private healthcare coverage to support your physical and mental wellbeing.

Life Assurance and Critical Illness Cover – Comprehensive protection including Life Assurance (4x salary) and Critical Illness Cover for added financial security.

Family Leave – Enhanced maternity and paternity pay

Christmas Leave – A Christmas shutdown is typically observed.

Professional Development – Commitment to ongoing learning and career growth, supported by training programmes and access to LinkedIn Learning.

Pension Contribution – pension scheme with the option to contribute via salary sacrifice

Flexible Working – Opportunities for flexible working arrangements to promote work–life balance.

Inclusive Culture – A professional environment that values diversity, innovation, and collaboration.

Responsibilities will include:

Leading the development and execution of engineering prototype test activities  

Manage the development of prototype test procedures, ensuring that all test procedures are developed in line with the system requirements  

Creation and management of comprehensive test documentation to fully capture and communicate all test activities, non-compliances, results and recommendations, to feed into the design cycle and quality management system  

Development of bespoke test solutions, in order to validate prototype products meet customer requirements  

Working flexibly with the engineering and operations teams to ensure test results and documentation is delivered on time  

Identify and propose solutions to address gaps in prototype testing capabilities  

Leading the implementation of the highest safety standards for test and evaluation  

Working collaboratively with established partner organisations to deliver robust integration of test plans within defined timelines  

Qualifications and Experience:

Required:

Degree level qualification in Mechanical / Electrical Engineering or similar  

Any additional qualifications or certifications in the areas of safety, lifting, process control, fluid power, technical documentation, pressure systems, environmental testing, high and low voltage electrical assembly / test are all desirable  

Professional registration (e.g. CEng) or progression towards is advantageou

Test and validation experience, both physical test and theoretical analysis  

Comfortable using hand tools to assemble and test prototype equipment.  

Demonstrable history of excellent technical communication, both written and verbal  

Maritime experience is a plus, but whatever your track record, high levels of technical expertise, personal drive and strong communication skills are particularly important.  

Experience of safe assembly and testing of pressure systems, including fluid power, would be beneficial.  

Knowledge and experience of data acquisition and instrumentation  

Experience in the use of CAD / CAM software and the operation of CNC machines would be beneficial.  

Note: Due to the nature of work undertaken at SubSea Craft, the selected candidate must be capable of meeting the security requirements of the position, which would include as a minimum existing right to live and work in the UK, Baseline Personnel Security Standard (BPSS), with UK National security clearance required for certain roles.*

Values: Our people are our greatest asset, we continually strive to provide an excellent working environment to enable our team to do their best work. We have an agile professional workforce: we are founded on the belief that our people are valued and our business is trusted, inclusive and commercially-adept.

What we expect from you:

Teamwork, mutual respect and collaboration

Initiative and independent working

Honesty and integrity

Business and commercial awareness

Agility, adaptability and continuous development

 

We are committed to building an inclusive, diverse workplace where everyone can thrive. If you require any support or adjustments to interact with us, please let us know.

 

*Please note that all offers of employment are conditional and subject to satisfactory DBS, driving licence and reference checks. A criminal record will not automatically disqualify candidates from employment. We will consider criminal record information alongside the wider range of evidence gathered at the application, interview, and pre-employment checking stages.

Due to the high volume of applications, we are unable to respond to everyone. If you are shortlisted, we will aim to contact you within 14 days of your application or the closing date (if stated). We may retain your details for future suitable roles unless you advise us otherwise.

 

For details of how we process your personal data, please refer to our Privacy Notice.

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