Design Engineer

Wärtsilä; Havant; On-site; GBP 42,000 - 64,000; Full time

Job summary

Wärtsilä Defence Solutions Limited seeks a Mechanical Design Engineer in Havant, UK to design and support marine shaftline seal systems for defence and commercial projects. You will perform calculations, develop GA drawings, and collaborate with suppliers and customers throughout the lifecycle.

The role requires a Mechanical Engineering degree, strong CAD skills (Solid Edge), and the ability to communicate effectively with stakeholders.

Qualifications

• Degree in Mechanical Engineering (or equivalent) is required.
• Experience in mechanical design and engineering analysis.
• Proficiency in CAD tools (Solid Edge or equivalent).
• Fluent in English (verbal and written).
• Strong analytical and problem-solving skills.
• Excellent attention to detail and structured approach.

Responsibilities

• Produce GA drawings and detailed designs for shaftline seal installations.
• Perform engineering calculations related to seal performance and system behaviour.
• Support specification and configuration of internally manufactured components; liaise with suppliers.
• Deliver high-quality engineering documentation on time and maintain records.

Skills

Mechanical design experience

Engineering analysis

CAD tools (Solid Edge)

English fluency

Attention to detail

Analytical skills

Communication with customers

MS Office

Education

Degree in Mechanical Engineering (or equivalent)

Tools

Solid Edge

MathCAD

MATLAB

Job description

Wärtsilä is an innovative technology company known for being a forerunner in the Marine and Energy markets. Every day, we – Wärtsilians - put our hearts and minds into turning Wärtsilä's purpose of enabling sustainable societies through innovation in technology and services into reality. Our ultimate aim is to provide increased value to both our customers and society. New, game-changing ideas and continuous improvement have been part of our DNA since 1834. Together, we can create new business opportunities and more sustainable future that we can all be proud of.

We want to transition the world towards a decarbonised and sustainable future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?

At Wärtsilä Defence Solutions Limited (WDSL), we support our customers by delivering integrated systems and products that improve lifecycle efficiency, reduce costs, and minimise risk. Our ambition is to enable a cleaner, more sustainable future through advanced engineering and technology.

We are now looking for a Mechanical Design Engineer to join our Design Engineering team in Havant, UK. This role offers the opportunity to work on naval and commercial marine projects, with a strong focus on defence applications.

Role Overview

You will be responsible for the design, analysis, and lifecycle support of marine shaftline seal systems. The role combines detailed engineering design, calculation work, supplier collaboration, and customer support.

What will you be doing?

Design & Engineering

• Produce General Arrangement (GA) drawings and detailed designs for shaftline seal installations
• Develop design solutions that meet technical and project requirements
• Ensure designs comply with engineering standards and data control processes

Analysis & Validation

• Perform and support engineering calculations related to seal performance and system behaviour
• Contribute to technical assessments and design validation activities

Supplier & Product Support

• Support specification and configuration of internally manufactured components
• Liaise with suppliers and manufacturers to ensure technical requirements are met
• Provide technical support during installation, commissioning, and servicing of seal assemblies
• Assist customers throughout the product lifecycle with technical expertise

Documentation & Delivery

• Deliver high‑quality engineering documentation on time
• Maintain accurate product data and records
• Support continuous improvement of engineering processes and tools

To be successful in this role, we expect you to have:

Essential

• Degree in Mechanical Engineering (or equivalent)
• Experience in mechanical design and engineering analysis
• Proficiency in CAD tools (e.g. Solid Edge or similar)
• Ability to effectively communicate with both internal and external customers.
• Strong analytical and problem‑solving skills.
• Excellent attention to detail with a structured and methodical approach to work tasks.
• Fluency in the English language, both verbal and written.
• Competency in the use of normal office software such as MS Excel, Word and Outlook.

Desirable

• Experience in marine equipment, seals, or bearing
• Knowledge of seal design or mechanical calculations
• Familiarity with shock calculations
• Experience with MathCAD, MATLAB, or similar tools
• Understanding of composite materials
• Marine industry experience (preferred)

Security Requirements

Candidates must be eligible to obtain the required level of security clearance for this role.

Why you and us?

• Work on cutting‑edge marine and defence engineering projects
• Be part of a global organisation focused on sustainability and innovation
• Access ongoing training, development, and career growth opportunities

Last application date: 30/10/2026

In case you have any questions about the open position, please contact the hiring manager: Dan Cunnington, Design Engineering Manager, [e-mail]

At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job‑relevant merits and abilities.

Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country.

This is Wärtsilä

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com.