Design Engineer

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 Customer & Field Support 


• 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 

Contact & Next Steps: 

If you feel excited by being part of this dynamic working environment and you think your personal skills and qualities match the job requirements, we would love to hear from you before the application deadline by submitting your application through the careers portal. We aim to keep you updated on the progress all the way. 

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

Our recruiting tool recognises the time zone where the job ad has been published and closes the application period according to same time zone.  

Last application date: 30/10/2026 

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.