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Mechanical Design Engineer

Job in New Forest, Lyndhurst, Hampshire County, SO43, England, UK
Listing for: 3D Personnel LTD
Full Time position
Listed on 2026-01-14
Job specializations:
  • Engineering
    Mechanical Engineer, Environmental Engineer
Job Description & How to Apply Below
Position: Mechanical Design Engineer (Permanent)
Location: New Forest

Mechanical Design Engineer – Water / Energy Projects (Southampton)

We’re currently recruiting for a Mechanical Design Engineer to join a growing in-house design team based in Southampton. This is a fantastic opportunity to join a friendly, professional and multi-disciplined team delivering detailed design solutions across energy and water projects in the UK and overseas.

Due to new project awards and a strong forward order book, we’re looking for someone with experience designing within the water and/or energy sectors.

The Role

Reporting into the Mechanical Design Manager, you’ll be responsible for supporting the delivery of mechanical design packages across a range of treatment and infrastructure projects.

Key responsibilities include:

* Working within a multi-disciplined engineering team producing design deliverables for water, wastewater and biosolids treatment plants

* Supporting all stages of mechanical design including site surveys, optioneering, feasibility, detailed design and tender pricing

* Producing procurement specifications for mechanical equipment

* Completing hydraulic calculations and producing detailed construction design drawings

* Managing third-party design outputs and providing design support to installation and commissioning teams

* Liaising with clients, subcontractors and external design resources to ensure compliance with specifications

* Interpreting client requirements from drawings, specifications and technical correspondence

* Working closely with Project Managers and procurement teams to ensure correct plant and equipment selection and purchase

* Managing internal and external design costs in collaboration with the Project Manager

* Undertaking and checking design calculations including hydraulics and pumping systems

* Managing the preparation of CAD drawings in line with company drawing standards

* Completing design risk assessments to support detailed design proposals

* Preparing detailed mechanical specifications

* Producing P&IDs

Requirements

To be considered, you will ideally have:

* BEng or MEng in Mechanical Engineering

* Experience delivering mechanical design within the water and/or energy sector

* Chartered membership of a relevant professional institution (advantageous but not essential)

About the Business

This is an opportunity to join a highly reputable engineering and construction contractor delivering complex EPC projects across the UK and overseas. The business operates across sectors including Process & Water, Energy, Defence, Oil & Gas and Nuclear, providing full lifecycle services from design and manufacturing through to construction, installation and commissioning
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