Mechanical Design Engineer

Alexander Associates; Greater London; Hybrid; GBP 40,000 - 60,000; Full time

Job summary

A leading engineering contractor in London is seeking a talented Mechanical Design Engineer to develop designs for water and wastewater infrastructure projects. This role offers an excellent opportunity to work on complex schemes and ensure compliance with high standards. Candidates should have relevant experience in the utilities sector and proficiency in design software, with a focus on delivering quality results. The position offers competitive salary and comprehensive benefits.

Benefits

Long-term career development

Comprehensive benefits package

Opportunity to work on high-value projects

Qualifications

• Proven experience within the water, wastewater, or wider utilities sector.
• Strong understanding of pumps, valves, pipework, and rotating equipment.
• Desirable: CSCS / EUSR Water Hygiene certification.

Responsibilities

• Produce and develop mechanical designs from concept to detailed design.
• Prepare technical documents, calculations, and design reports.
• Support design reviews and technical support during construction.

Skills

Mechanical systems knowledge

Excellent communication

Coordination skills

Problem-solving skills

Education

Degree or HNC/HND in Mechanical Engineering

Tools

AutoCAD

3D modelling software

Calculation software

Job description

Mechanical Design Engineer

Location: London area
Employment Type: Permanent
Hybrid Working: Office and flexible working as required

Are you a talented Mechanical Design Engineer looking to develop your career within the water and utilities sector? We are supporting a leading engineering contractor as they continue to strengthen their design and delivery capability across major regional infrastructure programmes.

This is an excellent opportunity to work on technically challenging and high–impact schemes, contributing to the development of essential water and wastewater assets across greater London.

Role Overview

• Produce and develop mechanical designs from concept through to detailed design, ensuring compliance with project specifications and industry standards.
• Prepare technical documents, calculations, schedules, and design reports.
• Work closely with civil, electrical, and process engineering disciplines to deliver fully coordinated designs.
• Support design reviews, HAZOPs, risk assessments, and value engineering activities.
• Provide technical support during construction, commissioning, and handover stages.
• Ensure all design work adheres to the highest health, safety, and environmental standards.

About You

• Degree or HNC/HND in Mechanical Engineering (or equivalent).
• Proven experience within the water, wastewater, or wider utilities sector.
• Strong understanding of mechanical systems, including pumps, valves, pipework, rotating equipment, and associated infrastructure.
• Proficient in relevant design software and tools (e.g., AutoCAD, 3D modelling, calculation software).
• Excellent communication, coordination, and problem–solving skills.
• A proactive approach with a strong focus on quality and efficient delivery.
• CSCS / EUSR Water Hygiene desirable.

What’s on Offer

• Opportunity to work on complex and high–value water infrastructure projects.
• Long–term career development with a market–leading engineering contractor.
• Competitive salary and comprehensive benefits package.
• A strong pipeline of future framework and project work.