Senior Mechanical Design Engineer - Water & Wastewater

Carrington West; Lenham; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

Carrington West is seeking a Senior Mechanical Design Engineer to take a leading role on water and wastewater projects. Hybrid work arrangement requires a minimum of 3 days per week in office or site, and you will own mechanical design packages from concept to completion, ensuring regulatory, safety and client requirements are met.

You will mentor junior engineers, influence best practice, and drive innovation across projects while collaborating with multidisciplinary teams during design,

Qualifications

• Degree in Mechanical Engineering.
• CEng status or working towards.
• Proficiency in AutoCAD or SolidWorks.

Responsibilities

• Lead the design and development of mechanical systems for water and wastewater treatment projects.
• Take ownership of designs from concept through to detailed design and delivery.
• Produce and review technical documentation, calculations, and specifications.
• Collaborate with multidisciplinary teams to ensure integrated design solutions.
• Conduct and support design reviews, risk assessments, and HAZOPs.
• Provide technical support during procurement, installation and commissioning.
• Ensure compliance with industry standards, HSE requirements and regulations.
• Mentor and support junior engineers within the team.
• Drive innovation, efficiency, and continuous improvement across projects.

Skills

Leadership

Mentoring

Problem solving

Communication

Team collaboration

Education

Degree in Mechanical Engineering

CEng candidate

Tools

AutoCAD

SolidWorks

Job description

Senior Mechanical Design Engineer - Water & Wastewater

Location: Hybrid (minimum 3 days per week in office/site)

Type: Permanent

The Role

An excellent opportunity has arisen for a Senior Mechanical Design Engineer to take a leading role within a growing design team, delivering high-quality mechanical solutions across a range of water and wastewater treatment projects. You will take technical ownership of mechanical design packages from concept through to completion, ensuring all systems meet regulatory, safety, and client requirements. Working closely with multidisciplinary teams, you will deliver fully integrated solutions while supporting project delivery through design, procurement, installation, and commissioning stages. This role also offers the opportunity to mentor junior engineers, influence best practice, and drive innovation and continuous improvement across projects.

Key Responsibilities

• Lead the design and development of mechanical systems for water and wastewater treatment projects
• Take ownership of designs from concept through to detailed design and delivery
• Produce and review technical documentation, calculations, and specifications
• Collaborate with multidisciplinary teams to ensure integrated design solutions
• Conduct and support design reviews, risk assessments, and HAZOPs
• Provide technical support during procurement, installation, and commissioning
• Ensure compliance with industry standards, HSE requirements, and regulations
• Mentor and support junior engineers within the team
• Drive innovation, efficiency, and continuous improvement across projects

Experience Required

• 7-10 years' experience in mechanical design engineering
• Ideally within the water or wastewater sector
• Proven track record delivering mechanical designs on treatment or process-led projects
• Strong knowledge of mechanical equipment such as pumps, pipework, valves, blowers, and filtration systems
• Experience supporting commissioning, troubleshooting, and optimisation of systems

Skills & Competencies

• Strong leadership and mentoring capabilities
• Excellent problem-solving skills with a practical, solution-focused approach
• Ability to manage multiple projects while maintaining quality and accuracy
• Strong communication skills with the ability to engage stakeholders at all levels
• Collaborative approach, working effectively across multidisciplinary teams
• Good understanding of mechanical design standards, HSE, and environmental regulations

Qualifications

• Degree in Mechanical Engineering or a related discipline
• Chartered Engineer (CEng) status or working towards
• Proficiency in design software such as AutoCAD, SolidWorks, or similar