Senior Mechanical Design Engineer - Water & Wastewater

Scantec; St Albans; On-site; GBP 65,000 - 90,000; Full time

Job summary

Scantec seeks a Senior Mechanical Design Engineer to join the water and wastewater infrastructure team in St Albans. You will own complex mechanical design packages for major projects and mentor junior engineers.

Responsibilities include hydraulic design, calculations, drawings, specifications, and liaison with suppliers and clients. You will ensure compliance with standards and manage design changes across the project lifecycle.

Qualifications

• 10+ years mechanical design experience in the water sector.
• Significant hydraulic design experience on water/wastewater projects.
• Awareness of electrical design principles and control systems.
• Degree-qualified (Mechanical) with active professional membership or working toward chartership.

Responsibilities

• Produce mechanical design deliverables meeting safety, quality, and regulatory standards.
• Develop designs, calculations, drawings, reports, and specs for water/wastewater schemes.
• Lead CAD technicians and junior engineers; review outputs for accuracy.
• Prepare scopes of work for subcontracted M&E design teams and oversee delivery.
• Liaise with suppliers, manufacturers, contractors, and stakeholders throughout design.
• Ensure designs comply with industry standards and company procedures.
• Manage and document design changes across the project lifecycle.
• Estimate design hours and support planning/resources.
• Contribute to design reviews, client meetings, and technical workshops.
• Collaborate with multidisciplinary teams to deliver integrated solutions.

Skills

Mechanical design

Hydraulic design

Project leadership

Mentoring

Stakeholder management

Multidisciplinary coordination

Technical reporting

Education

Degree in Mechanical Engineering

HND in Mechanical Engineering

Tools

CAD software

MS Office

Job description

Scantec seeks a Senior Mechanical Design Engineer to join the water and wastewater infrastructure team in St Albans. You will own complex mechanical design packages for major projects and mentor junior engineers.

Responsibilities include hydraulic design, calculations, drawings, specifications, and liaison with suppliers and clients. You will ensure compliance with standards and manage design changes across the project lifecycle.