Principal Mechanical Engineer, Water Sector

Overview

In this role you will lead mechanical design for water and wastewater projects within the South West and Wales water team, contributing to multi‑billion capital programmes across the UK. You will work with multidisciplinary teams to shape innovative, sustainable water solutions from concept to delivery, engaging with clients and contractors to ensure technical quality and successful delivery. The position offers exposure to large frameworks and a strong emphasis on collaboration, development, and impact. This is a chance to influence critical water infrastructure and growth within a global engineering firm.

Pay / Benefits

• career development opportunities
• technical practice networks
• AECOM University
• volunteering days
• flexible hybrid working model
• well-being programs

Responsibilities

• Develop feasibility studies, outline and detailed designs, and provide construction support
• Create design drawings, select mechanical plant, and prepare technical specifications
• Collaborate with civil, electrical, process, and mechanical engineering teams
• Ensure high technical quality, contribute to bids, and maintain client relationships
• Manage project budgets, schedules, and deliverables to meet targets
• Design mechanical installations for water and wastewater systems (pumps, screens, valves, odour control)
• Conduct site surveys and liaise with clients, contractors, and suppliers
• Produce layouts, technical specifications, datasheets, and P&IDs for system designs
• Collaborate with Enterprise Capabilities centres in India, South Africa and Romania

Key requirements

• Degree in Mechanical Engineering (or equivalent)
• Chartered Engineer status or working towards it (IMechE or equivalent)
• Proven expertise in pump station design, piping design, valve selection, hydraulics
• Experience in the water and/or wastewater industry

• collaboration
• client relationship management
• communication
• pump station design
• piping design
• valve selection

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