Principal Mechanical Engineer, Water

Overview

As Principal Mechanical Engineer in our Water Team, you will lead mechanical design for water and wastewater projects, guiding multi-disciplinary delivery from feasibility to construction. You’ll collaborate with clients, contractors and internal teams to deliver compliant, high-quality solutions at scale. Your work shapes infrastructure that supports communities and aligns with AECOM’s digital and design standards. This role offers a chance to influence projects across the UK&I and advance the firm’s water strategy.

Pay / Benefits

• flexible hybrid working model
• career development opportunities
• AECOM University
• volunteering days
• well-being programs
• inclusive workplace

Responsibilities

• Lead the mechanical design for wastewater and water infrastructure projects
• Conduct site surveys and liaise with clients, contractors and suppliers
• Design pumping stations, headloss calculations, pump selection, screens, grit removal, penstocks and valves
• Develop odour control systems, plant and pipework layouts, and technical specifications/reports
• Engage in all design stages (Feasibility to Construction) ensuring standards compliance
• Collaborate with other discipline teams and communicate with clients throughout the design and planning phases
• Mentor junior staff, delegate tasks and support bid preparation and management
• Deliver high-quality designs within budgets and timelines for diverse clients
• Review client deliverables: calculations, drawings and technical reports to standards
• Support and shape AECOM’s digital design offerings (BIM, Projectwise, intelligent P&IDs, in-house tools)
• Contribute to project delivery and client engagement across the Water portfolio

Key requirements

• Extensive design experience in large-scale water engineering projects with multi-disciplinary knowledge
• BEng or MEng in a related engineering field with water/wastewater experience
• Chartered Member of a relevant Professional Institution
• Proven experience in team leadership, mentoring and line management
• Experience managing projects, delegating tasks and mentoring teams
• Strong collaboration and coordination skills with clients and stakeholders

• collaboration
• mentoring
• effective communication
• pumping station design
• headloss calculations
• pump selection

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