Principal Mechanical Engineer, Water

Overview

As Principal Mechanical Engineer in our Water Team, you lead mechanical design for wastewater and water infrastructure, coordinating across disciplines and with clients to deliver high-quality solutions. You will oversee site surveys, pump systems, screens, odour control, and plant layouts, guiding projects from feasibility to construction. You’ll drive digital design adoption (BIM, Projectwise, intelligent P&ID’s) and mentor junior staff while bidding for new work. This role blends technical leadership with cross-team collaboration to uplift communities through sustainable water solutions.

Pay / Benefits

• flexible hybrid working
• career development opportunities
• AECOM University
• volunteering days
• well-being programs
• diversity and inclusion

Responsibilities

• Lead and review mechanical design for water and wastewater projects
• Conduct site surveys and coordinate with clients, contractors, and suppliers
• Design pumping stations, headloss analyses, pump selection, and plant/pipe layouts
• Develop technical specs, datasheets, valve/equipment schedules, and P&IDs
• Support all design stages from feasibility to construction design and ensure standards compliance
• Collaborate with multidisciplinary teams and stakeholders across locations
• Mentor junior staff and delegate tasks
• Lead bid preparation and client interfacing for proposals
• Ensure timely, within-budget delivery of high-quality designs
• Review calculations, drawings, and reports for quality and compliance
• Support and advance AECOM’s digital design strategy (BIM, Projectwise, in-house tools)

Key requirements

• Extensive design experience delivering large-scale water engineering projects
• BEng or MEng in a related engineering field with water/wastewater experience
• Chartered Member of a relevant Professional Institution
• Experience in team leadership, mentoring, and line management
• Project management experience with delegation and client liaison
• Strong collaboration and coordination skills with teams, clients, and stakeholders

• collaboration
• mentoring and leadership
• effective communication with clients and teams
• mechanical design for water/wastewater systems
• pumping systems and headloss calculations
• pump selection and pumping station design

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