Principal Mechanical Engineer

Overview

In this role you will lead mechanical design for Scotland’s water and wastewater projects within our high-impact Water Team. You will shape feasibility and detailed design, collaborate across disciplines, and drive delivery on large-scale programmes like the SR27 Enterprise for Scottish Water. You’ll guide design reviews, lead mechanical workstreams, and support programme and budget targets while mentoring junior engineers. This is a unique chance to influence sustainable, resilient water systems at scale and contribute to Scotland’s infrastructure legacy.

Pay / Benefits

• flexible hybrid working
• volunteering days
• AECOM University
• technical practice networks
• flexible benefits
• well-being programs

Responsibilities

• Prepare feasibility studies, outline design, detailed design and construction support
• Create plant layouts, mechanical drawings and specifications including WIMES data sheets and schedules
• Collaborate with civil, electrical, process and mechanical teams nationwide
• Perform site surveys and liaise with clients, contractors and suppliers
• Lead and participate in design review meetings (HAZOPs, HAZIDs, ALMs, SWIFTS)
• Act as Mechanical Lead on WwTW, WTW and infrastructure projects
• Support Project Manager and Design Lead to deliver mechanical scope on time and within budget
• Line manage Mechanical Graduates, Engineers and Senior Engineers

Key requirements

• Degree in Mechanical Engineering
• Chartered Engineer with a relevant institution (e.g., IMechE)
• Proven ability to deliver engineering designs, reports, drawings, specifications and calculations
• Hands-on experience delivering water and wastewater engineering projects

• Leadership and people management
• Collaborative teamwork
• Effective communication with multi-disciplinary teams
• Mechanical design for water/wastewater projects
• P&IDs, valve and equipment schedules
• WIMES data sheets and hydraulic headloss calculations

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