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Principal Mechanical Engineer

Edinburgh, gb💼 Full-time🗓 2026-05-21 → 2026-09-26

Core

Lead mechanical design and delivery for large-scale water and wastewater infrastructure projects, including feasibility, detailed design, and construction support.

Role type

Principal Mechanical Engineer (Water Infrastructure)

Builds

Water treatment works (WTW), wastewater treatment works (WwTW), and related infrastructure systems.

Domain

Water and wastewater engineering

Deliverable

production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work

Required skills

Mechanical engineering design, hydraulic calculations, P&ID development, plant layout, specification writing, HAZOP/HAZID leadership, project budgeting, team management

Preferred skills

Chartered Engineer status (IMechE), experience with WIMES Data Sheets, lifting strategies, valve schedules

Technologies

P&ID software, hydraulic calculation tools, design drafting tools

Responsibilities

Prepare feasibility studies, outline design, detailed design and construction support; Produce plant layouts, design drawings, mechanical plant selection, specifications, WIMES Data Sheets, Valve schedules, Equipment Schedules, lifting strategies, hydraulic headloss calculations and P&IDs; Liaise and collaborate with water and other discipline teams; Visit site to carry surveys and support liaisons with clients, contractors & suppliers; Lead and contribute design review meetings such as HAZOPs, HAZIDs, ALMs and SWIFTS; Act as Mechanical Lead on projects including WwTW, WTW and Infrastructure; Assist the Project Manager to set realistic programmes and budgets for Mechanical projects; Be a Line manager for Mechanical Graduate, Engineer and Senior Engineers

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