Senior Mechanical Design Engineer – Water / Wastewater
Salary / Contract Options
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Up to £65,000 per annum depending on experience and working arrangements
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Day Rate Negotiable, OUTSIDE IR35
Working Arrangements
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Office or site based role
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Full time office based with flexibility
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Occasional site visits with travel expenses paid
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Working from home available on an occasional basis by prior agreement
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Hybrid working option of one to three days per week for a strong candidate
Project Overview
You will be working on technically complex projects across the UK water and wastewater sector, including:
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UMON upgrade schemes at sewage treatment works
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Pumped storm storage schemes at CSOs and sewage treatment works
Key Responsibilities
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Produce mechanical design deliverables that meet safety, quality, and regulatory requirements
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Prepare detailed design calculations and drawings for water industry projects
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Direct, mentor, and develop CAD technicians, junior designers, and graduate engineers
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Prepare scopes of work for subcontract mechanical and electrical design teams and review their outputs
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Liaise with equipment suppliers and manufacturers to develop technical solutions
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Prepare design investigations, technical reports, and specifications
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Ensure designs comply with relevant technical, professional, and industry standards
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Ensure all design changes are fully implemented and formally recorded
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Estimate design hours for project delivery and support project planning
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Attend and present at design meetings, reviews, and technical workshops
Candidate Requirements
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Minimum of 10 years relevant design experience within the UK water industry
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Significant experience in hydraulic design
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Good awareness of electrical design and control systems
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Degree or HND qualification, or equivalent experience
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Strong IT skills and experience using engineering design tools
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Registered with a relevant professional body and working towards chartership