Mechanical Field Service Engineer – Wastewater & Biogas

United Utilities; Oldham; On-site; GBP 34,000 - 46,000; Full time

Benefits offered by this job

26 days annual leave (30 after 4 years

Pension up to 14% employer contribute

Performance bonus up to 7.5%

Healthcare plan

EVolve Car Scheme

Employee Assistance Plan

Job summary

United Utilities is seeking a Mechanical Field Service Engineer to deliver hands-on maintenance and technical support across our mechanical assets, including anaerobic digestion and dewatering plants. You will operate within UU’s Health & Safety framework to ensure safety, performance, and energy efficiency, while supporting environmental compliance and energy targets.

Based in Oldham, the role involves working across a defined area, taking part in a standby rota, and coordinating with

Qualifications

• Time served apprentice or equivalent with academic qualifications to NVQ Level 3 or higher.
• Full UK driving licence is required for the role.
• Industry experience is required.
• Ability to work in a team but also alone, and sometimes in confined spaces.
• Willingness to diversify into specialised maintenance areas, e.g. chlorine gas systems.
• Diagnostic, organisational, planning, communication and computer skills.

Responsibilities

• Performing planned and reactive mechanical maintenance across multiple sites, ensuring work is done safely and within timeframes.
• Acting as the Person Controlling the Works (PCW) for mechanical activities carried out by framework contractors, ensuring safety, quality and budget adherence.
• Collaborating with the Process Controller to support telemetry alarm settings and asset visibility.
• Maintaining accurate mechanical asset data and maintenance records in corporate systems.
• Supporting environmental compliance by ensuring assets meet Environment Agency standards.
• Reducing downtime by identifying root causes of mechanical inefficiencies and implementing long-term solutions.
• Contributing to contingency planning by ensuring critical spares are available at high-risk sites.
• Coordinating and supporting contractors during project delivery or site interventions, with proper planning and risk assessments.

Skills

Driving licence

Teamwork & independence

Diagnostic and planning skills

Education

NVQ Level 3 or equivalent

Job description

United Utilities is seeking a Mechanical Field Service Engineer to deliver hands-on maintenance and technical support across our mechanical assets, including anaerobic digestion and dewatering plants. You will operate within UU’s Health & Safety framework to ensure safety, performance, and energy efficiency, while supporting environmental compliance and energy targets.

Based in Oldham, the role involves working across a defined area, taking part in a standby rota, and coordinating with