Mechanical Field Service Engineer – Water & Biogas Systems

United Utilities; Oldham; On-site; GBP 35,000 - 42,000; Full time

Benefits offered by this job

Competitive salary

Annual bonus scheme

Company pension scheme with up to 14%

26 days’ holiday + bank holidays

Membership discounts

Job summary

United Utilities’ Saddleworth Wastewater Treatment Works in Oldham is seeking a Mechanical Field Service Engineer to maintain and repair mechanical systems, support renewable energy targets, and ensure safe operation in confined spaces. The role is hands-on and requires independence as well as teamwork, with involvement in capital and operational projects.

The position is permanent, full-time (37 hours/week) and onsite, offering a competitive salary and a benefits package as described by UU.

Qualifications

• You must be a time served apprentice or equivalent, supported with academic qualifications to a minimum of NVQ level 3.
• A full UK driving license is required for the role.
• Industry experience.
• The ability to work in a team but also alone, and sometimes in confined spaces.
• Able and willing to diversify into specialised areas of maintenance, as required, such as chlorine gas systems.
• Diagnostic, organisational, planning, communication and computer skills.

Responsibilities

• Performing planned and reactive mechanical maintenance across multiple sites, ensuring all work is completed safely, efficiently, and within required timeframes.
• Acting as the Person Controlling the Works (PCW) for mechanical activities carried out by framework contractors, ensuring full compliance with safety protocols, quality standards, and budgetary controls.
• Collaborating with the Process Controller to ensure mechanical systems support optimal telemetry alarm settings and visibility of asset performance.
• Maintaining accurate and up‑to‑date mechanical asset data and maintenance records within corporate systems to support operational decision‑making.
• Supporting environmental compliance by ensuring mechanically powered assets meet Environment Agency regulatory standards.
• Minimising downtime and supporting biogas energy targets by identifying root causes of mechanical inefficiencies and implementing long‑term, sustainable solutions.
• Contributing to contingency planning by ensuring critical mechanical spares are available at high‑risk sites, particularly those involved in resource recovery.
• Coordinating and supporting contractors during mechanical project delivery or site interventions, ensuring work is well planned, risk‑assessed, and aligned with operational needs.

Skills

Time served apprentice

Full UK driving licence

Indust ry experience

Team & solo work ability

Willing to specialise maintenance

Diagnostic & planning skills

Education

NVQ Level 3 or equivalent

Job description

United Utilities’ Saddleworth Wastewater Treatment Works in Oldham is seeking a Mechanical Field Service Engineer to maintain and repair mechanical systems, support renewable energy targets, and ensure safe operation in confined spaces. The role is hands-on and requires independence as well as teamwork, with involvement in capital and operational projects.

The position is permanent, full-time (37 hours/week) and onsite, offering a competitive salary and a benefits package as described by UU.