Mechanical Field Service Engineer

United Utilities’ (UU) purpose is to deliver great water for a stronger, greener and healthier North West of England. We are committed to providing our services in a way that respects the environment, supports the economy, and benefits society.

We value diversity, inclusion and innovation in our workplace, and we foster a culture where our people can grow, excel, and be themselves.

We uphold our ethics, values and business model to fulfil our mission and, by setting clear goals and objectives, we create sustainable long-term value for our colleagues, customers and communities. Whether you work with a team that shares your vision or join a network of peers with similar interests, you will find a welcoming and supportive organisation to be part of.

We’ve got a lot to offer. You’ll be part of a thriving FTSE 100 company and will enjoy a range of core benefits that reflect your value and value contribution.

Benefits

• A generous annual leave package of 26 days, which increases to 30 days after four years of service (increases one day per year), in addition to 8 bank holidays
• A competitive pension scheme with up to 14% employer contribution, 21% combined, and life cover
• Up to 7.5% performance-related bonus scheme, as well as recognition awards for outstanding achievements
• A comprehensive healthcare plan through our company-funded scheme
• MyGymDiscounts – gym and wellness benefit that offers up to 25% off on gym memberships and digital fitness subscriptions
• Best Doctors
• Salary Finance
• Wealth at Work courses
• Deals and discounts
• EVolve Car Scheme
• Employee Assistance Plan
• Mental health first aiders
• ShareBuy
• MORE Choices flexible benefits
• Enhanced parental leave schemes

The Role

As a Field Service Engineer (Mechanical), you’ll deliver expert maintenance and technical support to ensure mechanical systems and powered assets operate safely, efficiently, and reliably. Your work plays a vital role in supporting high-quality water and wastewater services, with a strong emphasis on renewable energy generation through anaerobic digestion.

This is a hands-on, multi-skilled role that demands flexibility, the ability to work independently, and readiness to operate in confined spaces. You’ll also contribute to both capital and operational projects, ensuring mechanical assets are designed, installed, and maintained to meet performance and reliability standards. Participation in an out-of-hours standby rota is part of the role.

Key Accountabilities

You’ll operate across a defined geographical area, supporting mechanically powered sites—including anaerobic digestion and dewatering plants—with a strong emphasis on safety, compliance, mechanical performance, and energy efficiency. Working within United Utilities’ Health & Safety framework, your responsibilities will include:

• 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.

Essential Skills & Experience

To be considered for a role as a Mechanical Field Service Engineer:

• 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.

This role may not be eligible for visa sponsorship.

Additional Information

We are currently seeking a skilled Mechanical Engineer to join our team, with a clear and supported pathway to develop Electrical or Instrumentation engineering capabilities. This role is offered initially as a single-skilled position, with the opportunity to upskill into a flexi-skilled role through our comprehensive in-house technical training programme. Upon successful completion of training and competency sign-off in the secondary discipline, the role will transition to a flexi-skilled position. The starting salary for this role is £38,462, with progression to £44,320 once fully trained and signed off in the secondary skill. This is an excellent opportunity for career development within a supportive and forward-thinking engineering environment.