United Infrastructure Ltd
Mechanical Fitter
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About Us
As part of the United Infrastructure Group, we are a dynamic and innovative specialist engineering services, solutions and products provider focused on servicing our clients’ immediate and future needs. We do this through the development of industry-changing cleantech products as well as through engineering delivery excellence.
We specialise in the design and delivery of process, mechanical, electrical and ICA engineering-based projects, products and solutions. Regardless of the project, they all pursue the same goal: to improve the efficiency and sustainability of our water, wastewater and waste treatment.
We have a team of highly skilled and experienced professionals with extensive consulting and contracting experience, including engineers, scientists and commercial managers. Our knowledge and expertise spans more than 30 years, across industries including: water, wastewater, marine, energy and power sectors. At AFECO, we cover all stages of the innovation and project delivery cycle from concept through to operations.
Our aim is simple – to provide the most effective solutions and products on the market and thus, exceed clients expectations through market-leading technology. From technical through to commercial and management expertise, we have the in-house expertise to execute a range of projects from the most basic to highly complex.
Job Title
Mechanical Fitter
Be part of who we are
United Infrastructure is a dynamic and rapidly expanding business, focused on delivering critical infrastructure projects, across the utility and social infrastructure sectors.
Our team of highly skilled and hardworking specialists deliver innovative solutions to the complex challenges our clients face.
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Our company is split into two business areas:
Utility Infrastructure
Our team of Utility Infrastructure specialists design, build and maintain critical water, energy (gas), power and telecoms infrastructure, for the UK’s largest network owners and operators.
Social Infrastructure
Our team of Social Infrastructure specialists revitalise homes and communities by carrying out a wide range of work, from retrofit to refurbishment, and maintenance.
Purpose of Job
As a Mechanical Fitter you will carry out planned, preventative, and reactive mechanical maintenance across water and wastewater treatment assets. The role ensures the reliability, performance, and regulatory compliance of equipment used in the abstraction, treatment, distribution, and discharge of water.
Specific Responsibilities
Mechanical Maintenance & Repairs
- Perform routine PPM (Planned Preventative Maintenance) on pumps, valves, gearboxes, motors, screens, clarifiers, and associated plant.
- Respond promptly to breakdowns, diagnose mechanical faults, and carry out corrective actions to minimise downtime.
- Install, overhaul, and commission mechanical equipment in line with specifications and industry standards.
- Conduct pipework repairs including flanged, threaded, and welded systems.
Health, Safety & Compliance
- Work to site safety rules, including permit-to-work, confined space entry, and lock-out/tag-out procedures.
- Ensure maintenance tasks align with water industry regulatory standards (e.g., DWI, EA, OFWAT where relevant).
- Maintain high housekeeping and hygiene standards, especially in potable water environments.
Operational Support
- Support engineers and operations teams with asset optimisation and equipment upgrades.
- Assist in shutdowns, plant outages, and installation projects.
- Keep accurate maintenance records using Total mobile/asset management systems.
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Continuous Improvement
- Identify opportunities to improve asset reliability and performance.
- Provide feedback on recurring failures and assist in root-cause analysis.
- Support implementation of reliability-centred maintenance practices.
Criteria
Technical Skills
- Strong mechanical fault-finding and problem-solving ability.
- Ability to read technical drawings, P&IDs, and OEM documentation.
- Skilled in maintaining rotating machinery (pumps, blowers, mixers, compressors).
- Experience with mechanical seals, bearings, alignment, and coupling systems.
- Knowledge of water/wastewater treatment processes (preferred).
Personal Attributes
- Good communication and teamwork, working alongside operators, engineers, and contractors.
- Ability to prioritise work, especially during breakdowns.
- Strong safety awareness and compliance-led mindset.
Qualifications & Experience
Essential
- Recognised mechanical engineering qualification (NVQ Level 3 / City & Guilds / apprenticeship or equivalent).
- Proven experience as a Mechanical Fitter or Maintenance Technician.
- Experience in an industrial, utilities, or process-plant environment.
- Confined space training (NC1/NC2).
Desirable
- Experience within the water or wastewater industry specifically.
- Water hygiene card (EUSR).
- IOSH Working Safely or similar safety qualification.
- Welding or fabrication skills
Join Us at AFECO
Be part of our mission to deliver innovative and sustainable solutions to the complex infrastructure needs of the UK.
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