Mechanical Engineer
BH-548483
Posted: 01/10/2026
- Competitive
- England South East Greater London
- Permanent
-
Water Treatment
Mechanical Engineer
Location: UK
Employment Type: Permanent
Sector: Water & Environmental Infrastructure
Our client, a leading engineering and infrastructure organisation, is seeking an experienced Mechanical Engineer to support the delivery of major water and wastewater treatment projects across the UK.
This is an excellent opportunity to join a growing project team delivering complex Design & Build schemes from concept through to construction and commissioning. The successful candidate will play a key role in the design, specification, procurement and delivery of mechanical systems for critical water infrastructure projects.
The Role Working as part of a multidisciplinary engineering team, you will be responsible for the technical delivery of mechanical engineering activities throughout the project lifecycle. You will contribute to the design and specification of treatment plant equipment, support procurement activities, provide construction support and assist during commissioning and handover phases.
Key Responsibilities
Mechanical Design & Engineering
Essential
With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.
Location: UK
Employment Type: Permanent
Sector: Water & Environmental Infrastructure
Our client, a leading engineering and infrastructure organisation, is seeking an experienced Mechanical Engineer to support the delivery of major water and wastewater treatment projects across the UK.
This is an excellent opportunity to join a growing project team delivering complex Design & Build schemes from concept through to construction and commissioning. The successful candidate will play a key role in the design, specification, procurement and delivery of mechanical systems for critical water infrastructure projects.
The Role Working as part of a multidisciplinary engineering team, you will be responsible for the technical delivery of mechanical engineering activities throughout the project lifecycle. You will contribute to the design and specification of treatment plant equipment, support procurement activities, provide construction support and assist during commissioning and handover phases.
Key Responsibilities
Mechanical Design & Engineering
- Develop and review mechanical engineering designs and technical documentation.
- Produce and review P&IDs, equipment datasheets and technical specifications.
- Support process and hydraulic design activities.
- Ensure engineering solutions comply with project requirements, industry standards and client specifications.
- Size, specify and select mechanical process equipment.
- Support the technical definition and procurement of equipment including:
- Pumps
- Blowers
- Mixers
- Sludge thickening and dewatering systems
- Chemical dosing systems
- Valves and associated equipment
- Tertiary treatment systems
- Coordinate with Process, Civil and EICA engineering teams.
- Participate in multidisciplinary design reviews and technical workshops.
- Ensure mechanical requirements are incorporated into project models, drawings and documentation.
- Prepare technical enquiry documentation and equipment specifications.
- Evaluate supplier quotations and technical submissions.
- Support equipment package development and procurement activities.
- Liaise with suppliers and subcontractors throughout project delivery.
- Provide technical support during installation and construction phases.
- Assist with inspections, testing and commissioning activities.
- Resolve engineering issues arising during project execution.
- Support handover and operational readiness activities.
- Identify engineering risks and opportunities for optimisation.
- Contribute to quality, cost and programme objectives.
- Support the implementation of efficient and innovative engineering solutions.
Essential
- Degree qualified in Mechanical Engineering or a related discipline.
- Minimum 5 years' experience within the water or wastewater treatment sector.
- Strong understanding of mechanical equipment used within treatment facilities.
- Experience producing engineering documentation, equipment specifications and P&IDs.
- Knowledge of mechanical equipment procurement and supplier engagement.
- Experience supporting construction, installation and commissioning activities.
- Excellent communication and stakeholder management skills.
- Experience delivering projects under Design & Build or NEC contract environments.
- Chartered Engineer status or working towards professional accreditation.
- Previous experience coordinating with multidisciplinary engineering teams.
- Understanding of target-cost project delivery models.
- Opportunity to work on high-profile UK water infrastructure projects.
- Exposure to the full project lifecycle from design through commissioning.
- Long-term career development within a growing engineering organisation.
- Competitive salary and comprehensive benefits package.
With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.