Electrical Design Engineer

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.

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.

Role overview  

The Electrical Design Engineer is responsible for producing safe, compliant, and cost-effective electrical designs for water and wastewater treatment projects. This includes LV power distribution, MCCs, ICA interfaces, standby generation, cabling, lighting, and integration with process and MEICA systems. The role supports feasibility, outline design, detailed design, construction support, and commissioning phases. 

Key Responsibilities 

Electrical System Design 

• Develop electrical engineering designs for water and wastewater assets including: 

• LV power distribution systems 

• Motor control centres (MCCs) 

• Variable speed drives (VSDs) 

• Control panels & ICA integration 

• Pumping systems 

• Chemical dosing and treatment process equipment 

• Earthing and bonding systems 

• Cable calculations, routing, and containment 

• Lighting, small power, and emergency systems 

• Standby generators and UPS systems (where applicable) 

• Prepare design deliverables such as: 

• Single line diagrams (SLDs) 

• Load schedules and discrimination studies 

• Cable sizing calculations 

• Control philosophies 

• Electrical layouts and schematics 

• Equipment specifications and datasheets 

• Bills of materials 

Technical Assurance & Compliance 

• Ensure designs comply with relevant standards, including: 

• BS EN standards 

• Water industry design specifications 

• Wiring regulations (BS 7671) 

• CDM regulations 

• Functional safety requirements (where applicable) 

• Apply safe-by-design principles and participate in HAZOP, HAZCOM, and risk reviews. 

• Conduct design reviews, value engineering, and optimisation. 

Collaboration & Project Delivery 

• Work closely with civil, mechanical, ICA, and process engineers to ensure integrated MEICA designs. 

• Provide electrical input at all project stages (feasibility, outline design, detailed design, construction). 

• Support the procurement process by preparing technical specifications and evaluating supplier proposals. 

• Provide design support during installation, testing, and commissioning. 

• Engage with subcontractors, OEMs, and supply chain partners. 

Documentation & Quality Management 

• Produce high-quality engineering documentation and ensure version control and traceability. 

• Contribute to O&M manuals, asset information, and as-built documentation. 

• Ensure designs meet internal and client quality processes and digital delivery requirements (e.g., BIM Level 2). 

Innovation & Continuous Improvement 

• Contribute to development of standard designs, templates, and best practices. 

• Support adoption of new technology such as smart MCCs, digital monitoring, and energy-efficient solutions. 

• Identify opportunities for optimisation and carbon reduction. 

Skills, Competencies & Experience 

Essential 

• Strong background in electrical engineering within the water/wastewater industry or similar process industries. 

• Experience designing LV electrical systems and MCCs for treatment works or pumping stations. 

• Competence in electrical calculations, discrimination studies, and cable sizing. 

• Ability to interpret P&IDs, process drawings, and equipment data sheets. 

• Proficiency with electrical design software/tools (AutoCAD, Solidworks). 

• Understanding of ICA systems and coordination with control/automation engineers. 

• Good communication skills and ability to work collaboratively in multi-disciplinary teams. 

Desirable 

• Experience working with major UK water companies and AMP frameworks. 

• Knowledge of DNO/G99 requirements for generation or large motor loads. 

• Experience with hazardous area classifications (ATEX/DSEAR). 

• Understanding of digital design platforms (e.g., Revit, BIM 360, CDEs). 

• Experience in site surveys, testing, commissioning, or inspections of electrical installations 

Qualifications 

Essential 

• Degree or HNC/HND in Electrical Engineering or a related discipline. 

• Knowledge of BS 7671 and relevant electrical standards. 

• Full UK driving licence. 

Desirable 

• Chartered or working towards Chartership (IET or similar). 

• EUSR Clean Water Hygiene. 

• COMPEX (for sites with hazardous areas). 

• IOSH/NEBOSH training or other health & safety qualifications 

Personal Attributes 

• Strong problem-solving and analytical mindset. 

• Detail-oriented and committed to producing quality work. 

• Proactive, organised, and able to manage multiple projects simultaneously. 

• Good communication and stakeholder management skills. 

• Committed to safety, sustainability, and continuous improvement. 

Some of our benefits include:

• Career development – from the moment you join, you’ll be supported to develop, grow your skill set and progress your career the way you want.
• Cultivate – access to our idea and innovation platform, empowering you to drive positive business change.
• Cycle to work scheme
• Discounts – access to our leisure and shopping discounts and rewards platform.
• Employee networks – opportunity to join our organisation wide employee networks such as our Veteran’s network, Women’s network, and Young People’s network which is dedicated to supporting and retaining employees in the early stages of their careers and empowers young employees and future leaders through Continuous Professional Development (CPD), Social Value and Team Building initiatives.
• Health and Wellbeing Support – access to our employee programme which includes access to a virtual GP and Dentist, mental health support and counselling, fitness and nutrition, and financial and legal advice.
• Health Cash Plan
• Holiday purchase scheme
• Payroll Giving – the opportunity to donate regularly from your gross pay to support charities of your choice.
• Pension – you will be eligible to join our pension scheme which we will also contribute to.
• Personal Support Network – you will receive a dedicated buddy and mentor and will join an early careers community of peers that will support you forward every step of the way.
• Reward and Award Schemes – access to our long service awards and above and beyond rewards.
• Social Value – you will be encouraged to support social impact activities each year to support charities and local community organisations.