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.

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.

• Electrical System Design
  • Develop electrical engineering designs for water and wastewater assets including LV power distribution systems, Variable speed drives (VSDs), 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), 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. 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). Contribute to development of standard designs, templates, and best practices. Support adoption of new technologies such as smart MCCs, digital monitoring, and energy‑efficient solutions. Identify opportunities for optimisation and carbon reduction.
• Industry Experience
  • 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. 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…