Primary Design Engineer

Mitie Group plc.; Olney; On-site; GBP 35,000 - 50,000; Full time

Job summary

A leading engineering firm in the UK is seeking an experienced Design Engineer specializing in HV/EHV substations. You will be responsible for producing detailed electrical layouts and ensuring compliance with national and international standards. The ideal candidate will have a degree in Electrical Engineering and proven experience in primary electrical design. This role offers the opportunity to lead projects, mentor junior staff, and work collaboratively with multidisciplinary teams.

Qualifications

• Degree/HND/HNC in Electrical Engineering with a focus on Power Systems is preferred.
• Proven experience in primary electrical design for HV/EHV substations.
• Strong understanding of industry standards including BS7671 and ENATS.

Responsibilities

• Primary Design Engineering for HV/EHV AC substations.
• Produce electrical layouts for substations and cable routes.
• Design and analysis of earthing systems for renewable energy sites.

Skills

Primary electrical design

Technical documentation management

Busbar calculations

Complex design interfaces

Risk assessments

Education

Degree/HND/HNC in Electrical Engineering

Tools

3D CAD tools (e.g., Revit)

Earthing modelling software (CDEGS)

Job description

Responsibilities

• Primary Design Engineering for HV/EHV AC substations (11kV-132kV), including AIS and GIS.
• Produce electrical layouts for substations, cable routes, LV systems, switchrooms, and control rooms.
• Design and analysis of earthing systems for substations, renewable energy sites (solar, wind, battery), and grid connections - with support from the earthing engineer.
• Perform soil resistivity testing, EPR studies, touch/step voltage assessments, and lightning risk assessments.
• Develop technical specifications for major electrical plant and ensure compliance with British and International Standards.
• Interface with multidisciplinary teams (structural, planning, CAD) and manage external design suppliers.
• Ensure compliance with CDM Regulations 2015, embed safety and sustainability by design.
• Mentor junior engineers and contribute to team development.

Qualifications

• Degree/HND/HNC in Electrical Engineering (Power Systems preferred).
• Proven experience in primary electrical design for HV/EHV substations and BoP projects.
• Strong knowledge of industry standards: BS7671, ENATS, NGTS, BS EN 61936-1, BS7354, etc.
• Familiarity with G81 standards and DNO-approved equipment registers.
• Ability to manage complex design interfaces and produce accurate technical documentation.
• Proficiency in busbar calculations, earthing layouts, and risk assessments.
• Working knowledge of CDM Regulations and designer responsibilities.
• Desirable: Experience with 3D CAD tools (e.g., Revit) and earthing modelling software (CDEGS).