Contractor job HV Plant CDAE

We are seeking an experienced HV Plant CDAE Engineer to support high-voltage substation projects across the UK. This role is ideal for a seasoned professional with National Grid experience, looking for flexible working arrangements and a contract outside IR35.

• Lead or support Control, Design and Engineering (CDAE) activities for HV substations (typically 132kV to 400kV).
• Develop and review single line diagrams, schematics, wiring diagrams, and layout drawings.
• Ensure designs comply with National Grid TP standards, ENA guidelines, and relevant BS/IEC standards.
• Collaborate with project teams to deliver design packages, technical specifications, and engineering reports.
• Provide technical input during design reviews, site surveys, and commissioning phases.
• Liaise with stakeholders including National Grid, contractors, and consultants to ensure alignment and compliance.
• Support CDM and safety requirements throughout the design lifecycle.

• Proven experience in HV plant design and CDAE roles.
• Strong working knowledge of National Grid specifications and procedures.
• Familiarity with AutoCAD, Engineering Base, or similar design tools.
• Understanding of protection and control systems, SCADA, and telecommunications in HV environments.
• Ability to work independently and manage deliverables to tight deadlines.
• Excellent communication and documentation skills.

• Chartered Engineer status or working towards it.
• Experience with AIS/GIS substations, transformer bays, and busbar configurations.
• Knowledge of Grid Code, G99, and system studies.

Please click to find out more about our Key Information Documents. Please note that the documents provided contain generic information. If we are successful in finding you an assignment, you will receive a Key Information Document which will be specific to the vendor set-up you have chosen and your placement.

To find out more about Progressive please visit

Progressive Recruitment, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC387148 England and Wales