Specialists in EHV design, commissioning and system integration
Optimi is the Heighway Group’s expert division for Extra High Voltage (EHV) systems. We manage the full lifecycle of EHV infrastructure – from early-stage design and protection studies to commissioning, energisation, and post-completion support.
With a reputation for managing high-risk, high-voltage projects across the UK, our team delivers the critical systems that power substations, networks and grid connections. Our work is rooted in technical detail, risk mitigation, and absolute compliance with safety and regulatory frameworks.
What we deliver
We provide deep expertise across the full scope of EHV infrastructure and commissioning services:
Design and engineering of protection, control and EHV systems
Planning and management of commissioning programmes, up to 400kV
System integration, testing and fault investigation
Supervision of energisation and client handover
SHEQ consultancy and support
Post-commissioning monitoring, maintenance and reporting
We support both principal contractors and distribution network operators (DNOs) in delivering safe, compliant and high-performing electrical systems.
Our process
Our methodology is centred around the unique demands of EHV infrastructure projects – combining structured processes with technical insight.
Design & pre-construction
- Initial Feasibility Studies & Site Surveys
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Conceptual Design - Preliminary Design - Detailed Design
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Pre Construction, Planning & Compliance
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Long Lead Equipment Specification & Procurement
Commissioning planning
- Inspection & Test Plans
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Commissioning Programmes
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Commissioning Process
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Handover & Certification
Delivery & energisation
- Procurement
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Construction Programmes
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Stakeholder management & coordination
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Operational Safety from the system
Post Commissioning & Support
- As built operation & maintenance folders
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Network operator/owner familiarisation training and ongoing technical support
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Extended O&M contract support or management
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Shcheduled preventative maintenance
Why choose Optimi?
Optimi brings precision, structure and deep electrical engineering knowledge to every project. Our team includes highly experienced commissioning managers, system protection engineers, and site supervisors – all trained to manage EHV environments with care and confidence.
Proven delivery on complex, regulated projects
Compliance with National Grid, DNO, and IDNO standards
Dedicated reporting, client engagement and documentation
Integrated with the wider Heighway Group delivery model
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