H&MV Engineering

H&MV Engineering is a specialist in high-voltage electrical engineering, providing mission-critical infrastructure to support the transition to low-carbon energy systems across the UK and EU.

Since Exponent’s investment, H&MV has experienced rapid growth and transformation. The company has grown from 240 employees at acquisition to over 1,300 today, scaling its operations in line with demand for green infrastructure. Alongside commercial expansion, H&MV has embedded a strong ESG ethos across its operations, making it a recognised leader in sustainable engineering.

With private capital support, H&MV has accelerated the build-out of renewable energy infrastructure, supporting 6.12GW of projects that collectively avoid an estimated 4.69 million tonnes of CO₂ emissions. The business has invested in innovation, developing lean engineering practices and a carbon calculator that have reduced the carbon footprint of its substation builds by 80.5%.

H&MV has also taken a leading approach to talent and inclusion in a traditionally male-dominated sector. Through the introduction of graduate and apprentice programmes, the number of women in engineering roles has grown from 0 to 8. Female representation overall has increased from 11% to 19%, well above the industry average of 9%, with a short-term target of reaching 25%. The in-house Sustainability Team, built from scratch since investment, now comprises four specialists driving environmental progress across the business and supply chain.

The firm’s ESG progress has also been externally recognised, achieving a two-grade improvement in its CDP (Carbon Disclosure Project) rating in just one year and securing 2nd place in the national Great Place to Work Awards. H&MV’s ESG Roadmap is now supporting its wider supply chain to improve performance, while a science-based target for Scope 3 emissions is being developed for 2025.

This growth and impact have been underpinned by investment in technology, people, and processes. With Exponent’s backing, H&MV has embedded ESG as a core driver of competitiveness, client trust and long-term value. The business is now a key enabler of the green and digital transitions, supporting a cleaner, more resilient electricity grid across Europe.