Gretton will take over on 29 June as the UK’s biggest drainage and wastewater maintenance specialist prepares for its next stage of growth following BlackRock’s investment in the business last year.

Gretton will work alongside Earnshaw to ensure a smooth transition before formally taking charge at the end of June

Earnshaw, who joined Lanes in 1992, oversaw the specialist’s expansion from a 15-strong workforce into a business employing more than 4,000 people with revenue of more than £650m.

He will move into the newly-created role of vice-chairman for strategy.

The leadership handover marks a significant milestone for the privately-owned contractor, which has strengthened its position in the wastewater and infrastructure services market in recent years.

Gretton joins from Telent Technology Services, where she served as chief executive and recently led the business through its sale to M Group. Her background spans the delivery of critical infrastructure services across the UK and Ireland.

Lanes said Gretton brings extensive experience of leading large-scale operational businesses, delivering organisational change and driving shareholder value.

She said: “I’m excited to be joining Lanes Group at such an important time for the business. The company has a strong reputation, fantastic people and a clear commitment to customers. I’m looking forward to building on that as we continue to grow and invest in the future.”

Earnshaw added: “It’s been a privilege to lead Lanes Group and I’m hugely proud of everything we’ve achieved together. I’m delighted that Jo is stepping in as CEO. She brings the right experience, energy and leadership to take the business forward. I’m excited to see her lead Lanes Group into its next chapter.”