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14 January 2026

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New leadership for Scottish quarry group

6 days Scotland’s Hillhouse Quarry Group has a new chief executive and a new managing director.

Alistair Borthwick, new CEO of Hillhouse Quarry Group
Alistair Borthwick, new CEO of Hillhouse Quarry Group

Alistair Borthwick has been recruited by Hillhouse Quarry Group to be chief executive, while Mark has been promoted to managing director.

Borthwick joins the business from NATS (formerly) National Air Traffic Services, where he was chief financial officer. NATS provides air traffic control services to 14 UK airports so he brings experience of guiding complex organisations.

Current managing director of Hillhouse Quarry Group, Robert McNaughton, is retiring in April after nearly two decades in senior leadership roles within the family-run business.聽

Under McNaughton鈥檚 leadership, Hillhouse has grown from an Ayrshire-based business into one of the largest privately owned companies in Scotland. He has overseen major strategic and operational change and, in his final year, the business achieved a place in the top 100 private companies in Scotland.

Strengthening the leadership changes, Mark Munro has been promoted to managing director of Hillhouse Quarry Group. He has been with the company for more than 25 years, most recently as commercial director.聽

Mark Munro, now managing director
Mark Munro, now managing director

Andrew Vernon, chairman of Hillhouse Group, said: 鈥淩obert鈥檚 contribution to Hillhouse over the past 18 years cannot be overstated. He has been instrumental in transforming the organisation and has championed a strong culture focused on people, innovation and operational excellence.聽

鈥淎s we look to the future, the appointments of Alistair and Mark reflect both our commitment to continuity and our ambitions for the next chapter. Alistair brings strategic and financial leadership and a forward-looking perspective, while Mark鈥檚 deep operational experience will ensure stability for our people and our customers. Together, they are exceptionally well positioned to lead Hillhouse Group into the future.鈥

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