Building Tomorrow Together

Your Trusted Partner in Civil Engineering Excellence and Sustainable Infrastructure Solutions


Wind and Hydro renewable experts

Green Cat Contracting is a small and growing Civil Engineering contractor who specialise in Design and Build Balance of Plant contracts to serve the renewable energy market.

We are experts in the delivery of medium scale onshore wind energy projects up to around 25MW, and smaller scale hydro schemes up to around 1MW, and can also use our wide ranging knowledge to deliver a range of other specialist civil engineering and groundworks projects such as weir works, fish passes, pipelines and drainage works. We are an ISO, RISQS, Achilles and Living Wage accredited contractor.


Partners in perfection.

By working closely with our sister companies Green Cat Renewables, Green Cat Renewable Developments and Green Cat Geotechnical, we are in the unique position of being a Principal Contractor that can proactively and efficiently share internal familiarity of the entire project process from conception to completion.

This presents optimum value for clients by allowing us to work in an inherently collaborative environment.


Our Team

The perfect combination of experience, knowledge and expertise.

Sam Hunter
Senior Project Manager

Sam is an experienced Project Manager who has been working in the industry since graduating from the University of Paisley in 2001, giving him 21 years’ experience in the Civil Engineering sector. He is responsible for the management of contractors, liaising with designers, landowners, and clients on Green Cat Contracting’s live projects. Sam is currently working on our biggest wind turbine project to date, which is very complex due to challenging ground conditions at our Greengairs East Wind Farm.

Gavin Catto

Gavin established Green Cat Contracting in January 2013, following over a decade of experience in the renewables industry developing wind, small-scale hydro and solar projects. He decided to establish a Civil Engineering company to deliver the projects conceived with his background in electrical engineering. With a PhD in wind turbine generator design, his broad base of expertise includes project feasibility assessment and optimisation, project management, commercial risk assessment, environmental assessment, resource assessment, grid connection negotiation and design. In his time as director of Green Cat, Gavin has overseen the delivery of over 800MW of renewables projects.

Harry McGurnaghan
Construction Manager

Harry joined Green Cat Contracting in 2014 to lead the Green Cat Contracting team. Harry graduated from Edinburgh University with MEng (Hons) in Civil Engineering and Construction Management and has over 17 years’ experience within the civil engineering industry managing a wide range of projects. After graduating with an honours degree, he returned part time to Strathclyde University to complete a Masters in LLM Construction Law. He has successfully delivered projects across the UK ranging from single turbine sites to major wind farms and hydro schemes. Harry oversees all aspects of the construction phase from developing tenders, input to the design, discussions and negotiations with landowners and clients, overseeing the delivery of turbines and the co-ordination of the various construction elements across the business.

Scott Pearson
Operations Manager

Scott joined Green Cat Contracting in 2014 as our Operations Manager with over 20 years’ experience of managing the delivery of a wide range of civil engineering projects. Scott is responsible for the organisation of resources and labour, and the operational management of all of Green Cat Contracting’s live projects.

John Dye
Finance Manager

Due to the business expanding, John joined Green Cat Contracting in April 2022 in our new role of Finance Manager. John graduated from University of Stirling with a Bachelor of Accountancy with Honours and is a member of the Institute of Chartered Accountants of Scotland. He has over 21 years’ experience of managing the finances of a wide range of Companies including those with a portfolio of civil engineering, 100+ employees and turnover in excess of £10m. John is responsible for all company financial matters, including supporting our project staff successfully deliver our live projects.

Stewart Izatt FRICS
Senior Quantity Surveyor

Stewart is a driven and pro-active Senior Quantity Surveyor with over 35years’ experience in both the pre and post contract stages of complex projects including all aspects of commercial management both in the UK and internationally. Stewart has particular expertise in the areas of Cost Control as well as Site Management. Stewart has worked on numerous high value projects in various denominations including 200Billion AED, $2Billion and >£150Million.

Our projects


Fully Qualified and Accredited.