Our experts

Our expert Hydro-Logic Service consultants have vast experience in the water industry and unrivaled specialist expertise of water management issues.

Our expert consultants have vast experience in the water industry and unrivalled specialist expertise of water management issues.

Mark Smith (MSc MA (Cantab) MIAM MCIWEM C.WEM CEnv)

Expertise: Water Resources

Mark joined Hydro-Logic Services in 2018 as Head of Water Resources. Mark specialises in water resources planning and management, and has significant associated experience developing water business plans and applying asset management practices.


  • Water resources modelling and forecasting
  • Aquator modelling
  • Member of the Chartered Institute of Water and Environmental Management
  • Member of the Institute of Asset Management
  • Member and Deputy Chair of the CIWEM Water Resources Expert Panel

Jonathan Hay 

Expertise: Monitoring and Measurement

Jonathan joined the team in 2019 as Business Manager and has since moved into the role of Head of Hydrometric Services.  Jonathan oversees all aspects of the national hydrometric monitoring business ensuring safe and efficient project delivery.

He began his career with the Royal Air Force before progressing to project engineering and project management roles within the oil and gas and construction industries. 


  • Operational delivery for clients across the UK
  • Continuous improvement of health and safety performance
  • Project management

George Smith (BSc Hons)

Expertise: Client Delivery

George joined Hydro-Logic Services as Head of Client Delivery in June 2019, bringing with him 30 years of experience of environmental data collection and technical studies for environmental assessment, engineering design and planning for a variety of river and coastal projects.  


  • Data collection and study development for clients in a wide range of sectors:
    • Water industry
    • Renewables
    • Marine cables
    • Dredging
    • Quarries
  • Representation at meetings and trade fairs in Europe, the Middle East, China and South Africa

Stewart Child (BSc, MSc, DIC)

Expertise: Hydrometry

Stewart is the longest serving member of the HLS team, having joined in 1993, and his experience is unparalleled. Stewart was the company's director from 1995-2007 and now holds the title of Principal Consultant.

As the lead hydrometric specialist in the company, Stewart provides expert input to a wide range of clients: government organisations, aid agencies, Environment Agency, Scottish Environment Protection Agency, Office of Public Works, Thames Water, Severn Trent Water and Dwr Cymru Welsh Water.  


  • Heavily involved in hydrometry standards through membership of the British Standards Committee on Hydrology, CEN (European) Committee on Hydrology and ISO (International Standards) Sub-Committee
  • 17 published papers on water resources and hydrometry
  • Overseas project experience in Botswana, Zambia, Malawi, Namibia, Southern Africa, Hong Kong, Western Samoa, India, Palestine, Republic of Ireland


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