Hydro-Logic is now part of Hydro International.

Senior Staff

Simon Bond (BSc)
Regional Head of Hydrometry (Wales)


Simon was appointed as a regional Head of Hydrometry in 2011 after joining the firm in 2001. Simon's specialises in hydrometric networks and telemetry systems.

  • Manager for Dwr Cymru Welsh Water hydrometric network project, measuring over 100 reservoir level and compensation flow sites 
  • Manager for the AMP5 Severn Trent Water RSA project for over 200 gauging and water quality sites
  • Installation of 36 telemetry rain gauges in urban areas for Yorkshire Water, 2010-2012
  • Scottish Water reservoir inflow monitoring for over 100 sites, 2007-2011
  • Tutor for hydrometric training framework contract for the Environment Agency
Simon has worked with and built strong professional relationships with numerous major water companies: Dwr Cymru Welsh Water, Scottish Water, South Staffordshire Water, Yorkshire Water and Severn Trent Water.


Stewart Child (BSc, MSc, DIC)
Principal Consultant 


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

  • 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
  • Hydrometry training manager/senior tutor, since 1995
  • Overseas projects: Botswana, Zambia, Malawi, Namibia, Southern Africa, Hong Kong, Western Samoa, India, Palestine, Republic of Ireland
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.

Karen Clack (BSc, MSc)
Operations Manager (South East) and MCERTS Manager


Karen joined the HLS team in 2004 after graduating from the University of Reading. She is involved with all aspects of hydrometry, from project management to river flow monitoring and maintaining hydrometric installations.

  • Manages the delivery of the MCERTs programme for monitoring sewerage works outfalls, most notably Yorkshire Water with the successful certification of over 500 works
  • ADCP and current meter gauging
  • Assisting in training of the Wessex Water Hydrometry team

Karen has undertaken extensive hydrometric gauging as part of the AMP5 Framework for Thames Water, South East Water, Portsmouth Water and Veolia Water. Karen also has experience working with large companies such as: Natural England, the Coal Authority and the Environment Agency.


Peter Horne (BSc, MSc)
Head of Hydrometry (Scotland)

Peter has been with HLS since 2009 and specialises in hydrometry, hydrology and surveying. 

  • Consultancy services for renewable energy projects in support of client Controlled Activities Regulations (CAR) licence applications to SEPA
  • Regular flow gauging in river networks throughout Scotland and NW England, to develop stage discharge ratings and low flow studies
  • Installation and maintenance of local authority flood warning sites, totalling 160 sites across Scotland
Peter has worked with a number of local authorities in Edinburgh, Aberdeenshire, Dumfries and Galloway and Falkirk along with energy firms such as SSE and Scottish Power.

Julian Parkin (BSc)
Principal Hydrometric Engineer 






Julian was appointed by HLS in January 2004 and has since been involved in all aspects of hydrometric station design, including reconnaissance, survey, feasibility, design, installation and commissioning.

  • Over 10 years direct experience with the Environment Agency
  • Tutor on the Environment Agency's Hydrometric Training Programme
  • Expert technical and auditing input for Dwr Cymru Welsh Water Hydrometric Monitoring Framework project
  • Site and data quality assurance for HLS hydrometric networks
Julian has worked with a number of high-profile clients such as: Severn Trent Water, Canal Authorities, Scottish Power, City of London Authority, Veolia Water and the Scottish Environment Protection Agency.