Hydro-Logic is now part of Hydro International.

Management Team


Our management team are experienced professionals- capable of providing high level advice on the full portfolio of HLS projects in water resources, flood services and hydrometry.

Colin Fenn (BA, PhD, C Sci, C.WEM, FCIWEM)


Colin has been with the team at HLS since 2006 and became MD in 2011. Colin has a vast range of past experience and provides expert, specialist input to the team. 

  • Chaired CIWEM's Water Resources Expert Panel for 12 years
  • Inaugural reporter on the water sector and on the flood and coastal management sector for the Institution of Civil Engineers' State of the Nation report, from 1999-2004
  • Member of the Institution of Civil Engineers review panel, 2012-2013
  • On the British Hydrological Society National Committee 2005-2012 
  • Former Managing Director at Atkins Water and HR Wallingford
  • Over 40 published papers on water resources and flood management
  • Honorary Research Fellow and Lecturer at Oxford Brookes University
Colin has provided high-level advice and consultancy services to: numerous water companies, the Environment Agency, Ofwat, DEFRA, UKWIR, National Audit Office, Greater London Authority, Parliamentary Environmental Audit Committee, WWF-UK, World Commission on Dams, Athens Water Company (for the 2004 Olympic Games).

Eliot Simons (BA (Hons), MSc, MCIWEM, C.WEM, MAPM)

Head of Consultancy Operations

Eliot Simons 

Eliot joined Hydro-Logic Services in 2017 as Head of Consultancy Operations. He has a large amount of experience in Project and Program Management, Strategic Planning, Water Resources Planning and Hydrology, both in the UK and internationally. His experience includes providing expert advice and consultancy services to water companies, the environment agency, and a wide range of private clients including Planners, Architects, Aggregate Companies, Consultants, and Developers.  

Member of the Chartered Institute of Water and Environmental Management since 2002

Member of the Association for Project Management since 2006

Key clients include: Thames Water, South East Water, Wessex Water, Environment Agency, and the Ministry of Agriculture, Irrigation and Water Development, Government of Republic of Malawi.


Rob Burton (BSc, C.WEM, MCIWEM)
Head of Hydrometric Services


Rob began his career here at HLS and was appointed Head of Hydrometry in 2011. Rob established a new office for the company in Sheffield, 2010 and has been based there since.

  • Lead specialist on MCERTs and flow measurement audit/compliance
  • Significant role in developing consultancy services in Stirling
  • Active member of the British Hydrological Society in the Pennines
  • Manager and technical lead for a major project to improve compensation and abstraction flow monitoring for Scottish Water at over 155 sites throughout Scotland
Rob has considerable experience working with a number of major water companies: Severn Trent Water, Anglian Water, Thames Water, South East Water, Southern Water and Scottish Water.