Tom Sangster is an experienced professional civil engineer and project manager. He has over 30 years’ experience in:

  • Civil and geotechnical engineering worldwide and is an acknowledged industry leader and expert in geosynthetics – market information and analysis, design in all applications and product specification.
  • Underground pipe networks – market information, inspection, condition assessment, rehabilitation and asset management of existing water, wastewater, gas and industrial pipe networks, pipe materials and risk management.

Tom has presented papers at many international conferences in his fields of expertise and also provides a range of technical training courses, especially in the pipe network assessment and rehabilitation sectors.

Tom takes the role of Project Director for all of Downley Consultants’ projects with responsibility for ensuring that projects fully meet the clients’ needs.

Qualified for the job

Tom Sangster’s professional qualifications and experience.

Nationality: Swiss/British

Years of Experience: >30

B.Sc., (Hons) Civil Engineering, University of Surrey (UK), 1978.

Masters in Business Administration, Warwick Business School (UK), 1996.

Professional Registration:
Member of the Institution of Civil Engineers

Chartered Engineer since 1983

Professional Affiliations:

  • Senior Member BSI, CEN and ISO Technical Committees on Geosynthetics.
  • Former President CHSTT
  • Former Council Member UKSTT
  • Former Council Member UK Chapter IGS


English, French, German, Swiss-German.

Key Capabilities:

  • Market & competitive research, intelligence and analysis.
  • Pipeline inspection & condition  assessment.
  • Geosynthetics engineering.
  • Sewer & water main rehabilitation & liner design.
  • Contract & risk management.
  • Expert witness.

Associate Consultants Team

Downley Consultants has created a group of independent Associate Consultants with a wide range of specialist expertise and knowledge. All are acknowledged leading experts in their specific fields and bring many years of accumulated experience to our Clients’ projects. Their areas of expertise are combined in Project Teams created especially to complement each other and cover all aspects of each project thoroughly and to the highest professional standards.

In total, the team comprises 12 Associate Consultants located in the USA, Canada, UK, Europe, Australia and the Middle East.

Areas of associates' expertise


  • Reinforced soil wall design
  • Solutions & designs for geosynthetics-based foundations over voids & soft soils
  • Water, gas and hazardous liquid containment with geomembranes
  • Storm & surface water management
  • Geosynthetic drainage system design and solutions
  •  Slope stability

Underground Utility Networks

  • Leak detection in water distribution & trunk mains – including DMA monitoring
  • Non-revenue water management & minimisation
  • Corrosion analysis and protection
  • Hydraulic modelling
  • Failure analysis
  • Complex non-circular sewer liner design
  • Pipe-soil interaction