Warren Hornsey Pr. Eng.

Warren is Professional Civil Engineer and has worked in the civil engineering field in Africa, Europe and Australia.

With specialist experience in geosynthetic research & development and design of structures involving geosynthetics, Warren has been active in the geosynthetic field since 1997.

His experience covers a diverse range of geosynthetic applications from landfill lining to reinforcing and coastal protection. He has published over 17 peer reviewed technical papers relating to geosynthetic design and application. He serves as Chairman of Standards Australia CE20 Geosynthetics and is a Council member of the International Geosynthetics Society (IGS).

Joel Sprague P.E.

Joel is a long-time member of the senior technical staff of TRI Environmental, Inc. specializing in research, development, and application of geosynthetics, plastic pipe, and erosion and sediment control technologies.

He is co-chair of the subcommittee on mechanical properties in the ASTM D35 Committee on Geosynthetics. He is also actively involved in ASTM D18.25 Subcommittee on Erosion and Sediment Control.

Joel is an internationally recognized expert in the fields of geosynthetic engineering design and product development. He serves as a Senior Engineer for TRI providing internal technical consulting, performance testing and design review project management.

Joel also manages TRI’s large scale erosion control and hydraulics testing facility.

Sam Allen

Sam is Vice President of TRI Environmental, Inc., an international, independent third party geosynthetics testing and research firm.

TRI provides routine materials testing services as well as specialized durability and in-application engineering performance investigations.

Presently he serves as the Immediate Past-Chairman of the American Society for Testing and Materials (ASTM) Committee D35 on Geosynthetic Materials. Sam received the ASTM Award of Merit in 2010 and holds the status of ASTM Fellow. He also serves as the Convenor of ISO TC221, Working Group 5 on Geosynthetic Durability.   He is also currently serving the IGS Council as the Chair of the Education Committee, with special projects related to Council support and comparisons between test procedures and standards.

John Allen P.E.

John is Director of TRI’s Soils-Geosynthetics Interaction Laboratories at TRI Environmental, Inc.

In this role, John is directly responsible for literally hundreds of slope stability related friction tests per year. In addition, he leads all research and development efforts related to slope stability and friction testing at TRI. John has served as the Task Group Chairman for ASTM D 6243, Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method.

John also has construction quality control experience and practiced in North and South America. Current research efforts include the National Science Foundation earthquake investigation in Christchurch, New Zealand, and bentonite compatibility with mining and MSW leachates.

Abigail Beck P.E.

Abigail is a Senior Engineer for TRI Environmental, Inc. and directs Liner Integrity and Leak Location services worldwide.

Abigail has performed and overseen over 500 thousand square meters of various soil-covered, water-covered and exposed liner surveys. Her contribution to the field of liner integrity includes numerous published technical papers, educational seminars, field training and presentations world-wide.

She is an expert in the leak location equipment available by TRI/environmental for rent on a project-specific basis.