Management Team

Jari Kaukonen - Vice Chairman - FiSTT

Jari Kaukonen - Chairman - FiSTT

Jari Kaukonen is a B.Sc. (CE) and working now after 50 years work for different companies in his own company Kaukotek Oy in Finland, as a senior advisor. He has been active in trenchless technology since 1982. He joined ISTT as an individual member in London 1987 and has been a member until the joining of Finnish Society for Trenchless Technology. He has experience as a contractor, designer, consultant and property owner. He was a founding member of Finnish Society for Trenchless Technology (1999) (FiSTT) and he has been a member of the National board from the beginning. In addition Jari has served the membership as secretary and treasurer and since 2011 as chairman until the year 2019. He has been active by consulting the water sector frequently whenever new guidance is to be written in demonstrating and guiding people how to manage with trenchless technology. He has served also as a keynote speaker and lecturer for many conferences in Finland and abroad. He was elected to the executive Sub Committee during the ISTT board meeting in Madrid 2014. He was elected as a vice chairman of ISTT in Beijing 2016 and chairman in Cape Town 2018.

Keh-Jian (Albert) Shou - CTSTT

Keh-Jian (Albert) Shou - Vice Chair - CTSTT

Keh-Jian (Albert) Shou received his Ph.D. degree of Civil Engineering from the University of Minnesota (U.S.A.) in 1993. He began his career as a geotechnical engineer in National Expressway Engineering Bureau of Taiwan, then join National Chung-Hsing University as a professor. His specialties include rock mechanics/engineering, trenchless technologies, and engineering geology. He now serves the Tunneling and Underground Space Technology (SCI international journal) as an editor. The joined CTSTT of Taiwan in 2007, became the board director in 2008, and was elected as the chairman in 2013. He is the driving force in the development and promoting the trenchless technologies in Taiwan area, and is working in cooperation with consultants and contractors for various challenging trenchless projects. He was elected to the Executive Sub Committee ISTT Board on the No-Dig Istanbul 2015.

Kim Staheli - NASTT

Kim Staheli - Vice Chair - NASTT

Kimberlie Staheli, Ph.D., PE, specializes in trenchless engineering. Ms. Staheli's expertise ranges from geotechnical evaluations to microtunneling, horizontal directional drilling, and pipe jacking. She has extensive experience with feasibility studies, preliminary designs, plans and specifications, constructability reviews, prequalification packages, and on-site specialty construction inspections. She has served as an expert witness on numerous projects involving trenchless technology. Kim Staheli has served as both the Vice Chair and Chair of NASTT and is currently Immediate Past Chair of NASTT. She has also been a member of the NASTT delegation at several ISTT Board meetings. She holds a Ph.D. from the Georgia Institute of Technology in Geotechnical Engineering.

Enrico Boi - NASTT Chairman

Enrico Boi - Past Chairman - NASTT

ISTT Chairman, Enrico Boi is a Civil Engineering graduate with a background in electronic and information technology. For the past 20 years, Mr. Boi has been involved in the trenchless technology business, with a focus on underground mapping and SUE (Subsurface Utility Engineering). After about 15th years with TST Engineering, Mr. Boi is now President at IDS Georadar North America, managing geosystem and slope monitoring applications. He is active in research and development of mapping technologies, which have contributed to their advancement. He serves and has served as a keynote speaker and lectures at international events.

Sam Efrat

Sam Efrat - SASTT

Sam Efrat is a BSc Building Graduate with 32 years of Trenchless experience. For the past 26 years he has been Managing Director of Trenchless Technologies PTY Ltd. completing over 100 innovative contracts, installing 1 million metres of pipe by Trenchless means and the recipient of several prestigious awards. In 1992 Sam was a co-founding member of SASTT and has remained a member of SASTT for 27 years, serving on the SASTT Board for 14 years. He is presently President of SASTT. Sam is heading SASTT’s a mission to utilize trenchless technology as a means of economic upliftment and create new employment for 200 000 job entrants and 200 new BEE companies in order to service the required replacement of aged sewer and water pipes in South Africa. This is a model we hope to perfect in South Africa and use to assist other developing counties.

Trevor Gosatti - ASTT

Trevor Gosatti - ASTT

Trevor Gosatti is a civil contractor who has been involved with various civil construction companies owned or controlled by the Gosatti family interests since 1983. He developed an interest in trenchless technologies in the mid 1990’s through the use of micro-tunnelling equipment, and this expanded to other trenchless technologies, when he invested in companies with pipe rehabilitation technologies. He has been involved as both a Director and Managing Director of an ASX listed company that was developing pipe relining technologies from 2004 until 2014. Trevor has been the Western Australian Councillor for the Australasian Society of Trenchless Technology since 2005, and is a past Chairman for the Australasian Society of Trenchless Technology having held that role from 2009 to 2015.

Mark Andre Haebler - AATT


Mark André Haebler - AATT

Mark André Haebler is the Vice-Chairman of the AATT and a member since 2015. Furthermore, he´s an active member of an Austrian education and training program called: “ÖWAV-certified consultant for sewer rehabilitation. “ He has been involved in trenchless since 2003´s holding management positions with several trenchless suppliers. He is currently responsible for International Sales and Development with Uhrig Kanaltechnik GmbH, Germany, and is a member of the ÖWAV – rules and standards working group and a speaker as a certified consultant for sewer rehabilitation (since 2013).

Jens Hoelterhoff - GSTT


Jens Hoelterhoff - GSTT

Professor Jens Hoelterhoff is Chairman of the GSTT and has twenty more than thirty years experience in underground pipe construction and trenchless applications. Hoelterhoff received his degree as a mining engineer from Technical University, Berlin in 1984. Between 1984 to 2002, he held management positions in pipeline construction, microtunneling and horizontal drilling. In 2002 Jens Holterhoff joined the University of Hochschule Wismar staff as a professor of Construction Management and Construction Technologies. He also operates a private consulting and engineering business with a focus on pipeline construction and trenchless technologies.

John Matthews

John Matthews - NASTT

John Matthews has over 16 years of experience in the installation, rehabilitation, and inspection of pipeline infrastructure systems. He is the Director of the Trenchless Technology Center (TTC) and an Associate Professor of Construction Engineering Technology at Louisiana Tech University. He has also served as the Pipe Renewal Manager at Pure Technologies and as Water Infrastructure Lead at Battelle. His work has been presented at more than 150 conferences nationally and internationally where he has received two ISTT No-Dig Awards (2005, 2012) and a NASTT Outstanding Paper Award (2015). He has authored more than 220 publications in the field of trenchless technology. Dr. Matthews has been a member of NASTT since 2003 and currently serves on the NASTT Board of Directors. He also serves on the Editorial Board for Trenchless Technology magazine. Dr. Matthews was elected to the ISTT Board of Directors in November 2020.

Carlos Munera

Carlos A Munera - CISTT

Carlos A. Munera has been a member of the CISTT (Colombian Institute for Trenchless Technologies) Board of Directors since 2013 and the Co-Chair for the NASSCO International Relations Committee (National Association of Sewer Service Companies in the United States and Canada) since 2012. He received an MBA from Loyola University, Chicago, USA and his Masters in Infrastructure Business in EOI, Madrid, Spain. He is the International Operations Manager for Pacific Group S.A. (Colombia) and the Central and South American Regional Sales Manager for Envirosight LLC (USA). Mr. Munera has more than 13 Years of experience introducing trenchless technologies for maintenance, inspection and rehabilitation in the Central and South American region, more than 10 years of experience in water and waste water industry technology/strategy consulting, and more than 10 years of experience in the direction of projects for pipeline condition assessment in the water and waste water industry. He has collaborated in the creation/adaptation and implementation of several standards among the water and waste water industry. Mr. Munera was elected to the ISTT Board of Directors in November 2020.

Ian Ramsey

Ian Ramsey - UKSTT

Ian Ramsay graduated from the University of Newcastle UK and has been involved in trenchless technology since 1996. He has mainly worked in sewer rehabilitation involving cured-in-place technology, from small to large diameter pipes. Mainly on the supply side but also as a project manager. He has worked around the world specifically in Asia, USA and Europe and has presented several master classes on condition assessment and CIPP best practices throughout the world as well as writing several international technical papers. Mr. Ramsay is currently vice chair of the UKSTT and was a past chair from 2012-2014. He is also an independent consultant for trenchless technology. Mr. Ramsay was elected to the ISTT Board of Directors in November 2020.

Peter Smeallie -  Executive Director

Peter Smeallie - Executive Director

Peter Smeallie assumed the executive directorship of ISTT in April 2017, succeeding John Hemphill who will continue in a consulting position during a transition phase. Mr.Smeallie is president of Research Opportunities Management, a consulting firm offering strategic advice on developing research and development programs for universities, professional firms and other organizations. Prior to this, he worked at the National Academy of Sciences where his responsibilities included directing advisory research studies in areas such as geotechnology, rock mechanics, tunneling methods and safety, energy engineering, infrastructure, and urban systems. Mr. Smeallie's last position at the Academy was Director of the Geotechnical Board including the U.S. National Committee on Tunneling Technology. Mr. Smeallie has a degree in Urban Studies from St. Lawrence University. He resides in Alexandria, Virginia, U.S.A.