The Western Chapter (WESTT)
of the North American Society for Trenchless Technology (NASTT

Who We Are

NASTT is the North American Society for Trenchless Technology, an engineering society of individuals, public organizations and private companies dedicated to the promotion and use of trenchless construction practices and technologies. NASTT was founded and incorporated as a non-profit organization in June 1990.

NASTT is affiliated with the International Society for Trenchless Technology (ISTT) and shares the same basic mission; to advance the practice of trenchless technologies for public benefit and to promote education, training, study and research. NASTT members are automatically affiliated with ISTT through their NASTT membership.

There are 11 Regional Chapters throughout the US and Canada. The Regional Chapters offer members the opportunity to network with industry colleagues as well as attend educational events and share solutions for the betterment of our society.

The Western Chapter of NASTT (WESTT) promotes the NASTT mission within our western region of Arizona, California, Hawaii, Nevada, and New Mexico.

Our Mission…

Is to advance the science and practice of Trenchless Technology for public benefit; to promote and conduct education, training, study and research in said science and practice for the public benefit; and to make available information thereof to all interested and concerned parties.

Click this link to take a look at the news and announcements from NASTT.

Officers and Board Members

  • Lisa Arroyo, Chair
  • Kate Wallin, Vice Chair
  • Tim Taylor, Treasurer
  • Rachel Martin, Secretary
  • Brian Avon, Past Chair
  • Michelle Beason
  • Jennifer Glynn
  • Jacquie Jaques
  • Sasha Mestetsky
  • Mike Rocco
  • Greg Watanabe

Contact us today!


Check back soon for more on WESTT Chapter events!

When you join the North American Society for Trenchless Technology (NASTT), you’ll belong to the largest community of trenchless professionals in the USA and Canada committed to promoting better and more responsible ways to manage underground infrastructure and advance trenchless technology for the benefit of the public and the natural environment. 

Join as a college student or individual professional or get group savings as an organization with a corporate or government/education/utility membership. Chapter membership is included with NASTT membership.