PAUL ADAMUS, Oregon State University
Dr. Adamus is on the research faculty at Oregon State University and supervises ecological and geomorphic studies of wetlands and other ecosystems. He authored one of the first function assessment methods (WET) intended for national use and Oregon’s HGM methods, trained professionals in their use, and designed/directed regional assessments of wetlands in CA, AK, OR, WA, CO, and ME. Dr. Adamus has authored numerous publications.

SARAH SPEAR COOKE, PWS, Cooke Scientific
Dr. Cooke has over 20 years experience in the wetlands/riparian restoration field in the Pacific Northwest. A professional botanist, she focuses on wetland and upland habitat restoration and is the principal author and editor of A Field Guide to the Common Wetland Plants of Western Washington and Northwestern Oregon.

SAM COLLINSON, Environmental Consultant
Mr. Collinson has over 30 years experience with wetland regulation, 26 of those in the Corps of Engineers Headquarters Regulatory Branch. For 20 years he had primary responsibility for development of the current Corps regulations, policy guidance, and the nationwide permit program. Since retiring in 2002, he has worked as a consultant on regulatory and wetlands issues.

DAVID DEARING, Attorney at Law
Having participated in some of the most significant legal actions to have shaped federal wetland policy, Mr. Dearing served nine years as a lead trial attorney for the U.S. Department of Justice representing the Corps of Engineers, Environmental Protection Agency, and Coast Guard. He is currently in private practice(DearingLawFirm.com).

KEVIN HALSEY, Parametrix, Inc.
Mr. Halsey’s team developed a rapid assessment tool for estimating all major services of ecosystems at the site level. It is applicable to a wide range of ecosystems and can be used to estimate credits for ecosystem services in voluntary or regulatory markets.  An attorney, he also teaches a course on identifying and managing environmental risk in business transactions at Lewis and Clark Northwestern School of Law.

ROBERT H. MOHLENBROCK, Ph.D., Biotic Consultants, Inc.
A nationally acclaimed expert in plant identification, Dr. Mohlenbrock has taught plant identification courses annually since 1960, authored 58 books (including identification guides) and 500 other publications, and is a monthly columnist for Natural History magazine’s "This Land."

WILLIAM BLAKE PARKER, Hydrosoils, Inc.
The foremost U.S. authority on the identification of hydric soils, Mr. Parker led the project that developed the definition of hydric soils and the original list of hydric soils of the U.S. He also formulated much of the soils portion of the 1987 Corps of Engineers Wetland Delineation Manual and served for many years on the National Technical Committee for Hydric Soils.

GARY PIERCE, Ph.D., Froghome Environmental, LLC
Dr. Pierce is recognized nationally for his expertise in wetland mitigation, particularly in the successful construction and restoration of freshwater marsh and forested wetlands. Since 1985 he has been the primary instructor in the Army Corps of Engineers’ course, "Wetland Construction and Restoration," as well as courses for Wetland Training Institute and other providers.

ROBERT J. PIERCE, Ph.D., PWS; Wetland Science Applications, Inc.
Dr. Pierce has more than 35 years experience in wetland regulation, delineation, construction/restoration, and functional assessment, including participation in the development of the 1987 Corps of Engineers Wetland Delineation Manual, training courses, and the Nationwide Permit program. He has frequently testified as an expert witness.

PHIL SCOLES; Terra Science, Inc.
Mr. Scoles is a Registered Professional Soil Scientist and principal of Terra Science, Inc. specializing in wetland delineation, permitting, and mitigation. He has extensive experience working with hydric soils and wetland hydrology.

W. THOMAS STRAW, Ph.D., CPH, PWS, Hydrogeologist
A nationally recognized hydrogeologist with over 30 years experience specializing in wetland hydrology, Dr. Straw has consulted for both private industry and government agencies, including the Wetlands Research Team at the Army Engineer Waterways Experiment Station.

W. LARRY SWARD, HELIX Environmental Planning, Inc.
With over 25 years of exploring the natural history of southern California, Mr. Sward enjoys sharing his knowledge of botany, habitat restoration, and wetland delineation with his classes. He works as a biologist in the private sector and also teaches courses for WTI and Southwestern College, Chula Vista, CA.

JAMES W. TEAFORD, PWS, CWB, J.W. Teaford & Co.
Mr. Teaford is a forester and wildlife biologist with over 30 years experience in integrated natural resources management in both wetland and non-wetland habitats throughout the country. He has conducted professional wetland training for government agencies and the private sector throughout the United States.

SALLY TRNKA, HELIX Environmental Planning, Inc.
A practicing restoration biologist and botanist for over 14 years, Ms. Trnka has extensive experience in implementing and monitoring riparian and coastal salt marsh restoration in southern California. She is currently an environmental consultant in the private sector.

TORY R. WALKER, PE, CFM, Tory R. Walker Engineering Engineering, Inc.
With over 23 years experience in water resources planning and engineering, Mr. Walker is recognized for his expertise in hydrologic sciences, hydraulic analysis and design, sedimentation and erosion, fluvial geomorphic principles, and an understanding of the hydrology of riparan habitats. He has participated in the successful restoration or creation of functional riparian systems.

.Other instructors, or associates, who may be involved with WTI courses, include, but are not limited to, the following: