Ralph Tiner, M.S., M.P.A. has over 40 years of practical experience in wetland delineation and is a nationally recognized authority in the field. He recently retired from the U.S. Fish & Wildlife Service where he directed wetland mapping in the Northeast United States as part of the U.S. Fish & Wildlife Service's National Wetlands Inventory (NWI). He is a nationally recognized expert on wetland delineation and has been actively involved in improving wetland delineation techniques for decades. In addition, he was compiler and principal author of the Federal Interagency Wetland Delineation Manual, which was published in 1989 and is the standard for identifying and delineating wetlands in New Jersey.

Ralph has written extensively on the subject of wetlands and is the author of several field guides including: Field Guide to Non-tidal Wetland Identification, Maine Wetlands and Their Boundaries, A Field Guide to Coastal Wetland Plants of the Northeastern United States, and In Search of Swampland, as well as an update of the Wetland Indicators book entitled Wetland Indicators: A Guide to Wetland Formation, Identification, Delineation, Classification, and Mapping. His most recent books are: Tidal Wetlands Primer: An Introduction to Their Ecology, Natural History, Status, and Conservation and Remote Sensing of Wetlands: Applications and Advances (for which he is senior editor and authored several chapters).

In addition to writing about wetlands, he has been teaching wetland identification and delineation courses through the Rutgers Office of Continuing Professional Education Office since the mid-1980s.