Research Associates

at the Walker Research Group, Ltd.


Candace J. Arroyo de Walker

Educated in the U.S. and Mexico, Mrs. Arroyo de Walker is majority stockholder in WRG, Ltd. She has extensive research experience in the Hispanic cultures of Colorado and the greater U.S. Southwest. She has served as cultural consultant and official interpreter in a variety of capacities and is of both Hispanic and American Indian descent. She is an expert in the graphic, plastic, and textile arts of the indigenous cultures of the Southwest.

Vice President
Curriculum Vitae

Deward E. Walker, Jr., Ph.D.

Dr. Deward E. Walker, Jr. received his Ph.D. in anthropology from the University of Oregon in 1964 and has conducted research among Tribal and non-Tribal populations of the Columbia Basin, Western Plains, Northern Great Basin and Southwest. He is frequently retained by Tribal governments and agencies to conduct demographic, legal, housing, health, education, and economic research related to planning, program development, risk assessment, legal defense of treaty rights, and various Tribal environmental initiatives concerning water, fish, mining, nuclear waste, logging, and so forth.

Roderick Sprague, Ph.D.

Dr. Roderick Sprague is a senior historical archaeologist and ethnohistorian with extensive experience in environmental impact research and mitigation. He has held numerous professional positions and received numerous awards. He is experienced in both Canada and the United States, and especially in the Columbia Basin.

Sylvester (Bus) Lahren, Ph.D.

Dr. Sylvester Lahren is a professional consultant in applied anthropology. He received his doctorate from the University of Colorado in anthropology and has served in both academic and non-academic roles. He is especially skilled and experienced in all aspects of rural economic and social development. He has conducted applied projects with American Indians, Hispanic populations, and Anglo-American populations of the Plains and Northwest in both Canada and the U.S. He is also trained and experienced in various aspects of cultural resource management throughout Western North America.


James Hester, Ph.D.

Dr. James Hester is a Senior Consulting Archaeologist with 45 years of professional experience. He was the State Archaeologist for Colorado from 1974-76 and is a Professor Emeritus of Anthropology at the University of Colorado. He served as Chief Archaeologist for the President’s Advisory Council on Historic Preservation from 1978-79. He also served as consultant to the U.S. Army Corp. of Engineers from 1985-88 where he directed a nationwide program in "in situ" site preservation. From 1993-94 he served as a consultant to the Department of Antiquities for the Republic of Cyprus. He has more than 80 scientific professional publications and numerous cultural resource inventories.

WRG Support Staff


Pamela Graves, M.A.

Pamela has a masters degree in English from the University of Colorado, Boulder. She is a writer and data analyst for WRG Ltd. She has extensive experience in archival research and in the analysis and interpretation of field data gathered in WRG, Ltd. research projects. She assists in maintenance in data and filing systems, including photographic archives.

Web Design

Michael Bryan

Michael performs computer consultation and data management for Walker Research Group, Ltd. His duties include development and maintenance of the Walker Research Group, Ltd. website.

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