John Greer was raised in Austin, Texas, USA, and began working in archeology in 1959. Several years before that, he assisted graduate students and professional archeologists with survey and excavation. He received his BA (1965) and MA (1968) in Anthropology from the University of Texas–Austin and PhD (1995) from the University of Missouri–Columbia, with dissertation on the rock art of the Orinoco River in southern Venezuela.

Prior to 1977 John worked for several institutions, mostly on a project-specific basis, including the Museum of New Mexico, University of Texas-Austin (Department of Anthropology; Latin American Research Institute), Texas Archeological Salvage Project, Texas Archeological Research Laboratory, Texas Building Commission, Witte Museum, Texas Natural Areas Surveys, University of Missouri-Columbia (Department of Anthropology), Missouri Department of Transportation, private consulting firms, and museums in Germany.

Mavis Loscheider Greer was raised in Montana and graduated from Ronan High School. She received her B.A. (1974) and M.A. (1978) in Anthropology from the University of Montana in Missoula and PhD (1995) from the University of Missouri–Columbia, with dissertation on the rock art of the Smith River drainage in central Montana.

Before 1977 Mavis worked at the University of Montana (Department of Anthropology), mostly doing survey, excavation, and analysis, and served as Forest Archeologist on the Lewis & Clark National Forest in Montana. During graduate school she worked at the University of Missouri (Department of Anthropology).

Since 1977 John and Mavis co-direct Greer Services, an archeological consulting company based in Casper, Wyoming. They have worked in the Midwest and across most of the western USA, with thousands of archeological contract reports on file with state and federal agencies. Most commercial work presently is in Wyoming and Montana.

Fieldwork and research have covered many aspects of prehistoric and historic archeology, from Paleoindian sites and artifacts through historic Indian, Spanish, Army, and Anglo occupation of the northern and southern Plains and Latin America. John and Mavis have especially studied land use and cultural chronology during all time periods and throughout those areas. Their combined research focus presently centers on rock art, with primary interest in the western USA (especially Montana, Wyoming, New Mexico and Texas), Venezuela, Mexico, and dark zone art in caverns throughout the New World. They both are especially interested in recording rock art with the use of digital cameras and photographic enhancement techniques, chronological studies of rock art, and rock art relative to cultural migrations. Since 1991 they have concentrated on finding and recording rock art sites in Montana and Wyoming as a preservation measure as well as in response to compliance requests. These sites have served as a database for rock art reports to federal and state agencies as well as articles for professional journals and regional magazines. John and Mavis additionally maintain a strong research interest in Paleolithic art in western Europe, particularly in dark zone caves, and continue to travel extensively in those areas for comparisons and new ideas.

Archeological and ethnographic experience includes fieldwork and research on prehistoric and historic sites in North America (most states from Missouri to California and Alberta to Texas), Canada (Alberta), Latin America (Peru, Venezuela, Guatemala, Belize, and Mexico), and Europe (Germany, Spain, Portugal). Rock art studies and related travels have taken them specifically to France, Spain, Italy, Germany, England, Scotland, Canada, China, Australia, India, South Africa, Venezuela, Cuba, Santo Domingo, Peru, Bolivia, Brazil, Belize, Guatemala, Honduras, and Mexico, including Baja California. Speleological exploration and study since 1961 (with archeological and ethnographic recording) includes horizontal and vertical cave systems in North America, Central America, and Europe. Archeological and speleological publications since 1963 have appeared in national, regional, and local professional journals, newsletters, and other outlets.

Mavis is past president of the American Rock Art Research Association (ARARA), and John is vice-president of ARARA and past vice-president of the Colorado Rock Art Association (CRAA). John and Mavis both are members of numerous rock art specialty organizations around the world, as well as regional and national archeological and speleological associations.

We previously operated as Archeological Services and John & Mavis Greer Archeological Consultants.We also can be reached as Greer Archeology (GreerArcheology.com).