Research Appointments
The American Museum of Natural History, Division of Paleontology (Invertebrates), Research Associate, 1978-present
Geological Survey of Israel, Visiting Scientist, 1978-present
Mohonk Preserve, Research Associate, 2007-present
Professional Affiliations
Geological Society of America
International Palaeontological Association
New York State Geological Association
Palaeontological Association
Paleontological Society
Society for Sedimentary Geology