The faculty of the Tri-Institutional Training Program in Laboratory Animal Medicine and Science is composed of laboratory animal specialists, comparative pathologists, research scientists and regulatory specialists. Currently, eight of the faculty are board certified by the American College of Laboratory Animal Medicine and three are board certified by the American College of Veterinary Pathology or the European College of Veterinary Pathology.
Each postdoctoral fellow is assigned to a member of the program faculty who will serve as a mentor. Fellows meet with their mentors monthly to discuss their progress. Each clinical rotation is supervised by a faculty member or a senior management staff member to ensure that fellows meet the established goals for the rotation.
Sebastian Carrasco, DVM, MPVM, MSc, PhD
Dr. Carrasco is a Comparative Pathologist for the Laboratory of Comparative Pathology in the Center for Comparative Medicine and Pathology (CCMP). He holds a faculty appointment as an Assistant Professor of Pathology and Laboratory Medicine in the Department of Pathology and Laboratory Medicine at Weill Cornell Medicine. He received his DVM from the Universidad Mayor Chile and obtained his master’s degrees in preventive veterinary medicine and comparative pathology from the University of California Davis. He completed his Ph.D. in microbiology and immunology at the Indiana University School of Medicine. After finishing his graduate studies, he pursued his residency training in anatomic pathology with emphasis on laboratory animal pathology at the UC Davis School of Veterinary Medicine. Dr. Carrasco has been a diplomate of the American College of Veterinary Pathologists since 2019. Prior to joining CCMP, he was a comparative pathologist in the Division of Comparative Medicine at the Massachusetts Institute of Technology, where he provided comparative pathology services for a wide range of laboratory animal species, including aquatic and avian species, nonhuman primates (both common marmosets and rhesus macaques), and laboratory rodents and lagomorphs. His research has focused on understanding the role of Borrelia burgdorferi’s virulence factors and macrophage scavenger receptors in the pathogenesis of arthritis and carditis in the mouse model of Lyme disease. His collaborative research focuses on phenotyping and comparative pathology in diverse translational research areas, including infectious diseases, immunology, aging, microbiome, toxicopathology, cancinogenesis, drug discovery, and mouse models of SARS-CoV2.
Christopher Cheleuitte-Nieves, PhD, DVM
Dr. Cheleuitte is a Clinical Veterinarian in the Research Animal Resource Center, which serves both Memorial Sloan Kettering and Weill Cornell Medicine. He holds a faculty appointment as an Assistant Laboratory Member in the Sloan Kettering Institute’s Cancer Biology and Genetics Program. Dr. Cheleuitte obtained his B.S. in Biology from the University of Puerto Rico – Río Piedras and then worked for the university as Laboratory Manager for the Center for Applied Tropical Ecology and Conservation. He subsequently obtained his doctorate in Animal Behavior and Ecology from Texas A&M University, followed by his veterinary medical degree from Cornell University. Dr. Cheleuitte completed postdoctoral training in Comparative Medicine at the Tri-Institutional Postdoctoral Training Program in Laboratory Animal Medicine and Science (Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine, and The Rockefeller University) in ‘18 and he is a diplomate of the American College of Laboratory Animal Medicine. During his fellowship, he conducted comparative genomic research on the opportunistic pathogen Corynebacterium bovis and evaluated the potential use of lysins and bacteriocins as a novel treatment method for C. bovis skin infections in mice and methicillin-resistant Staphylococcus aureus (MRSA) in nonhuman primates. He is particularly interested in animal enrichment, infectious diseases, outreach, and teaching. He enjoys the challenges of working with a variety of species and assuming a diversity of responsibilities (i.e., clinical, research, training, and regulatory).
Leslie Lynn Diaz, DVM, MPH
Dr. Diaz is a Research Associate and the Associate Director of the Rockefeller University’s Comparative Bioscience Center. She is a graduate of Cornell University’s College of Veterinary Medicine and has a master’s degree in public health from the University of Minnesota. She completed her postgraduate training in laboratory animal medicine at the Tri-Institutional Training Program in Laboratory Animal Medicine and Science, a partnership between Memorial Sloan Kettering, Weill Cornell Medicine, and the Rockefeller University. She became a diplomate of the American College of Laboratory Animal Medicine in July 2015. Dr. Diaz has experience with a wide range of animal species, including rodents, aquatics, reptiles, primates, and farm animals. She enjoys teaching, and her special interests include anesthesiology, aquatics, and high-level biocontainment.
Catalina Echeverri, DVM
Dr. Echeverri is a Clinical Veterinarian and the Assistant Director of The Rockefeller University’s Comparative Bioscience Center. She received her veterinary degree from Ross University School of Veterinary Medicine spending her clinical (4th) year at University of Florida’s College of Veterinary Medicine. She completed postdoctoral training in Laboratory Animal Medicine at Columbia University. Dr. Echeverri has experience with a wide range of animal species, including rodents, aquatics, reptiles, primates and farm animals. She enjoys teaching and her interests include analgesia and pain management as well as anesthesiology.
Michelle Eckstein, BS, LVT, LATg, CMAR
Ms. Eckstein is the Senior Education and Quality Assurance Administrator for the Center of Comparative Medicine and Pathology’s (CCMP) Research Animal Resource Center, which serves Weill Cornell Medicine, the Hospital for Special Surgery and the Memorial Sloan Kettering Cancer Center. Ms. Eckstein obtained her B.S. in Animal and Poultry Sciences from Virginia Polytechnic Institute and State University. Prior to joining the Center of Comparative Medicine and Pathology, she worked with various small and large animal models at the National Institutes of Health (NIH) for 11 years. At the NIH, she provided research support to multiple labs studying viral pathogenesis and pre-clinical vaccine development for a variety of infectious agents including herpesviruses, hepatitis viruses and respiratory pathogens. She has experience in regulatory oversight, occupational health administration, and non-human primate facility management. Ms. Eckstein enjoys finding creative ways to solve problems and identify areas for improvement.
Christine Lieggi, DVM
Dr. Lieggi is the Associate Director and Head of Veterinary Services in the Research Animal Resource Center, which serves both Weill Cornell Medicine and Memorial Sloan Kettering Cancer Center. Dr. Lieggi received her veterinary degree from Michigan State University and completed a postdoctoral fellowship in laboratory animal medicine at the University of Illinois at Chicago. She has been a diplomate of the American College of Laboratory Animal Medicine since 2005. Dr. Lieggi has experience with a wide range of animal species utilized in the biomedical research setting, including rodents, fish, primates, canines, and farm animals. She enjoys teaching, and her special interests include the management of pain and distress in the research setting and biosecurity and standardization of the zebrafish research model.
Neil S. Lipman, VMD
Dr. Lipman is the Executive Director of the Center of Comparative Medicine and Pathology, which serves Memorial Sloan Kettering, Weill Cornell Medicine, and the Hospital for Special Surgery, and serves as Director of the Tri-Institutional Training Program in Laboratory Animal Medicine and Science. Dr. Lipman holds faculty appointments as professor of Veterinary Medicine in Pathology and Laboratory Medicine at Weill Cornell and as a laboratory member in the Cancer Biology ad Genetics Program of the Sloan Kettering Institute. He received his veterinary degree from the University of Pennsylvania and training in comparative medicine from the Massachusetts Institute of Technology. Dr. Lipman has been a diplomate of the American College of Laboratory Animal Medicine since 1988. Over the past 30 years, Dr. Lipman has also held various animal resource program service and academic appointments at the University of Chicago, the Massachusetts Institute of Technology, and Brown University. His research and subspecialty interests include animal facility design and management, endocrinological disorders and infectious diseases of laboratory animals, rodent caging systems, and the in vitro production of monoclonal antibodies.
Heather R. Martin, DVM
Dr. Martin is a Senior Clinical Veterinarian in the Research Animal Resource Center since 2014, with primary clinical responsibilities at Weill Cornell Medicine and the Hospital for Special Surgery. Prior to veterinary school, she worked in the focused ultrasound laboratory at Brigham & Women’s Hospital under Dr. Kullervo Hynynen for several years where she developed an interest in laboratory animal medicine. Pursuing that interest, she attended Kansas State University’s College of Veterinary Medicine, graduating in 2006. Dr. Martin completed postdoctoral training in Comparative Medicine at the Massachusetts Institute of Technology, and is a Diplomate of the American College of Laboratory Animal Medicine. Dr. Martin has a diverse background in laboratory animal medicine and science, with experience in both academia and industry. Her background and continued interests include cancer therapeutics, gastrointestinal bacterial diseases, toxicology, and preclinical research.
Ileana Miranda, DVM, MSc
Dr. Miranda is a Comparative Pathologist at the Laboratory of Comparative Pathology (LCP) and the Genetically Modified Animal Phenotyping Service of the Center of Comparative Medicine and Pathology, which serves Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine, the Hospital for Special Surgery, and The Rockefeller University. She holds a faculty appointment as a Research Associate at The Rockefeller University’s Comparative Bioscience Center and is a diplomate of the American College of Veterinary Pathologists. She received her Veterinary and Master of Science degrees from the Federal Rural University of Rio de Janeiro, Brazil, and later was a Research Scholar at the University of Minnesota. In these roles, she led projects involving lectin-histochemistry, confocal microscopy, and transmission electron microscopy to study the pathogenesis of hepatotoxic, dermatological, and chronic respiratory diseases. Subsequently, she was an Anatomic Pathology Resident at Cornell University’s College of Veterinary Medicine, which reinforced her enthusiasm for the field of cancer biology and translational research. Dr. Miranda then first joined the LCP as a Comparative and Genomic Pathology Fellow in 2020. Her current professional interests include cancer immunotherapy, neuropathology, toxicologic pathology, and validation of animal models of human disease.
Sébastien Monette, DMV, MVSc
Dr. Monette is a Comparative Pathologist and the Head of Anatomic Pathology for the Laboratory of Comparative Pathology and the Genetically Modified Animal Phenotyping Service. He holds faculty appointments as a Laboratory Member in Sloan Kettering Institute’s Cancer Biology and Genetics Program, and as an Assistant Professor of Comparative Pathology at Weill Cornell Medicine. He received his veterinary degree from the Université de Montréal and completed a residency program and master’s degree in veterinary anatomic pathology at the University of Saskatchewan. He has been a diplomate of the American College of Veterinary Pathologists since 2003. Prior to joining the Laboratory of Comparative Pathology in 2008 Dr. Monette worked as a pathologist at The Animal Medical Center in New York. His research interests have included the analysis of pathological phenotypes of new genetically engineered animal models, the radiologic-pathologic correlation of novel minimally invasive tumor ablation modalities, and the discovery and characterization of naturally occurring pathogens in research animals, with a focus on Mouse Kidney Parvovirus.
Melissa Nashat, DVM, PHD
Dr. Nashat earned a B.S. in Biological Sciences from Cornell University and a PhD in pathology from the Albert Einstein College of Medicine, where she studied the neuropathology of infectious diseases. She taught undergraduate biology in the City University of New York system for several years before earning her veterinary medical degree from the Cornell University College of Veterinary Medicine. She subsequently received postdoctoral training in Comparative Medicine at the Tri-Institutional Postdoctoral Training Program in Laboratory Animal Medicine and Science (Memorial Sloan Kettering, Weill Cornell Medicine, and The Rockefeller University) and she became a Diplomate of the American College of Laboratory Animal Medicine in 2018. Most recently, she served as the Attending Veterinarian and Facility Director at the New York State Institute for Basic Research in Developmental Disabilities. Dr. Nashat has interests in infectious diseases and the pathology of rodents and zebrafish. She enjoys teaching and training RARC staff and postdoctoral fellows about immunology, animal welfare, biosecurity and the 3Rs (reduction, refinement and replacement).
Andrew Nicholson, DVM, PhD
Dr. Nicholson is the Director of Animal Subjects Research at Memorial Sloan Kettering Cancer Center and the Director of Animal Welfare Assurance at Weill Cornell Medicine. He serves as the Chairman of the Institutional Animal Care and Use Committee at Weill Cornell (IACUC) and as the Vice-Chairman of the IACUC at Memorial Sloan Kettering. Dr. Nicholson holds faculty appointments as an associate research professor of comparative pathology at Weill Cornell and as an Associate Laboratory Member in the Immunology Program of the Sloan Kettering Institute. He received his veterinary degree from Michigan State University, training in veterinary pathology from the University of Florida, and his PhD degree from the Graduate School of Medical Sciences of Cornell University. For the past 20 years, Dr. Nicholson has studied cardiovascular disease and macrophage scavenger receptors using murine models of atherosclerosis with support from the National Institutes of Health.
Samantha M. Peneyra, DVM
Dr. Peneyra serves as a Clinical Veterinarian and the Assistant Director of The Rockefeller University’s Comparative Bioscience Center. She obtained her veterinary degree from Cornell University’s College of Veterinary Medicine in 2014. She completed postdoctoral training in laboratory animal medicine in the Tri-Institutional Training Program in Laboratory Animal Medicine and Science in 2017. Following completion of her fellowship, she served as Clinical Veterinarian at New York University’s School of Medicine/Langone Health until late 2019. Dr. Peneyra’s interests include animal welfare, anesthesia, and aquatic infectious disease and husbandry.
Rodolfo J. Ricart Arbona, MLAS, DVM
Dr. Ricart serves as a Senior Clinical Veterinarian in the Research Animal Resource Center, which serves both Weill Cornell Medicine and Memorial Sloan Kettering Cancer Center. He received his master’s degree in laboratory animal science from Hahnemann University School of Medicine. He obtained his veterinary degree at The Ohio State University. After graduating from veterinary school he completed a small animal medicine and surgery internship at Oradell Animal Hospital. Dr. Ricart completed a postdoctoral fellowship in laboratory animal medicine and science at the Tri-Institutional Training Program in 2009. He received board certification in laboratory animal medicine in 2010 while working at the New York State Psychiatric Institute. His interests include animal models in neuroscience, colony health management, and large animal anesthesia.
Amanda Carlson Ritter, DVM
Dr. Ritter is a Senior Clinical Veterinarian in the Research Animal Resource Center, which serves both Memorial Sloan Kettering and Weill Cornell Medicine. She holds a faculty appointment as an Assistant Laboratory Member in the Sloan Kettering Institute’s Cancer Biology and Genetics Program. Dr. Ritter obtained her veterinary degree from the Virginia Maryland College of Veterinary Medicine. She then completed a companion animal emergency medicine internship at The Regional Veterinary Referral Center. Dr. Ritter completed her postdoctoral training in comparative medicine at the Tri-Institutional Postdoctoral Training Program in Laboratory Animal Medicine and Science (Memorial Sloan Kettering Cancer Center, Weill Cornell Medicine, and The Rockefeller University) in 2022. She obtained diplomate status from the American College of Laboratory Animal Medicine in 2023. Her interests include animal welfare, infectious diseases of laboratory animals, biosecurity, and aquatic animal husbandry and medicine.
Ravi Tolwani, DVM, PhD
Dr. Tolwani is Associate Vice President and Director of the Comparative Bioscience Center at The Rockefeller University. Dr. Tolwani received his DVM degree from Auburn University, his PhD degree in molecular and cellular pathology from the University of Alabama at Birmingham, and his MS degree in management from Stanford University Graduate School of Business. He has been a diplomate of the American College of Laboratory Animal Medicine since 1995. Prior to arriving at Rockefeller, Dr. Tolwani was an associate professor and attending veterinarian at Stanford. His research has focused on understanding the molecular mechanisms of plasticity of the nervous system using mouse models of neurological disease.
Juliette Wipf, MVSc, DVM, Dr.med.vet., PhD, FVH
Dr. Wipf serves as the Manager of the Laboratory of Comparative Pathology. She completed her DVM degree and PhD in Cellular and Biomedical Sciences at the University of Bern, Switzerland. In 2016, she received her Certificate of Qualification in Bacteriology from the Swiss Association of Veterinary Laboratory Diagnosticians. In the same year, she was awarded a competitive fellowship by the Swiss National Science Foundation, which gave her the opportunity to investigate bacterial viruses in canine pathogens at The Rockefeller University. Prior to joining the LCP, she served as Deputy Director of the Veterinary Diagnostic Division of the Center for Laboratory Medicine, Switzerland, which specializes in bacteriology, gross pathology, food hygiene, parasitology, virology, and bee health. Her research background and main interests are bacteriology, antimicrobial resistance, epidemiology, and laboratory methodologies.
Felix R. Wolf, Dr.med.vet, FVH, PhD
Dr. Wolf is Deputy Director of the Center of Comparative Medicine and Pathology, which serves both Weill Cornell Medicine and Memorial Sloan Kettering. Dr. Wolf holds faculty appointments as an associate professor of veterinary medicine in microbiology and immunology at Weill Cornell, as a Laboratory Member in the Immunology Program at the Sloan Kettering Institute, and as an associate professor in comparative medicine at Yale University. He received both his veterinary degree as well as his PhD degree from the University of Zurich, Switzerland, and postdoctoral training at Yale. Dr. Wolf has been a diplomate of the American College of Laboratory Animal Medicine since 1998 and was a founding diplomate of the European College of Laboratory Animal Medicine. Dr. Wolf has 30 years of experience in laboratory animal medicine. His research and subspecialty interests include pathogenesis of rodent viruses, health monitoring, biocontainment, and biosecurity.
Learn more about the Tri-Institutional Training Program in Laboratory Animal Medicine & Science.
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Training Facilities
The Tri-Institutional Training Program provides trainees access to world-class biomedical research facilities. -
Training Description
Learn about the training program at the Tri-Institutional Training Program in Laboratory Animal Medicine & Science. It consists of two main training components: clinical, management, and administrative training and research training. -
Faculty
The faculty of the Tri-Institutional Training Program is composed of laboratory animal specialists, comparative pathologists, regulatory specialists, and veterinary scientists. -
Program Duration & Completion
The duration of the Tri-Institutional Training Program is three years. -
Postdoctoral Fellows
Current and prior trainees. -
Admission Requirements & Process
Learn more about applying to the Tri-Institutional Training Program. -
Contact Us: Tri-Institutional Training Program
Contact the Tri-Institutional Training Program in Laboratory Animal Medicine & Science at MSK.