10 Inotiv lab directors
Director, Laboratory Operations, Senior Director, Regulated Bioanalysis and Histology Director Inotiv-Boulder are among the titles these Inotiv lab directors hold today. A reader can learn how lab directors run their labs at Inotiv from people who have held the role.
Professionals to explore
Arlene León
LinkedInExperience: Director, Laboratory Operations · Inotiv
Arlene León has been Director, Laboratory Operations at Inotiv since March 2024, based in Rockville, Maryland. They were Director of Operations and Scientific Affairs at VRL Laboratories (2020–2023), a Director at VRL Laboratories (2014–2020) and a Director at BioReliance (2004–2014), and their profile describes management of operations and leading teams in the development of new technologies.
Carol D. Swartz
LinkedInExperience: Former Director, In Vitro Toxicology · Inotiv
Carol D. Swartz is a former Inotiv lab director who was Director, In Vitro Toxicology at Inotiv from January 2022 to September 2025, with oversight of GLP and non-GLP compliant in vitro genetic toxicology studies for commercial and government clients. They were In Vitro Toxicology Program Manager at Integrated Laboratory Systems, LLC (ILS) (2007–2022).
Cheryl A. Hobbs
LinkedInExperience: Former Director, Genetic Toxicology · Inotiv
Cheryl A. Hobbs is a former Inotiv lab director who was Director, Genetic Toxicology at Inotiv from January 2022 to October 2025, in Research Triangle Park, North Carolina. They were also Director of Toxicology at Integrated Laboratory Systems, LLC (ILS) (2015–2025), and have been a Consultant at GeneTox 101, LLC since October 2025.
Jeanne M. Rumsey
LinkedInExperience: Director – Laboratory Sciences / Biotransformation Lead · Inotiv
Jeanne M. Rumsey has been Director – Laboratory Sciences / Biotransformation Lead at Inotiv since March 2025, in St. Louis, and was Senior Principal Investigator for Drug Metabolism / Biotransformation Lead at Inotiv (2019–2025). They were also Mass Spec Lab and Project Manager, WU-NIH Proteome Characterization Center at Washington University School of Medicine in St. Louis (2011–2013).
John P Doherty
LinkedInExperience: Senior Director, Regulated Bioanalysis · Inotiv
John P Doherty has been Senior Director, Regulated Bioanalysis at Inotiv since September 2021, in West Lafayette, Indiana, where the role is described as head of method development and validation. They were Group Leader, LC-MS Bioanalysis at Pharmaron (2018–2021) and Bioanalytical Chemist, Drug Metabolism and Pharmacokinetics at Novartis (2006–2016).
Johnathan Furr
LinkedInExperience: Director Developmental and Reproductive Toxicology · Inotiv
Johnathan Furr has been Director Developmental and Reproductive Toxicology at Inotiv since October 2024, based in Gaithersburg, Maryland, and was Senior Toxicologist, Developmental and Reproductive Toxicology at Inotiv (2020–2024). They were Senior Scientist - Developmental and Reproductive Toxicology at Southern Research (2018–2020).
Keith Nelson
LinkedInExperience: Senior Director, Toxicologic Pathology · Inotiv
Keith Nelson has been Senior Director, Toxicologic Pathology at Inotiv since January 2025, based in Kalamazoo, Michigan, and was Director, Toxicologic Pathology at Inotiv (2022–2025). They were Senior Scientific Director, Pathology at Charles River Laboratories (2021–2022), and their profile lists toxicologic, vaccine and injectables pathology among their specialties.
Mark James Hoenerhoff
LinkedInExperience: Senior Director, Investigative and Molecular Pathology · Inotiv
Mark James Hoenerhoff has been Senior Director, Investigative and Molecular Pathology at Inotiv since October 2023, based in Ann Arbor, Michigan, and has also held the role of Senior Pathologist at Inotiv since January 2023. They were Clinical Professor at University of Michigan Medical School (2014–2023) and Senior Pathologist, pro re nata at Charles River Laboratories (2016–2023).
Rebecca Olson
LinkedInExperience: Histology Director Inotiv-Boulder · Inotiv
Rebecca Olson has been Histology Director Inotiv-Boulder at Inotiv since March 2021, based in Boulder, Colorado. They were Histology Manager (2018–2021) and Histology Tech (2010–2018) at HistoTox Labs “An Inotiv Company”, and Histology Technician Clinical Lab Tech at Idexx Laboratories (2004–2010).
Vanessa Johnson-Peltier
LinkedInExperience: Director, Lab Management · Inotiv
Vanessa Johnson-Peltier has been Director, Lab Management at Inotiv since May 2024, with a headline reading Director, Lab Management of Genetic Toxicology at Inotiv, based in the Washington DC-Baltimore Area. They were Senior Lab Manager at Inotiv (2022–2024) and Manager, Toxicology at BioReliance (2018–2022).
Choose the right perspective
Match the person's lab area, whether bioanalysis, histology, pathology or toxicology, to the decision you face. Weigh how recently someone ran a lab against the range of roles they held around it.
Questions to take into the conversation
- 01What does running your lab involve day to day, and which decisions sit with you rather than with site or quality leadership?
- 02What did you change first when you took over your lab, and why?
- 03What would you tell someone taking on their first lab director role?
Reaching Inotiv lab directors
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About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.