Our Team


Margie Bell

Executive Director of Biostatistics and Data Management

For nearly 30 years, Margie has been providing statistical support and data management for clinical trial data. She has worked on Phase 1, Phase 2, Phase 3 and post-marketing studies in both human and animal health. She was the primary statistician for several products recently approved by the CVM. Margie received her MS in Mathematics with an emphasis in Probability and Statistics from Northern Illinois University.

Margie joined ACI in April of 2019. Her primary responsibilities include the successful coordination and execution for all projects involving biostatistics and/or data management, including management of all aspects of EDC systems. Margie’s extensive experience and knowledge provides our clients with the security to know that their data and analyses will be produced accurately and in a timely manner.

When not busy analyzing data, Margie also enjoys hiking, running and golfing. Margie lives in Fort Collins, Colorado with her husband and black Labrador retriever, Ellie.

Eden Bermingham, DVM, MS, DACVCP

Executive Director of Pharmacology and Drug Development

Eden received her AB in Biology and French from Dartmouth College and DVM from the New York State College of Veterinary Medicine (Cornell).  She was a mixed/large animal practitioner with a focus on equine medicine in VT and NH before initiating a combined Master’s degree and veterinary clinical pharmacology residency at North Carolina State University College of Veterinary Medicine. During her residency, she practiced small animal medicine and she was accepted into the American College of Veterinary Clinical Pharmacology in 2004.

Eden then worked for Intervet as a clinical development veterinarian for nine years; her last position was Manager of the Clinical Development Team.  After Intervet was acquired by Schering-Plough Animal Health, she joined FDA’s Center for Veterinary Medicine where she was a Veterinary Medical Officer in the Division of Therapeutic Drugs for Non-food Animals for 5 years and Team Leader of the Clinical Pharmacology Team in the Division of Scientific Support for 5 years.

Eden’s role at ACI is to assist with the understanding of regulatory requirements and to design and assist with the implementation of proof of concept, dose determination and confirmation, pharmacokinetic, and pivotal safety and effectiveness studies.

Eden is a third-generation horseman, growing up on a horse farm in Vermont driving draft horses and Standardbred racehorses. She also competed two home-bred horses in three day eventing. She has a Clydesdale/Thoroughbred cross mare, five cats, a large garden, and an understanding husband. She lives in an airport community near Lewes, Delaware.

Philippe Brianceau, DVM

Chief Development Officer

After receiving his veterinary degree from the veterinary school of Toulouse in France, Philippe completed an internship in Large Animal Medicine at Cornell University and his residency in Large Animal Surgery at Tufts University before joining the pharmaceutical industry in 2001.

Philippe has nearly 25 years of experience in Animal Health, and a solid understanding of the drug development process, as well as the functions and processes relevant to drug development, regulatory affairs and project management.  He held several leadership positions of increasing responsibility, from early drug discovery to the approval of new animal drugs, in large pharmaceutical organizations, small startup companies, and contract research organizations.  Prior to joining ACI in 2017, he contributed to the management of a research farm, managed large field effectiveness and safety studies, lead a clinical research team and directed complex global project teams for the development and licensing of pharmaceutical animal products in the United States, Europe and Brazil.

Christine Costello

Data Manager

Christine received her Bachelor’s degree in Biological Sciences from Virginia Tech. Prior to joining ACI, Christine was an animal technician in the intensive care unit at Sobran. Christine served as an oncology technician and ACI site coordinator with The Oncology Service in the DC area and joined ACI in 2011 as a Data Manager. Christine is involved in many aspects of data management, including developing and maintaining databases for clinical studies, maintaining quality controls in ACI’s data capture processes, and managing and creating studies in EDC systems. She works remotely from Chesapeake, Virginia where she lives with her husband, their orange tabby, Cheddar, and their black labrador, Rocky.

Dina DiVirgilio

Senior Quality and Compliance Manager

Dina received her BS in Small Animal Science from Delaware Valley College in Doylestown, PA.  She started out in the pharmaceutical industry, first conducting biopharmaceutical/pharmacokinetic animal model studies, and then monitoring animal health clinical trials. Dina joined ACI in 2012. She is primarily responsible for the quality of the studies being conducted and ensures that ACI and its professional network are compliant with all applicable SOPs, protocols, and industry regulations.  Ranging from early phase to pivotal studies, Dina has had the ideal experiences needed to ensure high quality conduct across a multitude of study settings.

Dina lives in New Jersey with her husband, dog, and three cats. In her free time, she enjoys hiking with her dog, watching tennis, spending time with her nieces and nephew, and volunteering at her local animal rescue.

Marissa Farbo, CVT

Study Monitor

While attending the University of Hartford, Marissa explored multiple areas of human medicine and received a Bachelor’s degree in Health Science. Upon graduation, she elected to pursue her lifelong interest in veterinary medicine at Becker College and received her Associate’s Degree in Veterinary Technology.

Leaving New England for warmer weather, Marissa worked at the Veterinary Specialty Hospital of the Carolina’s as an oncology technician for two years. Upon returning to her home state of Massachusetts in 2007, Marissa worked as a certified oncology technician and ACI site coordinator at the New England Veterinary Oncology Group.

Marissa joined ACI in 2016 as a consultant and is now one of ACI’s trial monitors.  She is responsible for monitoring ongoing clinical trials for data accuracy and integrity in accordance with industry regulations. Marissa’s exposure to ever changing work environments has allowed her to adapt, prioritize and effectively manage multiple projects. In addition, her time spent as a study coordinator allows her to understand the process and challenges of on-site data collection.

Marissa lives in Central Massachusetts with her husband and two cats, Cisco and Salem. Outside of working, you can find Marissa spending time with family, outside enjoying the seasons, practicing yoga and traveling.

Stacy Hall


As the daughter of small business owners, Stacy grew up in a bagel and Italian bread bakery. Stacy graduated from the University of Delaware with a BS in Finance and minors in Economics and Biology. Stacy has continued to support the growth of small businesses throughout her career and has chosen to work for employers that share many of the same values she learned from a young age. Stacy relocated to the DC metro area in 2001. She has lived in Fairfax, VA since 2011.

Stacy has worked with ACI since 2002 and officially joined the ACI team in January of 2010. Stacy previously worked for 9 years as a public accountant and is very happy to be working in the private sector. She is responsible for the day-to-day financial business administration of ACI. She handles most financial aspects for the studies including budgeting, study estimates and payments to ACI sites.

Stacy loves most water sports and is happiest when she is spending time with her loving husband, two energetic sons and her very loyal dog, Abby.

JT Means

Project Manager

JT received his BS in Biology at Indiana University before moving to Washington, DC to pursue a career in veterinary medicine as a technician. JT specialized in oncology and acted as the site coordinator for numerous clinical trials. He joined ACI as a project manager in 2015, and now works remotely from his hometown of Columbus, OH. His responsibilities and expertise include the setup, training and ongoing management of clinical trials. JT lives with his wonderful wife, two energetic sons and two extremely lazy pugs. His hobbies include losing hearing at metal concerts, getting lost on weekend jogs, supporting a failing professional hockey team and curating his ever-growing insect collection.

Tony Rusk, DVM

Chief Operating Officer

Tony received his BS in Biology at Ball State University in Indiana and DVM from the Purdue University School of Veterinary Medicine. He completed his internship in Small Animal Medicine and Surgery at Friendship Hospital for Animals in June 2000. Tony has practiced clinical veterinary oncology for more than 15 years. As part of his clinical work, Tony has served as investigator on oncology clinical trials including 2 pivotal trials.

Tony joined ACI in 2001 as Director of Clinical Trials and became VP of Clinical Affairs in 2005. Tony was selected as COO in 2016.  Tony has served as medical director for more than 40 pivotal and non-pivotal clinical trials and has been instrumental in the design and implementation of more than 80 trials. Tony’s experience in clinical practice and clinical research provides a valuable perspective on product development and the need to leverage scientific, clinical and regulatory endpoints while ensuring the safety of pets enrolled in trials.

Outside of work, Tony enjoys spending time with his 2 sons and lovely wife.  Tony has 1 dog and 2 cats.

Brittany Sprague, CVT

Study Monitor

Brittany is a Certified Veterinary Technician that has been working in different areas of veterinary medicine since 2012. While receiving her bachelor’s degree in animal science, she discovered her love for exotic animals while studying abroad in Australia. Brittany went on to receive her master’s degree in management from Mount Ida College in 2015. She gained years of experience in a small animal medicine, and continued exploring her passion working with different species. Brittany recently gained experience in veterinary emergency medicine, and has been working with capuchin monkeys for the last seven years.

Brittany happily joined ACI in March of 2020 as a study monitor. She is primarily responsible for monitoring studies remotely and providing on-site support throughout the course of different clinical trials. Her education and experience working in different aspects of veterinary medicine has prepared Brittany to adapt and manage projects associated with clinical trials.

Brittany lives in Boston, Massachusetts with her boyfriend, her dog Rosie, and her cat Rito. When she isn’t working, Brittany enjoys spending time with friends and family, being active with her dog and traveling as much as possible.

Michelle Willette, CVT

Study Monitor

Michelle is a certified veterinary technician with more than ten years of experience in the field of veterinary medicine. After receiving her bachelor’s degree in animal science from Mount Ida College in 2014, she spent almost three years working at a veterinary oncology hospital treating cancer patients with radiation and chemotherapy. Michelle joined the Clinical Trials Office at Cummings Veterinary Medical Center at Tufts University in May of 2017, where she was the lead technician on several oncology clinical trials until October 2019.

Michelle joined ACI in March of 2019 as a consultant and is now one of ACI’s study monitors. She is primarily responsible for monitoring studies remotely and providing on-site support throughout the course of different clinical trials. With her experience working as a technician in the clinical trial setting, it allows her to understand the process for both data capture and data management within a study.

Michelle lives in Boston, Massachusetts with her boyfriend and their two rescue dogs, Forrest and Nellie. Outside of work, Michelle enjoys traveling, spending time with friends, going to the gym and training for the annual Pan-Mass Challenge.

Kristen V. Khanna, PhD, MBA

President and CEO

Kristen completed her PhD at the University of Minnesota and received post-doctoral training in the Department of Molecular Microbiology and Immunology at the School of Public Health at Johns Hopkins.  She completed an MBA at Johns Hopkins in 2005.

Prior to joining ACI, Kristen worked with several biotech companies in the areas of external relations, business development and strategic planning. She has actively served as ACI’s President and CEO since 2009.  Kristen loves the blend of scientific advancement and business strategy that is ACI’s work and she is continuously inspired by the human-animal bond.  Kristen’s family includes her husband, ACI founder Dr. Chand Khanna, their two children and a Danish-Swedish farm dog, Odin. She loves all things related to food, books and tennis and particularly enjoys her involvement in data management for her kids’ sports teams.


VISION EDC is the industry leader in complex studies for human and animal studies. VISION EDC’s software and services enable CROs and Sponsors to craft a database that fits their unique needs, manage mid-study updates with ease, build their own studies or leverage VISION EDC’s team of certified data managers to design and build their eCRFs. Features include: patient mobile app for direct data entry, cross form edit checks, randomization, direct lab uploads, site invoicing, automatic dictionary coding and more.

Ethos Veterinary Health is the result of the merger of four specialty hospital groups that have worked closely together over the past eight years: IVG Hospitals in New England, Premier Veterinary Group in Chicago, Wheat Ridge Animal Hospital in Denver and Veterinary Specialty Hospital of San Diego, in California. In April 2016, Ethos was pleased to welcome Peak Veterinary Referral Center to our network.  Ethos core values are: collaboration, continuous development, innovation, integration, quality
 and teamwork.  Its team consists of individuals coming together to create a culture that goes beyond the care of animals.

Medrio offers an integrated eClinical Software as a Service (SaaS) platform with a fully hosted Electronic Data Capture (EDC) system that drastically reduces study timelines and costs by putting study managers in control of their studies. By enabling studies to be built completely online without the need for any custom development, Medrio eClinical software allows studies to be ready in days instead of weeks. Medrio has been used successfully in Phase I-IV trials, registries, and other clinical studies by a number of leading contract research organizations (CROs), as well as biopharmaceutical and device companies. Founded in 2005, Medrio is headquartered in the San Francisco Bay Area.