Meet Our Team

Passion for high quality results is the driving force at Ethos Diagnostic Science, now part of Zoetis. Our dedicated technical team has decades of combined experience in veterinary and laboratory medicine and receive concentrated, on-going one-on-one training from our board-certified pathologists. This pathologist-driven training allows for laboratory-wide, comprehensive review of your laboratory results for the best possible patient outcome.

At the heart of our long success is our dedication to our clients. We strive to build personal relationships and take pride in being accessible for follow up questions. We understand that the results your team receives directly impacts the care you provide to your patients.

  • Steve Hill

    Chief of Consulting Services and Internal Medicine Consultant View Bio
  • Jennifer L. Owen

    DVM, PhD, DACVP (Clinical Pathology)
    Associate Clinical Pathologist View Bio
  • Jay Mackey

    CLS, MT (ASCP)
    Clinical Laboratory Quality Manager View Bio
  • Sam Jennings

    DVM, MSpVM, DACVP (Anatomic Pathology)
    Diagnostic Pathologist View Bio
  • Laura Brandt

    DVM, MS, DACVP (Clinical Pathology)
    Regional Clinical Laboratory Director – Denver & Clinical Pathologist View Bio
  • Kimberly Chapin

    Client Relations Specialist; Learning & Development Leader View Bio
  • Heather Coffill

    Client Relations Supervisor View Bio
  • EJ Ehrhart

    DVM, PhD, DACVP (Anatomic Pathology)
    Ethos Discovery and Diagnostic Pathologist View Bio
  • Carolyn Grimes

    DVM, DACVP (Clinical Pathology)
    Regional Clinical Laboratory Director – San Diego View Bio
  • Heather A. Kridel

    DVM, DACVP (Clinical Pathology)
    Regional Clinical Laboratory Director - Boston View Bio
  • Greg Moreau

    Clinical Laboratory Supervisor View Bio

Jay Mackey CLS, MT (ASCP)

Clinical Laboratory Quality Manager, San Diego

James (Jay) Mackey is a licensed Clinical Laboratory Scientist (CLS) in the state of California and the Laboratory Quality Manager at Ethos Diagnostic Science San Diego Laboratory. Jay graduated from Illinois State University in 1998 with a B.S. in Medical Technology. Jay began his career as a generalist clinical laboratory scientist before moving on to specialize in human infectious disease testing at Barnes-Jewish Hospital in St. Louis, MO. In 2009, Jay moved to Las Vegas, NV where he managed the clinical microbiology department for Quest Diagnostics. In 2011, Jay began working as the clinical microbiology manager for LabCorp of San Diego. There he managed directly and indirectly a staff of 75 with an annual monthly test volume of over 300,000 tests per month. Aside from managing the routine microbiology department for LabCorp, he also managed the molecular microbiology, special hematology, special chemistry, and serology departments. Jay also served as one of 5 Co-Discipline Directors for LabCorp Corporate Science and Technology for routine and molecular microbiology. In his role as Discipline Director, he and his colleagues were responsible for the scientific oversight for all clinical microbiology testing for LabCorp.

Most recently, Jay has held management positions for San Diego laboratories specializing in human molecular diagnostic testing. He has extensive knowledge of human disease genotyping, whole human genome, and whole human exome sequencing.

In his spare time, Jay loves to ride his mountain bike and spend time with his wife and three boys. He also enjoys photography and has recently started playing the guitar and ukulele. Jay is committed to patient centric laboratory medicine and is excited to bring over 20 years of clinical laboratory experience to Ethos Diagnostic Science San Diego.

Sam Jennings DVM, MSpVM, DACVP (Anatomic Pathology)

Diagnostic Pathologist, San Diego

Dr. Jennings earned his Doctor of Veterinary Medicine from the Cummings School of Veterinary Medicine at Tufts University in 2008. After graduation, he completed a residency in anatomic pathology and a Masters of Specialized Veterinary Medicine at the College of Veterinary Medicine at North Carolina State University (NCSU). He became a Diplomate of the American College of Veterinary Pathology in 2011 and continued to hone his diagnostic and teaching skill as a postdoctoral teaching scholar at NCSU until the end of 2012. Dr. Jennings returned to the Cummings School as faculty in 2013, where he taught students in the pre-clinical and clinical curriculum, served as residency coordinator, collaborated on a variety of clinical projects, and developed a particular interest in hepatobiliary pathology. He joined the Ethos Diagnostic Science Team in the fall of 2018 and is excited to work with engaged clinicians on challenging cases. In his spare time, Dr. Jennings can usually be found chasing his young son and daughter, enjoying time with his wife, or on the roads of San Diego county on his road bike.

Jennifer L. Owen DVM, PhD, DACVP (Clinical Pathology)

Associate Clinical Pathologist, San Diego

Dr. Owen attended the Pennsylvania State University for her undergraduate degree in Biology from 1991-1996. She received her PhD in Microbiology and Immunology from the University of Miami School of Medicine in 2003, followed by a two year post-doctoral fellowship in Tumor Immunology at Florida Atlantic University. Her research projects involved the immune response to mammary tumors in a mouse model of breast cancer. She attended the University of Florida College of Veterinary Medicine from 2005 to 2009, where she subsequently completed a 3-year Clinical Pathology residency. After becoming board certified with the American College of Veterinary Pathologists in 2012, she resumed her research career as an Assistant Professor at UF, studying the immune response involved in colitis and colon cancer with the Clinical Pathology service, winning several teaching awards during that time. She still maintains a courtesy faculty appointment at the University of Florida. Dr. Owen worked for ANTECH Diagnostics in Red Bank, New Jersey for several years before joining ETHOS. She’ll let you know what she does in her spare time, once she has spare time. She’s heard of such a thing, and it sounds delightful.


Chief of Consulting Services and Internal Medicine Consultant, Boston, Denver, Ethos Diagnostic Science Leadership, San Diego

Dr. Steve Hill is a 1991 alumnus of Colorado State University, College of Veterinary Medicine and Biomedical Sciences, where he graduated with honors. He completed his internship at the San Diego Veterinary Referral Hospital in 1992 and his internal medicine residency and master’s degree in clinical sciences at Colorado State University in 1995. Dr. Hill practiced at the Veterinary Specialty Hospital of San Diego from1995 to 2018.

After 23 years of Internal Medicine practice, Dr. Hill joins Ethos Diagnostic Science as our Chief of Consulting Services and Internal Medicine Consultant. Dr. Hill will be available to our clientele for consultations on clinical cases. In addition, he will provide clinical support for the Ethos Diagnostic Science pathology group, and will assist in driving the development of our service with the goal of promoting clinical excellence and best practices.

A Diplomate of the American College of Veterinary Internal Medicine, Dr. Hill has broad clinical interests in all aspects of veterinary internal medicine with special interest in gastrointestinal, hepatobiliary, pancreatic, immune-mediated, and infectious diseases. He has authored multiple scientific articles and textbook chapters, and he lectures at regional, national and international meetings. Dr. Hill is a past-president of the Comparative Gastroenterology Society. Additionally, he has participated in the development of student externs, interns, and residents through teaching and mentorship for many years.

Laura Brandt DVM, MS, DACVP (Clinical Pathology)

Regional Clinical Laboratory Director – Denver & Clinical Pathologist, Denver

Dr. Brandt completed veterinary school at the University of Tennessee College of Veterinary Medicine in 2006. She then made her way to the Chicago suburbs where she completed a private practice, small animal rotating internship, followed by a year of clinical practice as an emergency clinician. While she enjoyed the interesting cases and animal contact, the serenity of time spent at the microscope won out and Dr. Brandt completed a clinical pathology residency at Colorado State University in 2011. Simultaneously, she obtained a Master’s degree in microbiology. Upon completion of her residency, Dr. Brandt took a position with Gribbles Veterinary, a commercial diagnostic laboratory in New Zealand, for a few years. Most recently, Laura was employed as an instructor at Cornell University where she enjoyed a busy and diverse cytology and hematology case load. Outside of work, Dr. Brandt enjoys cooking dinner for friends, live music, hiking and traveling.

EJ Ehrhart DVM, PhD, DACVP (Anatomic Pathology)

Ethos Discovery and Diagnostic Pathologist, Boston, Denver, San Diego

Dr. EJ Ehrhart received his DVM degree from University of Missouri-Columbia. After four years in private practice, he completed his veterinary anatomic pathology residency and PhD at Colorado State University (CSU). His doctoral degree involved advanced pathology training focused on medical and radiation oncology. Dr. Ehrhart is board-certified in anatomic pathology by the ACVP. Upon completion of his PhD, Dr. Ehrhart worked as a diagnostic pathologist at the University of Illinois, later joining the faculty at Colorado State University. During his 15 years at CSU, Dr. Ehrhart became a full professor, worked as a senior veterinary diagnostic pathologist, was coordinator of the residency programs and oversaw the Molecular Pathology core at the prestigious Colorado State University Animal Cancer Center. EJ has a strong interest and expertise in oncologic and ocular pathology. He is a widely recognized oncologic pathologist with a focus on specialized molecular testing. His work has been extensively published and he has been an active contributor in many clinical trials. Dr. Ehrhart joined Ethos Diagnostic Science in 2017.

Carolyn Grimes DVM, DACVP (Clinical Pathology)

Regional Clinical Laboratory Director – San Diego, San Diego

Dr. Grimes earned her BS in biology from the University of Notre Dame in 2001, followed by a DVM in 2006, from Purdue University. Upon graduation, she completed a one-year rotating internship in small animal medicine and surgery at Angell Animal Medical Center in Boston, MA, after which she practiced for two years as a small animal emergency veterinarian at Red Bank Veterinary Hospital in New Jersey. Dr. Grimes then pursued residency training in clinical pathology at the University of Tennessee, completing her training in 2012. After completion of her residency, Dr. Grimes joined the faculty of at the University of Montreal, where she worked in the clinical laboratory, taught in the veterinary curriculum, and did research that focused mainly on hematopathology and optimization of hematology analyzers. In her spare time, Carolyn enjoys spending time with her husband and son. She also enjoys running and is an avid baseball fan.

Kimberly Chapin BS

Client Relations Specialist; Learning & Development Leader , Denver

Kim was born and raised San Diego, California. She graduated from California State University San Marcos in 2012 with a BS in Business Management. Kim loves being a voice of Ethos Diagnostic Science and is passionate about the fact that her career aids in the care and wellness of animals. Kim joined the STAT Lab team in San Diego in 2012. In 2018, Kim relocated to the Ethos Diagnostic Science lab in Denver. When Kim is not at the lab she is often hanging out with her French Bulldog, Nora, riding horses, engaging in fitness activities, or beer tasting at breweries with friends.

Heather Coffill

Client Relations Supervisor, Boston

Heather Coffill, a life-long New England resident, brings years of both veterinary and management experience to Ethos Diagnostic Science. Heather was an office manager for five years before entering the veterinary field. For ten years she worked in a general practice veterinary facility, where she ran all in-hospital laboratory samples, maintained the point-of-care laboratory analyzers, and even developed the laboratory standard operating procedures. In this role, she also supervised the veterinary assistant staff, trained new staff members, and managed scheduling and inventory.

In July of 2014 Heather joined the team at Massachusetts Veterinary Referral Hospital as a client care representative. After two years with the client care team, she made the transition to the Ethos Diagnostic Science lab, blending her veterinary and management backgrounds in her new role. Heather was the Boston team’s first laboratory assistant and was essential to the opening of the Ethos Diagnostic Science reference lab in November of 2016. Since then, Heather has trained each new laboratory assistant and has continued to grow in her leadership role making the transition to her current position as supervisor of customer service and laboratory assistants in the fall of 2017. In her customer service role, Heather is excited to support Ethos Diagnostic Science clients and work with new clients interested in utilizing our laboratory services.

Greg Moreau CVT

Clinical Laboratory Supervisor, Boston

A lifetime resident of Massachusetts, Greg graduated from North Shore Community College with an AS in Applied Sciences in Veterinary Technology. After obtaining his CVT, Greg joined Ethos Veterinary Health in 2009 as a veterinary technician in the emergency department at Bulger Veterinary Hospital. During his 5+ years at Bulger, Greg developed a keen interest in laboratory medicine and managed the point-of-care laboratory equipment.

Greg joined the hospital laboratory team at Massachusetts Veterinary Referral Hospital in early 2015 and was an integral team member in making the transition from a point-of-care laboratory into the full-scale reference lab that is Ethos Diagnostic Science Boston. As the Clinical Laboratory Supervisor, Greg is devoted to oversight of the quality assurance and quality control program, as well as analyzer maintenance and technician training.

When he is not hard at work in the lab, Greg enjoys spending time with his wife, Jamie, finding their next outdoor adventure.

Heather A. Kridel DVM, DACVP (Clinical Pathology)

Regional Clinical Laboratory Director - Boston, Boston

Dr. Kridel graduated with honors from the University of Florida with a BS in Animal Sciences. She then continued her education at the University of Florida receiving her Doctorate in Veterinary Medicine in 2005. Following veterinary school, Dr. Kridel completed a one-year rotating small animal medicine and surgery internship at VCA South Shore Animal Hospital in South Weymouth, MA. Dr. Kridel practiced small animal emergency medicine in the Boston area for four years prior to returning to the University of Florida to complete a three-year clinical pathology residency program from 2010 to 2013. In 2014 Dr. Kridel was accepted as a Diplomate into the American College of Veterinary Pathologists.

Dr. Kridel joined the IVG network of hospitals (now Ethos Veterinary Health) in the fall of 2013 and founded the cytopathology service for our regional hospitals, as well as established a fully staffed point-of-care diagnostic laboratory within Massachusetts Veterinary Referral Hospital. Dr. Kridel was instrumental in the planning and transition of the Mass Vet lab into the full-scale reference laboratory that is Ethos Diagnostic Science Boston, which launched internally to support Ethos hospitals, on November 1, 2016.

When Dr. Kridel is not at work, she enjoys spending time with her husband and pets, reading, kayaking, and traveling.