Meet Our Team

Passion for high quality results is the driving force at Ethos Diagnostic Science. 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.


  • Laura Brandt

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

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

    Client Relations Supervisor View Bio
  • Barb Easton

    RVT, AS
    Laboratory Manager - San Diego View Bio
  • Dr. EJ Ehrhart

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

    DVM, DACVP (Clinical Pathology)
    Regional Clinical Laboratory Director – San Diego View Bio
  • Melissa Gwaltney

    Microbiology Supervisor View Bio
  • Chand Khanna

    Chief Science Officer View Bio
  • Heather A. Kridel

    DVM, DACVP (Clinical Pathology)
    Regional Clinical Laboratory Director - Boston View Bio
  • Mindy LaFarga

    RVT, BS
    National Laboratory Director View Bio
  • Kip Larsen

    Laboratory Supervisor View Bio
  • Greg Moreau

    Clinical Laboratory Supervisor View Bio
  • Kristy Polkinghorn

    RVT, AS
    Laboratory Supervisor View Bio
  • Keith Richter

    Chief Applied Sciences Officer View Bio
  • Jessica Rogers

    Operations Manager; Histopathology Manager View Bio

Kip Larsen CVT

Laboratory Supervisor, Denver

Kip graduated from Colorado Mountain, College Veterinary Technology program in 1993. She has worked all over the country, in many areas of the veterinary field, including general practice, surgery, neurology, dermatology and emergency medicine. She has been employed at Wheat Ridge Animal Hospital since November 2006. In 2012, she was took a position as coordinator of their in-house lab. In 2018, Kip was promoted to lab supervisor of Ethos Diagnostic Sciences-Denver.

In her spare time she enjoys gardening, crocheting, camping and just generally hanging out with her son.

Melissa Gwaltney MT(ASCP)

Microbiology Supervisor, San Diego

Melissa graduated from Indiana University with a BS in Medical Technology.  After certification by the American Society of Clinical Pathologists (ASCP), she moved to California, where she worked in clinical microbiology in a human hospital.  There, she coordinated the post-baccalaureate medical technologist training program in microbiology and worked in general clinical microbiology as well as the specialty areas of parasitology and non-fermenting bacteria.  She has also worked in the other departments of the lab, but microbiology is her favorite.

Melissa joined Stat Lab as a microbiology technologist in 2015 and enjoys being the microbiology supervisor, using Ethos’ state-of-the-art instrumentation.

When she’s not at the lab, Melissa loves spending time playing games with her family.


Chief Science Officer, Ethos Diagnostic Science Leadership

Dr. Chand Khanna is a graduate of the Western College of Veterinary Medicine. He then received specialty training in the fields of veterinary internal medicine and oncology first at the Ontario Veterinary College, University of Guelph and then the University of Minnesota. Dr. Khanna is a Diplomate of the American College of Veterinary Internal Medicine (Oncology). Following this clinical specialization Dr. Khanna received a PhD in Pathobiology from the University of Minnesota and then completed a post-doctoral fellowship with Dr. Lee Helman in the Pediatric Oncology Branch of the National Cancer Institute in Bethesda Maryland. He was recently awarded honorary membership as a Diplomate of the American College Veterinary Pathology.

Dr. Khanna continued his work at the National Cancer Institute as the Head of Pediatric Oncology Branch’s Tumor and Metastasis Biology Section, and Director of the Center for Cancer Research, Comparative Oncology Program. In 2011, Dr. Khanna was granted full tenure and promoted to the position of Senior Investigator at the National Cancer Institute. His research interests and responsibilities focused on the problem of cancer metastasis and the development of new options to treat patients with metastasis. In 2013, Dr. Khanna transitioned his work at National Cancer Institute to that of a Strategy and Research Consultant with the Center of Cancer Research. He has over 100 publications in the area of cancer biology and therapy.

Dr. Khanna has maintained a strong connection to the field of veterinary oncology and animal health. He continues to be an active clinician within his referral oncology practices, The Oncology Service, based in the greater Washington, D.C. area. He is also the founder of Animal Clinical Investigation a contract research company, involved in complex medical problems seen in pets.

Dr. Khanna is the immediate past-president of the American College of Veterinary Internal Medicine in Oncology, the chair of the Children’s Oncology Group Bone Biology Subcommittee, and the Director of the SARC (Sarcoma Alliance for Research through Collaboration) Developmental Therapeutics Committee. Dr. Khanna is a founding member of the Canine Comparative Oncology and Genomics Consortium. Dr. Khanna is a two-time recipient of the NCI Distinguished Mentor Award and was the 2010 recipient of the NCI award for outstanding Research.

As Chief Science Officer, Dr. Khanna’s primary roles will be to help embed the importance of science in our organization and develop scientific opportunities that can be commercialized, e.g. collaborating and developing relationships with investigators for the purpose of creating advanced diagnostics and platforms that can deliver personalized treatments for patients based on that pet’s specific genetics or other advanced testing results.

Keith Richter DVM, MSEL, DACVIM

Chief Applied Sciences Officer, Ethos Diagnostic Science Leadership

Dr. Keith Richter is a graduate of Cornell University, College of Veterinary Medicine. He completed an internship at the California Animal Hospital in Los Angeles and his Internal Medicine residency at the University of California, Davis. Dr. Richter has also completed a Master of Science degree in Executive Leadership at University of San Diego.
Dr. Richter’s experience includes serving on the Internal Medicine staff of Angell Memorial Animal Hospital in Boston, serving as Clinical Assistant Professor of Medicine at the Tufts University School of Veterinary Medicine and he was a professor at the Cornell University College of Veterinary Medicine. Dr. Richter was also on the Board of Directors of National Veterinary Associates, Inc., from 1997-2004.

A Diplomate of the American College of Veterinary Internal Medicine, Dr. Richter’s special interests include gastroenterology and liver disease. He is nationally recognized for his skill in endoscopic techniques including gastroduodenoscopy, colonoscopy and bronchoscopy. He has been a pioneer in veterinary thoracoscopy and laparoscopy, and he is also proficient in ultrasonography and percutaneous biopsy techniques. Dr. Richter is the founder, and served as the CEO, of the Veterinary Specialty Hospital of San Diego. He has authored several scientific articles and textbook chapters and lectures frequently at local, national and international scientific meetings as well as many veterinary colleges around North America. He has also collaborated with gastroenterology programs at the Boston University School of Medicine, Massachusetts Institute of Technology, UC San Diego Medical Center and Scripps Memorial Hospital.

Dr. Richter is also a past president and former board member of the Comparative Gastroenterology Society. Dr. Richter is on the Board of Regents of the American College of Veterinary Internal Medicine, and has had the distinction of being on the Board of Regents of the American College of Veterinary Internal Medicine previously, and has served on their examination and credential committees.

Over the course of 2016 and 2017, Dr. Richter has focused a significant amount of his efforts on developing and expanding the laboratory and scientific components of the organization. In May 2017, Dr. Richter was named Chief Applied Sciences Officer. This role allows him to deepen his involvement and further pursue initiatives and strategies for building the Ethos Diagnostic Science arm of the Ethos Veterinary Health mission and organization. Dr. Richter will continue to serve on the Ethos Board, as well as the Ethos Executive Team.

Laura Brandt DVM, 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.

Jessica Rogers BS

Operations Manager; Histopathology Manager, San Diego

Jessica grew up in the small town of Bishop, CA. She graduated with a BS in Animal Science from the University of California, Davis, where she also worked for several years in a veterinary histopathology facility. This is where her love for all aspects of veterinary diagnostics began, especially trimming biopsy samples. Since joining Ethos Diagnostic Science, Jessica has worked as a Client Service Specialist, a Laboratory Assistant, and Histopathology Manager. She is committed to customer service and providing the highest quality laboratory results. Jessica enjoys spending her free time with her husband, visiting the San Diego Zoo or Wild Animal Park and going to as many Padres baseball games as possible. Jessica also enjoys spending time with her pets which include two dogs, two cats and a horse.

Mindy LaFarga RVT, BS

National Laboratory Director, San Diego

Mindy is a native San Diegan and a 1987 graduate of San Diego Mesa College’s Animal Health Technology program.  She followed that up with a BS in Biochemistry and Cell Biology from University of California San Diego in 1997.  Mindy began working for the Veterinary Specialty Hospital laboratory in 1997 and has been instrumental to that initial hospital lab’s growth into the regionally renowned STAT laboratory, and now Ethos Diagnostic Science. Prior to dedicating her career to diagnostic laboratory sciences, Mindy worked hands on as an equine veterinary technician and has 10 years of clinical experience under her belt; she remains deeply committed to supporting the work of clinical practitioners. Her current focus is in continuing to grow Ethos Diagnostic Science to meet its fullest potential. When Mindy isn’t at the lab, she takes joy in kayaking with her husband, snuggling with her dog and cat, volunteering at church, reading, and going to the beach.

Dr. 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.

Dr. 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.

Barb Easton RVT, AS

Laboratory Manager - San Diego, San Diego

Originally from Wisconsin, Barb became a west coaster in 1982.  She attended San Diego Mesa College and graduated in 1987 with an AS in Animal Health Technology.  After getting her RVT license she worked at a local small animal hospital and then at the San Diego Zoo Hospital.  At both locations she quickly became essential to the in-house laboratory work. Her interest in diagnostics and laboratory testing advanced when she took a position as a laboratory technician for San Diego Mesa College in the Animal Health Technology program. Barb joined the laboratory in 1995, in its earliest inception as the clinic laboratory for Veterinary Specialty Hospital. Her experience as an educator has helped make Barb our most experienced trainer. She is also deeply committed to our quality assurance and quality control programs, overseeing consistency in protocols and procedures. Barb has special expertise in analyzer technology and microbiology. After work hours, Barb spends her time training and competing in herding trials with her champion German Shepherd dogs, Gina, Lobo, D, and Bruin.  She also enjoys riding her horse, Octavia.

Kristy Polkinghorn RVT, AS

Laboratory Supervisor, San Diego

Kristy was born and raised in San Diego, California. She attended Mesa College and graduated with an AS in 2007. She then went on to become an RVT. Before joining the STAT Lab team in 2011, Kristy worked at an equine hospital for 4 years. She loves laboratory science and its contribution to veterinary medicine for all species. Kristy especially enjoys hematology and is a top notch microscopist. Outside of the lab, Kristy cares for two Rottweilers (Piper & Kaiya), a Shepard Mix (Little Joe), and Squeaky the grey cat. Kristy is also a mother to two non-furry children. In her spare time she likes to go camping with her family, take her kids to different amusement parks, and goes to dog beaches with the dogs.

Kimberly Chapin BS

Client Relations Supervisor; 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 will be relocating 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.