
Kim Rennewanz
Director of Operations
Kim joined the SBS team in February of 2023 as Director of Operations. After working within many facets of the veterinary field for over 20 years, she brings diversity, an extensive background and experience to her role. Kim spent a large part of her career as a small animal veterinary technician specializing in Emergency/Critical Care and Internal Medicine. While working with a large and well known veterinary pharmaceutical company she fielded calls from veterinary professionals all over the United States. Her work included drafting reports regarding efficacy and safety for products that are still on the market today; these reports were later submitted to the USDA and FDA for review. Over the last 7 years Kim has worked as a Practice Manager at two very large facilities in Pennsylvania. Her love of horses began as a child, so she is very excited to be refocusing her career on equine services and all the great work being done at SBS. When not in the office, Kim enjoys spending time with her husband and daughters and training with her pit bull, Lilly, as they work towards certification as a therapy team.

Jonathan Clark
Vice President and Chief Operating Officer
Jonathan graduated from the University of Delaware in 1999 with a Bachelor of Science Degree in Animal Sciences. While obtaining his degree, he started working for SBS in 1994 by assisting Paul with routine lab cleaning. He began gaining more responsibility in the company by becoming a freeze technician, helping to pioneer the mobile lab use throughout the East Coast, and becoming the leader of the import/export department in Maryland. Now, he dutifully holds the roles of Vice President and Chief Operating Officer for Select Breeders Services. Though he still enjoys occasionally spending time in the mobile lab, Jonathan oversees and assists the managers of SBS Veterinary Services, Select Breeders Services Headquarters in Maryland and Select Breeders Southwest in Texas with their daily operations. When not in the office, he spends his time focusing on the warmblood breeding operation he and his partner created.

Dr. David B. Scofield DVM, MS, DACT
President and Medical Director
Dr. Scofield grew up in Delaware and on the eastern shore of Maryland. After college in North Carolina, he received his DVM from Oklahoma State University in 2009. Following graduation, Dr. Scofield completed an internship at Weatherford Equine Medical Center in Weatherford, Texas and later joined Colorado State University’s Equine Reproduction Laboratory for a residency in Equine Reproduction. His research focused on anti-microbial agents for bacterial and fungal infections in mares. His day-to-day activities included managing reproductively challenged mares and stallions, embryo transfer, foaling mares, high-risk pregnancies, and neonatal foals.

Paul Loomis MS
Founder and CEO of Select Breeders Services Inc.
Paul established Select Breeders Services in 1987 and developed the company to become the largest provider of equine semen preservation services in the world. As CEO of the company, Paul directs the international network of affiliated laboratories. During 1987-1992, Paul was also Director of Biological Research at Hamilton Thorn Research Associates. Hamilton Thorn is best known in the horse industry as developers of the Equitainer system for cooled transported semen and instrumentation for computerized sperm motility analysis. Prior to SBS and Hamilton Thorn, Paul was VP/General Manager of Green Hills Farm, Inc in Aiken, SC a large sport horse breeding facility. Here Paul developed (what was then) the largest commercial frozen semen breeding program for horses in the U.S.
Paul is a recognized expert in the field of semen preservation. He is a graduate of Colorado State University with a M.S. in Physiology (Equine Reproduction). He is the author of numerous scientific journal articles and regularly lectures worldwide in the areas of equine reproduction and semen preservation.