Dr. O’Brien received her BS in Animal and Poultry Science with the Livestock Production/Business Emphasis degree in 2000 from Virginia Tech and her DVM from VMRCVM in 2004. She is the past-president of the Virginia Academy of Food Animal Practioners. Dr. O’Brien enjoys horseback riding, hiking, playing with her border collie, Meg, and spending time with her family on their dairy farm.

Dr. Hausler attended the University of Wisconsin River Falls before being accepted into the University of Minnesota where he completed his DVM in 2013. Originally from Wisconsin, Kiel was born in Lancaster and raised in Stevens Point on a beef and bison farm where he also grew up showing Simmental cattle. He recently made the move to the gentler climate of Virginia with his wife, Alex, and their cat named Granite. Kiel loves to explore the great outdoors and enjoys running and hiking. He is also passionate about working with the local 4-H program and kids interested in raising and showing livestock.

Dr. Burke is a native of Page County Virginia, where he grew up on the family farm raising swine and beef cattle.  After graduating from Page County High School, he became a life-long Hokie, earning his B.S., M.S., and DVM from Virginia Tech in 2011.  As a veterinarian, Nathaniel has worked as an ambulatory large animal clinician in PA, a mixed animal veterinarian in the Shenandoah Valley and as a field veterinarian for the VA Department of Agriculture.  he is married to Dr. Sarah Krall (VMRCVM ’10), who he met in veterinary school, and has a son, Grayson and a daughter, Anna Mae.   Nathaniel enjoys good music, travel, and cuisine, especially when combined with family and friends.  He is a devoted fan of Virginia Tech athletics and has enjoyed seeing his young son bloom into a football fanatic, even in a down year.  He also relishes the chance to spend time fishing and can be found casting a line somewhere on The Shenandoah River or along The Outer Banks whenever time permits.

Dr. Humphreys was born and raised in Dallas, Texas, and has had a passion for animals and veterinary medicine from an early age. In 2017, he moved to Virginia to take over his grandparents’ beef cattle farm—a major turning point that deepened his commitment to animal care and rural life.

His journey with Rose Hill Veterinary Practice began long before his formal education. He started shadowing with us in 2015 as a high school student, showing a genuine curiosity and dedication that has only grown over the years. After earning his bachelor’s degree from Denison University in Ohio, he went on to complete a Master of Science at George Mason University.

From 2020 to 2021, Dr. Humphreys worked with us as a valued member of the team before enrolling in veterinary school. He continued to return during the summers, strengthening his clinical skills and building lasting relationships with clients, patients, and staff. He graduated from Cornell University College of Veterinary Medicine in 2025.

Outside of veterinary medicine, Dr. Humphreys remains deeply connected to farm life. He enjoys working with his cattle, managing the land, and spending time outdoors fishing and hiking. At home, he shares life with two dogs, two cats, and values quality time with family and friends.

Dr. Humphreys brings a unique combination of large animal experience, academic excellence, and heartfelt community values to our practice. We are absolutely thrilled to welcome him back to the Rose Hill family in a full-time role.