Dr. Jill Mason received her undergraduate degrees in Biology and Chemistry from Newman University, and she received her medical degree from the University of Kansas, School of Medicine. Dr. Mason completed her residency at the University of Kansas, Wesley Medical Center, and had the prestigious honor of being elected Chief Resident during her last year of residency.  She is board certified in pediatric and adolescent medicine.  In addition, Dr. Mason received the Dean’s Award for Clinical Teaching, and was also the recipient of the Kansas Newman Presidential Scholarship in recognition of her academic achievements and community service.

After residency Dr. Mason moved to Hays, Kansas where she was one of four pediatricians serving western Kansas and eastern Colorado.  After gaining valuable experience in this high volume setting, she relocated to the Denver area in 2006 and joined Rose Pediatrics in 2010.

Dr. Mason is a Kansas native and still cheers for the Kansas Jayhawks.  She is proud to say she was present when KU won the national championship in 2008. She enjoys playing and watching sports and has adapted well to our Colorado sports climate.  She is married and has one son. She enjoys spending time outdoors and loves traveling with her family.   In 2008 Dr. Mason traveled to Juarez, Mexico where she served on a medical mission team that provided medical care to infants and children.  Her experience in Mexico was deeply rewarding and she continues to seek an opportunity to return.

After graduating from high school, Dr. Jennifer Harr moved from the small town of Niwot, Colorado to Malibu, California and earned her B.S. in Biology from Pepperdine University. She completed her medical degree as a Doctor of Osteopathy at Midwestern University Arizona College of Osteopathic Medicine in Phoenix, Arizona in 2004. Dr. Harr then returned to Colorado and completed her pediatric residency at the Children’s Hospital Colorado in Denver in 2008. Dr. Harr started her pediatric career in Brighton, CO, practicing there for 3 years before moving to Washington DC for a year, where her husband was completing a surgical fellowship.  During that year she practiced as a general pediatrician in Virginia and got to take in the many sites of our Nation’s Capital. Dr. Harr moved back to Colorado in 2015 to join Rose Pediatrics at Highlands Ranch.

Dr. Harr loves to get to know her families and to watch their children grow.  She is passionate about infant health and development and is a strong advocate of breastfeeding.  Dr. Harr is actively involved in the education of future pediatricians, mentoring many medical students in the past 10 years. She is board certified by the American Board of Pediatrics and is a Fellow of the American Academy of Pediatrics.  Dr. Harr is happily married and has 2 adorable girls. Together they enjoy traveling, hiking, spending time out on the lake, and skiing.

Dr. Ross grew up in Westfield, Massachusetts and is the oldest of three boys. He decided he wanted to become a doctor to help heal sick children and keep them healthy after he was treated for leukemia as a teenager. He has always loved working with children and throughout his career has enjoyed working as a volunteer at Children’s Hospital and at camps for sick children.

In 2005, he attended Harvard University where he graduated with his Bachelors’ Degree in Biochemical Sciences. It was also during college that he met his future wife, Lela. After college, he attended UCLA where he received his Medical Degree and his Masters of Public Health. He and his wife moved to Colorado in 2014 to complete his pediatric residency training at the University of Colorado / Children’s Hospital Colorado.

Dr. Ross loves his new home here in Colorado. He and Lela are now married and welcomed a son, Nathan, into their family last year. They have two cats, Amos and Josie, that are always getting into trouble around the house. In his free time, Dr. Ross likes spending time with his family, exploring the outdoors while hiking and camping, trying out new recipes, and watching the latest movies and TV shows.

“My journey in healthcare started sixteen years ago as a CNA, forever asking questions in healthcare and seeking the evidence that surrounds them. I am an energetic, passionate, and creative person who loves to transform things for the better. The way I practice ultimately is designed to create an empowered generation that experiences health in every facet of their lives. I have strong ethics and morals that I have maintained throughout the years of working my way from being a CNA until finally obtaining my Doctorate as a Pediatric Nurse Practitioner with an emphasis in mental health. I will be honest with you and share the practical “pearls” I have learned throughout this journey to become an expert in pediatric care. I will provide you every piece of information that I can to ensure you are able to make informed, safe decisions. I am extremely thorough and enjoy the complexity of medicine. I specialize in acute illness, mental health, obesity prevention, sexual abuse prevention, and preventative medicine as a whole.

In my personal life, I am an avid hiker, world traveler, rock climber, and yoga enthusiast. Dogs are my favorite people. Ultimately, I live my life in a way that serves as an example of what healthy truly looks like.”

Hannah is a board-certified Pediatric Nurse Practitioner and International Board-Certified Lactation Consultant (IBCLC) with a special focus on newborn care, lactation, and supporting parents through early parenthood. She is passionate about helping young families feel confident and empowered and takes pride in being a good listener who helps families feel seen, heard, and understood. Her goal is to serve as both a partner and a trusted resource in every family’s parenting journey.

Before joining Rose Pediatrics, Hannah spent four years providing primary care at the Children’s Hospital of Philadelphia. She earned her CPNP certification from Gwynedd Mercy University in 2017 and holds a Health Science degree from Northeastern University in Boston, where she played Division I field hockey. She began her career as a pediatric nurse caring for medically complex infants and children.

Originally from South Dakota, Hannah has also lived in Vermont, Boston, and Philadelphia before settling in Colorado with her husband Don, their two children, and golden retriever Boomer. Outside of work, Hannah is a sports enthusiast who enjoys spending time with her family, exploring the outdoors and reading.