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Billings Clinic PGY1 pharmacy residents are highly motivated individuals who contribute significantly to clinical pharmacy services and organizational initiatives.

Current Residents

Brittany Berg, PharmD, RPh (

Brittany Berg grew up in the small town of Hobson, Montana. She completed her undergraduate studies and pharmacy education at the University of Montana (UM) in Missoula. In May 2017, she received her Doctor of Pharmacy degree from UM. While in pharmacy school, Brittany worked as an inpatient pharmacy intern at Billings Clinic and was active in different pharmacy organizations, including Kappa Epsilon where she served as President. Brittany completed several experiential rotations at Billings Clinic when she was a student pharmacist, and she started her postgraduate year one (PGY1) pharmacy residency in July 2017.

Brittany’s practice interests include critical care and emergency medicine. In her free time, Brittany enjoys baking, riding horses, and spending time on her family’s cattle ranch near Columbus. Brittany lives in Park City with her husband, Trevor, and their two dogs.

Brianna Kajacob, PharmD, (

Brianna Cajacob grew up in Faribault, Minnesota. After high school, she moved to California for her undergraduate studies and received her bachelor’s degree from the University of San Diego. Upon graduation, she was commissioned in the U.S. Navy, and spent the next four years stationed on ships in San Diego. She then transferred to a naval base in Washington, DC, where she worked with combat wounded sailors and marines. During that time, she decided to pursue a career in pharmacy, so she moved to Salt Lake City to attend the University of Utah (UT) and received her Doctor of Pharmacy degree from UT this past May. Brianna started her PGY1 pharmacy residency at Billings Clinic in July 2017. Her professional interests include cardiology, infectious diseases, and drug information care.

In her free time, Brianna enjoys spending time outdoors with her husband, Adam, and their energetic husky named Kapik. They love trail running, hiking, camping, and fishing together. Brianna also volunteers to foster dogs through a few different rescue organizations. Additionally, she enjoys traveling and spending time with her family.

Ryan Gumbleton, PharmD (

Ryan Gumbleton grew up in Troy, Michigan, a suburb of Detroit. He attended Siena Heights University in Adrian, Michigan for undergraduate coursework where he studied biology and played varsity lacrosse. Ryan was then accepted into Ferris State University in Grand Rapids, Michigan, where he completed his Doctor of Pharmacy degree in May. Ryan moved to Montana in June and started his PGY1 pharmacy residency at Billings Clinic in July 2017.

Ryan’s professional interests include critical care, emergency medicine, and infectious diseases. He plans to complete a second-year specialty pharmacy residency (PGY2) in critical care.

Ryan enjoys playing hockey and lacrosse in his free time. He had the opportunity to coach Ferris State’s men’s lacrosse team while in pharmacy school and held individual sessions with players of all ages. He also enjoys hiking, fishing, hunting, and snowboarding. Ryan just got married in October; his wife, Alisha, is an occupational therapist.

McKinley Mitchell, PharmD (

McKinley Mitchell grew up in the southeastern U.S. but moved with her family every two to three years from birth through her college graduation due to her dad’s job. McKinley attended the University of Georgia for her undergraduate studies and received her Doctor of Pharmacy degree (PharmD) from the University of Georgia’s College of Pharmacy in Athens, Georgia this past May.

Excited to escape the humidity of the southeast, she and her husband moved to Billings mid-June and eloped in Big Sky. Six inches of snow the day before their ceremony was a welcome surprise! McKinley visited Montana on a family trip five years ago, and she has been looking forward to living out west ever since. McKinley and Chandler enjoy road-trips, hiking, and camping together and look forward to exploring the national parks and forests in Montana. McKinley also spends her free time by running, reading, and cooking.

McKinley’s professional interests include internal medicine, addiction, and psychiatry. McKinley began her PGY1 pharmacy residency at Billings Clinic in July 2017. She plans to pursue a PGY2 specialty pharmacy residency in psychiatry.


Listing of Former Residency Graduates

What residents like about the Billings Clinic PGY1 Pharmacy Residency


"My favorite part of being a resident at Billings Clinic is the people I get to work with on a daily basis. Not only are the preceptors brilliant pharmacists and wonderful teachers and mentors, but the entire pharmacy department supports us as residents and monumentally contributes to nurturing our clinical knowledge and practice skills on a daily basis."

"The best thing about doing a PGY-1 residency at Billings Clinic is the PRECEPTORS. You cannot ask for a better group of compassionate, knowledgeable, and passionate pharmacists to learn from."

"My preceptors and co-workers make this residency one of the best and I’m so grateful for the experience to learn from highly trained practitioners that consistently provide the best patient care."

Interdepartmental Collaboration

"Another aspect I love about being a resident at Billings Clinic is how well respected pharmacy is within the institution by all departments and providers."

"Almost all rotations involve a daily rounding component where pharmacists are a critical part of the healthcare team and help providers make important clinical decisions. Pharmacists are sought out on a daily basis to assist in drug-related questions and we make interventions daily."

Patient Care

"You can directly see the impact you make on the patients and their health."


"I also love the flexibility within the residency. I have been able to explore many different interests, which has helped me discover where my true passions are and where I see myself headed in the future."