Current Fellows

Braden Sciarra, MD - Chief Fellow

I was born and raised in Southern Indiana and completed my undergraduate degree in chemistry at Butler University in Indianapolis, IN. After college I stayed in Indiana where I completed my medical training at Indiana University School of Medicine. While in medical school I had the opportunity to work closely with physician leaders within the Division of Infectious Diseases, and completed international health rotations in Eldoret, Kenya. Next, I travelled to Milwaukee, WI to complete residency in Internal Medicine & Pediatrics. During my training I developed an interest in HIV medicine and improving access to care for persons living with HIV. In my spare time I enjoy hiking, travel, and exploring new restaurants and breweries. 

Zachary Cantor, DO

My name is Zachary Cantor, I am from Detroit, Michigan. I went to medical school at Touro University Nevada and completed my residency at Detroit Medical Center/Wayne State University. I love all things ID but am particularly interested in HIV/primary care. I enjoy having continuity of care and seeing my patients' health improve over time. Outside of work, if the weather is nice, I'm almost certainly on the golf course. Otherwise, I love doing anything active and seeing live music. 

Sawyer Ricker, MD

I was raised in Texas and have traveled to most US states during trips with my family and friends, as well as for my professional medical life. I also have traveled to several oversea scenic/outdoor destinations such as New Zealand and Iceland, and I studied for medical school in Grenada. I enjoy staying active through outdoor activities such as hiking, kayaking, and swimming as well as through sports such as snowboarding, frisbee, and tennis. I also partake in a good amount of less adrenaline-fueled activities such as playing videogames and indulging in sci-fi/fantasy media (namely reading or TV). I have many other interests which include attending concers, history, playing electric guitar, and martial arts. Overall, I consider myself a well-rounded person with a broad range of interests. After my ID fellowship, I plan on pursuing a critical care fellowship to become ID/Crit certified. 

Maxwell Witt, MD

I grew up in the San Francisco Bay Area. As the son of an ID Physician, I was exposed to the field at an early age. (Sorry, terrible pun). I studied public health as an undergrad at UC Berkeley, and I did research on the pertussis vaccine's effectiveness during the epidemic in 2009-10 as well as studies evaluating the effectiveness of Hepatitis C medications within the Kaiser system. Before medical school, I did a fellowship as an analyst with the Health Resources and Services Administration (HRSA) Division of Transplantation, where I focused on improving the use of marginal donated kidneys, but also helped with the division's response to Zika virus. I went to medical school at the University of Michigan and completed my residency at University of New Mexico. My academic interests include host-pathogen interactions and hospital epidemiology. I also have a lot of interest in vector borne disease. Outside of medicine, my interests include mechanical work (Vintage cars mainly) and aviation. I recently finished my pilot's license, after having refurbished a small plane as part of a flying club I started with a friend. 

Brandon Brummeyer, MD

My name is Brandon Brummeyer “Broom Meyer.” I was born and raised in Wisconsin between Milwaukee and Green Bay! I completed my undergraduate in Wisconsin, and I used to work at Culver’s, and I worked as a nursing assistant at a nursing home, the night shift. I went to medical school in Madison, WI and completed residency in Cleveland, OH in med-peds. I like to try most things once, my hobbies including hiking, camping, fishing, collecting board games, and trying archery. I enjoy the beach too! I am scuba diver certified and dove in the Belize Barrier reef, I love traveling to Belize and have worked at one of the clinics multiple times! I am interested in global health and want to study the global and local burden or MDROs and coming up with global, public and One health solutions for the ongoing problem! I am excited to be in Colorado and escape into nature and willing to try skiing!

Kirk Fetters, MD

I was born and raised in Stockton, California, but married a Coloradan just after college and moved to Aurora for medical school. I’ve been interested in ID as long as I have known about it as a specialty and can’t wait to get started! I love to hang out with my wife and dog, go wine tasting or out to breweries, listen to podcasts, read a wide variety of books, and ski (like every other CO transplant!). Professionally, I’m interested in HIV and urban underserved populations, though I’m open to all the new experiences in fellowship. 

Tommy King, MD

My name is Tommy King, and I am a native of the Chicago area. Prior to starting medical school at Rush University in Chicago, I worked for a federally qualified health center, Erie Family Health. Part of my job was supporting the program that provided care to patients living with HIV, mainly on the West side of Chicago. That was where my interest in Infectious Diseases began! I stayed in Chicago for Internal Medicine Residency at Rush, where I had incredible mentors who helped to further my passion for the field of ID. My main areas of interest are HIV medicine as well general and Orthopedic ID. I’m very excited to be in Denver and take advantage of opportunities to hike, ski, and be outdoors in the beautiful Rocky Mountains. One of my bucket list items is to visit all 63 US national parks!

Rebecca Unterborn, MD

I'm Rebecca and am wrapping up residency here at the University of Colorado. I've absolutely loved my time here in Denver so far and am really looking forward to staying for fellowship! Professionally, I am interested in transplant infectious disease, and I love medical education as well. Outside of medicine, I enjoy spending time with family and friends and particularly love experiencing new restaurants or trying new recipes at home. I live with my husband, Drew, and we recently moved to the Central Park area, and I am lucky to have my sister in Denver too (she is actually a nurse in the stepdown unit at UCH!). I like to stay active and enjoy skiing in the winter and going for walks in the spring/summer (with the occasional Orangetheory class mixed in). I am so excited to be a fellow here next year and can't wait to meet everyone!