Our Residents
PGY-1
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Blake Martin, MD
Medical school: University of Utah School of Medicine
About me: I grew up in Idaho and attended Idaho State University, graduating with a degree in microbiology. After graduating, I spent three years cultivating my interest in emergency medicine as an emergency room technician and ski patroller. From there I attended medical school at the University of Utah in Salt Lake City. Outside of the hospital, I enjoy just about any activity in the great outdoors, mainly rock climbing, mountain biking, whitewater kayaking, and skiing.
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Jenn Mickelson, DO
Medical school: Pacific Northwest University (PNWU)
About me: I was born and raised in Missoula, Montana - go Griz! I studied Political Science in undergrad at University of Portland, Oregon, where I developed a passion for healthcare policy and healthcare access. I attended medical school at PNWU and completed my clinical years in Walla Walla, Washington - right in the heart of wine country. While I was there, I worked in the tasting room of Vital, a nonprofit winery doing great work in the agricultural community (check them out!). Outside of medicine, I love to ski, backpack, quilt, read, and bake, and I spend my free time with my husband, Joel, and our dog, Truffle. Joel and I share a mutual love of good coffee, traveling, going to concerts, and chasing happy hours. I chose Dartmouth Hitchcock Medical Center for its rural medicine focus within a strong academic community, surrounded by beautiful land and endless outdoor access.
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Avery Pullman, MD
Medical school: University of Massachusetts T.H. Chan School of Medicine
About me: Hey! I’m Avery. I grew up in Massachusetts, just outside of Boston. From an early age, I was drawn to the outdoors and wanted to see more of the country, so for undergrad, I headed as far as I could to Santa Barbara, California. Four years of sunshine later were enough to teach me that I missed the seasons, especially fall and winter, too much to be a Southern California lifer. So after college I moved back to the East Coast where I eventually started medical school at UMass.
Pretty early on into med school, I found myself gravitating towards the ED. The people, the breadth, and the pace gave me everything I loved about medicine. While on the interview trail as an M4, I knew almost instantly that Dartmouth was the place for me. It felt rare to find a place that offered such a tight-knit community, incredible training, and high acuity - all in a place where you can ski, bike, fish, or run before or after a shift.
Whenever I have time off, you'll find me doing one of those activities, usually with my wife, who happens to be an Internal Medicine resident here too (shoutout to the couple’s match)!
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Josh Rovner, DO
Medical school: Philadelphia College of Osteopathic Medicine
About me: I'm from New Jersey, by way of just about everywhere else. Next stop, Dartmouth! For the medicine, the mountains, and the opportunity to own more fleece than any one person reasonably should. At 6’10'' tall, I have accepted my role in the ER changing smoke detector batteries, reaching supplies nobody else can get to, and stashing all the good snacks just out of reach. Outside of the hospital, I spend most of my time riding bikes, trail running, hanging with our not so little puppy, Llama, and tinkering on (breaking) something that maybe I should have just left alone. I'm super excited to train alongside an incredible group of people and can’t wait to see where the world of emergency medicine will take me.
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Madison Sharpe-Deyarmin, DO
Medical school: Lake Erie College of Osteopathic Medicine
About me: Hi I’m Maddy! I am a New Hampshire Native and grew up in southern New Hampshire. I completed my undergraduate studies at Rivier University in Nashua, where I earned a degree in biotechnology and a minor in psychology. During my time at Rivier I was a member of the women’s soccer team and worked as an EMT for my hometown. I went on to attend medical school at LECOM in Erie Pennsylvania. Outside of medicine I enjoy hiking, camping, kayaking and crocheting. I am so excited to be starting residency at Dartmouth Hitchcock Medical center!
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Alisha Weinstein, DO
Medical school: Lake Erie College of Osteopathic Medicine
About me: I grew up just outside of Boston, Massachusetts as the middle of seven kids. When I am not in the ED, you can usually find me running, swimming, biking, hiking, or planning my next trip. I recently completed my first half Ironman with my wife and while I swore, I would never do another one during the race, I am already looking for my next challenge. I love exploring New England, traveling whenever I get the chance and spending as much time outdoors as possible. At home, my wife and I enjoy relaxing with our three cats who somehow manage to keep us entertained and remind us that they are really the ones in charge.
PGY-2
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Trent Bohan, MD
Medical school: University of North Dakota School of Medicine
About me: Hi Mom and Dad! I grew up in Bismarck, North Dakota as the youngest of 4 siblings. All 3 of my siblings have engineering degrees, so they really put the pressure on me to make something of myself. Unlike my siblings, calculus makes my head spin. Thus, I decided to pursue something easier in life—medicine. I graduated with my bachelor’s degree from the University of North Dakota in Medical Laboratory Science in 2018. Afterwards, I joined the workforce as a full time Lab Tech/part-time ski bum in Denver, Colorado. After getting my fill of powder days (and I-70 traffic), I returned to my alma mater for medical school where I discovered my love for emergency medicine. While in the ED, I was once told I am “as cool as a cucumber” which is probably the best complement I have ever received. Outside of medicine I love all things outdoors but especially downhill skiing, hiking, and camping. I am a huge Minnesota Twins fan and recently started collecting baseball cards. I also have a yellow lab named Lilo who loves to play, go on walks, and collect ticks. We love having access to our favorite activities just minutes away! I couldn’t have been happier to match at Dartmouth’s Emergency Medicine Residency. I fell in love with the Upper Valley the moment I arrived for my second look, and I am super excited to explore the area more over the next few years. The landscape is VERY different than North Dakota. I feel fully supported here at every level of the program and the opportunities seem endless. I could not have picked a better place to train, and I feel like I have found a second home here.
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Matt Breseman, MD
Medical school: University of Vermont College of Medicine
About me: I grew up in Addison, Illinois. Along the way I played hockey and studied aeronautical engineering before eventually making my way to the University of Vermont for medical school. I’m very excited to be joining the Dartmouth team for emergency medicine residency in the beautiful Upper Valley. In my free time, I enjoy exploring the outdoors with my wife, kids, and Brittany pup. My hobbies include hockey, skiing, paddle boarding, and losing balls on the golf course. I’m also in a fierce RowErg competition with my wife to log the most meters which sadly I’m losing badly.
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Liberty Gendron, DO
Medical school: Lake Erie College of Osteopathic Medicine
About me: I was born and raised in New Hampshire, adopted from foster care into a large and loving family. Growing up I was a competitive gymnast and cross-country runner. On the weekends, if I wasn’t at gymnastics or a cross-country meet, I was camping with my family. I attended Saint Anselm College and I majored in biology with a minor in chemistry. During college I volunteered with the college’s EMS team. After college I took a gap year and worked full-time as an EMT for a private ambulance company. I always knew I wanted to be working in an emergency department, after a couple months on the ambulance I got a job as an emergency department technician right here, at Dartmouth Hitchcock Medical Center. This experience reaffirmed that I wanted to pursue emergency medicine as my career. I left New Hampshire for medical school at Lake Erie College of Osteopathic Medicine in Elmira, New York. Throughout the many rotations emergency medicine remained my favorite. I am so glad to be back at Dartmouth Hitchcock Medical Center, where I was able to learn, grow, and witness amazing training. Outside of medicine, I love to go on walks with my fiancé and our 3 dogs. I also enjoy many outdoorsy activities including running, hiking, pickleball, kayaking, paddleboarding, and skiing.
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Jack Gorham, MD
Medical school: University of Kansas School of Medicine
About me: I was born in Southern California but spent most of my childhood here in New Hampshire. I studied saxophone performance at the University of New Hampshire and continued afterwards when I moved to Kansas City. My journey in emergency medicine began during my freshman year of college when I became an EMT, eventually leading me to graduate from the University of Kansas School of Medicine. In my free time, I still try to play as much music as I can, mostly piano and saxophone. My partner and I have 3 dogs and we’re excited to spend the next couple years perfecting their 100-year-old bungalow.
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Holden Mayfield, DO
Medical school: Oklahoma State University College of Osteopathic Medicine
About me: I’m originally from rural Oklahoma, where I grew up on a working cattle ranch and spent much of my early life outdoors—showing cattle, helping with daily ranch chores, and learning the value of hard work, grit, and community. These roots shaped who I am today and continue to influence how I approach medicine, leadership, and life. My medical education took place at Oklahoma State University, where I further developed a strong interest in rural and community health. I chose emergency medicine because it allows me to meet patients in their most critical moments, think quickly, and provide care that makes a tangible difference—whether in a rural ER or a busy urban hospital. I chose Dartmouth because of the people. From faculty to residents, everyone I met was grounded, approachable, and passionate—not just about medicine, but about life beyond it. I wanted a training environment where mentorship felt like family and where wellness and personal growth were just as important as clinical excellence. The Upper Valley felt like home the moment I arrived—with its strong sense of community and access to nature, it’s the perfect place to train and grow. Outside the hospital, I stay active with weightlifting, running, hiking, and playing sports. I love the outdoors and spend as much time as I can fishing, hunting, and going on new adventures with my wife, Emma. We’re always exploring—whether it’s a quiet trail in the woods or a spontaneous road trip to somewhere we’ve never been. Dartmouth offered not only the academic excellence I was looking for, but the lifestyle and values that align with who I am.
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Hilary Merrifield, MD
Medical school: School of Medicine at Quinnipiac University
About me: I grew up in a small town in Midcoast Maine surrounded by my large, close-knit family. I completed my undergraduate studies at the University of Maine where I earned a degree in Biology with a minor in Studio Art. During my time at UMaine, I competed on the NCWA Women’s Wrestling team and worked as both an EMT and ED Tech, experiences that shaped my interest in rural emergency medicine. I went on to attend medical school in Connecticut at Frank H. Netter MD School of Medicine at Quinnipiac University. Outside of medicine I enjoy hiking, skiing, camping, kayaking, painting, and quilting, as well as spending time with friends and family. I am so excited to be starting residency at Dartmouth Hitchcock Medical Center alongside my husband, Tristan, and can’t wait to explore the Upper Valley!
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Nathan Strong, MD
Medical school: Oregon Health Sciences University School of Medicine
About me: I have lived all over the world before coming here for my residency in emergency medicine. I have a strong passion for rural healthcare and pre-hospital medicine. Additionally, I am a former paramedic and currently serve as an officer in the Army, which brings a whole other dimension to my life. When I'm not working, you can usually find me exploring new places through travel, hitting up challenging hiking trails, or casting a line and hoping for a big catch while fishing.
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Vasilis Vasiloudes, MD
Medical school: University of South Florida College of Medicine
About me: Hello! I grew up in Tampa, Florida, supported by my parents, 3 siblings, and a long list of important people along the way. My undergraduate years were spent enjoying the eclectic culture of Los Angeles while attending the University of Southern California. After completing studies in Human Biology and Occupational Science, I returned to Tampa for medical school. At that time—funny enough—Emergency Medicine was the last specialty I saw myself pursuing. Following my third year of medical school, I took a year off to study with a movement research and arts company based in Athens, Greece. It was during these seemingly unrelated endeavors that the practice of Emergency Medicine captured my interest. Once I was back in the world of medicine and on the interview trail, I felt a deep sense of relief after interviewing at Dartmouth. I was encouraged to be my honest self, and it felt like that authenticity was genuinely valued. It’s an incredibly supportive environment that offers a refreshing approach to medical education. Beyond that, Dartmouth provides unique training experiences that answered my call to adventure—all set in a part of the country that allowed me to step away from urban life and experience Le Quattro Stagioni, as they say. In my free time, I engage in the expressive arts of movement, writing, and music. I love to stay active, learn new things, and be outside. I would be remiss if I didn’t mention my love for the band King Gizzard and the Lizard Wizard, the mythic realm, and depth psychology. That said, I’m grateful to be where I’m at and happy to be a part of such an amazing team!
PGY-3
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Nicholas DiLosa, DO
Medical school: Lake Erie College of Osteopathic Medicine
About me: I grew up with 3 brothers in Elkridge, Maryland, just outside of Baltimore, and I studied Biological Sciences at University of Maryland, Baltimore County. After graduating, I worked as a medical scribe for a few years before enrolling in the Special Master’s Program at Georgetown University, where I graduated with a Master’s in Physiology and Biophysics. I was part of the first class of medical students at LECOM’s campus in Elmira – a small town in upstate New York. In the summer after first year, I drove cross country on a road trip to hike and camp in several National Parks with some friends from medical school. I brought a friend’s very old camera and quickly discovered my love for both hiking and adventure photography. Over the past 3 years, I have been on several road trips through various parts of the country (including Canada!), and I have visited and photographed nearly half of the National Parks in the United States (~30). Over the past year, my partner Alex has introduced me to multipitch trad and sport climbing, and we have enjoyed breaking up our hikes with a long day of climbing. When I’m not traveling to my next adventure, I often like to stay inside with my 2 cats, record some guitar, play video games, or read a book. I am thrilled to start residency at Dartmouth. I spent a month during fourth year of medical school in the ED here and felt at home. It was a pleasure to be surrounded by a compassionate and intellectually driven ED team with similar interests outside of medicine. I truly feel enabled to become the best physician I can be, and I can’t wait to continue my education at Dartmouth.
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Samuel Kocen, MD
Medical school: Geisel School of Medicine at Dartmouth
About me: I am from sunny California but have been in New England for the past 10 years completing my education. I attended Dartmouth for medical school and I'm thrilled to continue my medical training here in the Emergency Department. Outside of medicine, I find balance and joy in exploring the great outdoors through hiking, biking, and skiing, soaking in the natural beauty that New England has to offer.
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Britney Lee, DO
Medical school: Campbell University School of Osteopathic Medicine
About me: Originally from beautiful Southern California, just east of Los Angeles, I spent my formative years soaking up the sunny vibes of the West Coast. Homeschooled for most of my primary education, I later pursued a Bachelor’s degree in Cultural Anthropology at Vanguard University. Before discovering my passion for medicine, I gained valuable experience in customer service and hospitality management. A lackluster day crafting lattes prompted me to seek a career with a deeper impact on the world. Following my mom’s suggestion, I pivoted to medicine—a decision I've never regretted. Recently married amidst the breathtaking landscapes of Utah’s Salt Flats, my partner and I share our home with our beloved fur-baby, Pickle. Outside of medicine, I indulge in my love for travel, baking, exploring new restaurants, and crafting both intricate coffees and creative cocktails.
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Jacob Markwood, MD
Medical school: Geisel School of Medicine at Dartmouth
About me: I spent most of my growing up years in rural Vermont. After high school, I operated the family sawmill and built timber frame barns for a few years. During this time, I took a wilderness first responder course and discovered my passion for emergency medicine. The next step was becoming an EMT and volunteering for the local ambulance service before completing training as a critical care paramedic. My desire to learn could not be quenched, so I went back to school and graduated from Norwich University with a major in Biology and a minor in Chemistry. Thankfully, it was only a short trip down I-89 for medical school after being accepted here at Geisel. Each medical school rotation confirmed my dream of becoming an Emergency Medicine Physician. I decided to stay at Dartmouth for residency due to the diversity of training experiences, the amazing teaching by faculty, mentorship and research in prehospital and critical care medicine, and opportunity to be involved with DHART the helicopter and specialty care transport team. Outside of work I enjoy spending time with my wife, our 3 children, and the newest addition to the family, our puppy Coco. The idyllic community of the upper valley provides a plethora of activities including cycling, hiking, and ice hockey. I am delighted to join the Dartmouth EM family!
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Brittney Martinez, MD
Medical school: Hackensack Meridian School of Medicine
About me: I was born in New Jersey, but spent most of my childhood in Onalaska, Wisconsin in the outdoors. My family moved back to New Jersey while I was in the middle of high school. I attended Ohio State University where I studied Human Nutrition. I was torn between a career in dietetics or medicine, but ultimately decided I could bring my passion for nutrition to a career in medicine. My husband is also a Buckeye! He grew up in Ohio, and we met at TOSU. I took a gap year after graduation and spent it working at Riverside Methodist Hospital in Columbus, Ohio on a med-surg floor. I moved back to New Jersey to attended medical school at the Hackensack Meridian School of Medicine in July of 2020. This is a newer medical school based out of Nutley, New Jersey. I married my husband after my first year of medical school, and we had our first daughter during October of my third year. We had our second daughter on Christmas Eve of fourth year. We also have 2 dogs! I began medical school with the intent of pursing emergency medicine, and was confident this was the field for me after enjoying all of my rotations! I love that we can do and see a little bit of everything in the ED! In my free time I enjoy hiking, baking, reading, gardening, and spending time with my family. I chose Dartmouth Hitchcock Medical Center for the kind people and respect of this academic institution in a safe location with so much to do outside! I am already loving the Upper Valley and cannot wait to see what the next 3 years bring!