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Meet Our Fellows

Our Hematology/Oncology fellows come from across the U.S. and around the world. While all of our trainees have a love of learning and a compassionate approach to patient care, they come from diverse backgrounds, family status, and professional and personal interests. Our fellows and faculty foster a collegial environment and education-focused culture that provides an inclusive learning experience. Training can be challenging, but our program is close-knit and each resident brings a dedication to providing stellar patient care as well as a collaborative learning experience.

Daniel Almquist, M.D.

Daniel Almquist, M.D.

What is something you love most about this program?

I love the ability to work one-on-one with the faculty. The program faculty are insightful, up-to-date, and at the forefront of research and clinical practice. We have the opportunity to partake in numerous clinical and research activities. The faculty helps us develop clinical skill but they also mentor us in clinical, translational, and laboratory research. I love the fact that our faculty help shape my career into the career that I want.

Medical school: University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota

Internal medicine residency: University of Nebraska Medical Center, Omaha, Nebraska

Gehan Botrus, M.B., Ch.B., Ph.D.

Gehan Botrus, M.B., Ch.B., Ph.D.

Why did you choose Mayo Clinic and the oncology/hematology field?

As a previous oncologist by training in Cairo, Egypt, I found Mayo Clinic in Arizona to be familiar and close to home with the beautiful sun 12 months a year, and amazing mentors to help you succeed. Oncology is an intellectual field and Mayo Clinic is pioneer in the field with cutting edge technology, excellent patient care, and extensive research. My interest is purely academia and I strongly believe this program will help me achieve all my goals.

Medical school: Cairo University, Kasr El Aini Hospital, Cairo, Egypt

Internal medicine residency: Texas Tech Health Science Center, El Paso, Texas

Shannon Fortin Ensign, M.D., Ph.D.

Shannon Fortin Ensign, M.D., Ph.D.

What attracted you to the field of hematology/oncology, and what are your future career plans?

I've always had an affinity for understanding cell biology and found the complex deregulated process of tumor growth and evolution to be a particularly interesting. I completed my PhD in cancer biology to better understand the mechanisms cancer cells use to acquire malignant potential, and developed a propensity for translating these studies into meaningful clinical value which ultimately shaped my decision to pursue clinical oncology. I intend to remain with an academic focus, and working to both advance our understanding of cancer genomics while applying research and new information to better treat patients.

Medical school: University of Arizona College of Medicine, Phoenix, Arizona

Internal medicine residency: Scripps Clinic/Scripps Green Hospital, La Jolla, California

Charles Gaulin, M.B.B.S.

Charles Gaulin, M.B.B.S.

What attracted you to the field of hematology and medical oncology?

Being involved in the longitudinal care of patients and having the capacity to improve well-being drew me to the field of hematology and medical oncology. Throughout my training, I came to appreciate the role that quality of life often plays in driving shared decision making. Prior experiences have since established quality of life as part of my professional identity. It is through impacting a cancer patient’s well-being that I regenerate my professional drive. I found Mayo’s core values to be consistent with my own and this program allows me to truly provide patient-centered care in an academic setting.

Medical school: University of Sydney School of Medicine, Sydney, Australia

Internal medicine residency: Mount Sinai Morningside and Mount Sinai West, New York, New York

Thomas Oliver, D.O.

Thomas Oliver, D.O.

What are your future career plans?

I am interested in gastrointestinal malignancies. I am also focused on the way we can utilize technology to provide comprehensive cancer care to lower the financial burden of cancer care and reach underserved communities.

Medical school: Lake Erie College of Osteopathic Medicine, Erie, Pennsylvania

Internal medicine residency: Main Line Health – Lankenau Medical Center, Wynnewood, Pennsylvania

Chief resident: Main Line Health – Lankenau Medical Center, Wynnewood, Pennsylvania

Miguel Gonzalez Velez, M.D.

Miguel Gonzalez Velez, M.D.

When selecting your career path, how did you come to decide on hematology-oncology?

Multiple reasons lead me to a career in hematology-oncology. This is a very exciting field at the moment, where I am able to take care of complex patients as part of an interdisciplinary team. Every week, I am privileged to participate in tumor boards where we reach the best treatment decision based on individual clinical presentation. My field also allows me to develop a long-term relationship through frequent follow-up with patients and families. It is not uncommon in hematology-oncology to develop very deep human connections with patients, as we usually are confronted with life and death discussions.

Medical school: CES University, Medellin, Colombia, South America

Internal medicine residency: Rutgers-New Jersey Medical, Newark, New Jersey


Erin Wiedmeier-Nutor, M.D., M.P.H.

Erin Wiedmeier-Nutor, M.D., M.P.H.

What attracted you to hematology/oncology and what makes this program unique?

Before I started medical school I read the book, Emperor of All Maladies, about the history of cancer treatment and research; from that point on I was ‘hooked’ on the science behind cancer and how to treat it. The hematology/oncology department at Mayo Clinic Arizona is unique because of its focus and priority on patient-centered care, emphasis on education and teaching, as well as cutting edge research. Cancer research is particularly important to me and I was pleased to be selected into the Mayo Clinic Clinicians Investigator Program, which helps support and train fellows interested in pursuing a career that includes a combination of clinical specialty and research.

Medical school: Oregon Health and Sciences University, Portland, Oregon

Internal medicine residency: Mayo Clinic in Phoenix, Arizona


The most important indicator of the success of a training program is found in the outcomes of the graduates upon completion of their training. 

Here's a look at what our recent graduates have gone on to accomplish.

NameProgram yearsDestination

Krisstina Gowin


University of Arizona, Tucson, Arizona

Brenda Ernst


Mayo Clinic, Phoenix, Arizona

Chad Cherington


Ironwood Cancer & Research Centers, Mesa, Arizona

Debra Wong


Director of Employer Strategy, Access Hope. Assistant Clinical Professor, Department of Medical Oncology & Therapeutics Research at City of Hope, Phoenix, Arizona

Leslie Padrnos


Mayo Clinic, Phoenix, Arizona

Chelsea Gawryletz


Sisters of Charity of Leavenworth Health, Front Range Oncology Group, Denver, Colorado

Tania Jain


Director, Adult Chimeric Antigen Receptor T Cell Therapy Program for Hematological Malignancies, Johns Hopkins Sidney Kimmel Comprehensive Cancer Center, Baltimore Maryland

Thomas DeLeon


Kaiser Permanente, Maui, Hawaii

Mohamad Bassam Sonbol


Mayo Clinic, Phoenix, Arizona

Talal Hilal


University of Mississippi, Oxford, Mississippi

Luke Mountjoy


Colorado Blood Cancer Institute, Denver, Colorado

Graduation of Mayo Clinic residents and fellows

Mayo Clinic Alumni Association

The Mayo Clinic Alumni Association will help you stay in touch with your Mayo Clinic colleagues, maintain a valuable professional connection to Mayo Clinic throughout your medical and/or research career, participate in continuing medical education, and more.

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