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Jes Alexander, MD, PhD

Acting Instructor

Locations of Practice


Dr. Alexander is a radiation oncologist working clinically at the SCCA Proton Therapy and as a researcher at the Fred Hutchinson Cancer Research Center (FHCRC) in the Solid Tumor Translational Research Group where he is studying mouse models of brain tumors to better understand and find treatments for brain tumors in patients.

Patient Care Philosophy

The doctor-patient relationship is based on communication and responsibility.  I listen to my patients and do my very best to address their concerns and achieve their goals.  My goal as a physician is to give my patients the right treatment for their disease, regardless of what it takes to accomplish this.

Education and Training

College: B.S. with Honors in Biology and Chemistry, Stanford University, Palo Atlo, CA, 2000

Graduate School: Ph.D. in Biology, Massachusetts Institute of Technology (MIT), Boston, MA, 2008

Medical Education: Duke University School of Medicine, Durham, NC, 2009

Internship: Internal Medicine: St. Mary’s Medical Center San Francisco, San Francisco, CA, 2010

Residency: Radiation Oncology, University of California, San Francisco (UCSF), San Francisco, CA, 2014

Published Works

Alexander J, Weinberg V, Gottschalk AR, Hsu IC, Shinohara K, Roach M 3rd. Pre-plan parameters predict post-implant D90 ≥ 140 Gy for 125I permanent prostate implants. J Contemp Brachytherapy. 2014 Jun;6(2):143-53. doi: 10.5114/jcb.2014.43248. Epub 2014 Jun 3. PMID: 25097554.

Alexander J, Lim D, Joughin BA, Hegemann B, Hutchins JR, Ehrenberger T, Ivins F, Sessa F, Hudecz O, Nigg EA, Fry AM, Musacchio A, Stukenberg PT, Mechtler K, Peters JM, Smerdon SJ, Yaffe MB. Spatial exclusivity combined with positive and negative selection of phosphorylation motifs is the basis for context-dependent mitotic signaling. Sci. Signal. 2011. 4:ra42.

Mazanka E, Alexander J, Yeh BJ, Charoenpong P, Lowery DM, Yaffe MB, Weiss EL. The NDR/LATS Family Kinase Cbk1 Directly Controls Transcriptional Asymmetry. PLoS Biol. 2008. 6:1778-1790.

Board Certification

Board Eligible – American Board of Radiology