I am a Professor in the Department of Urology at Northwestern University, Feinberg School of Medicine with a clinical and research focus on male reproductive medicine and surgery. I obtained undergraduate and medical degrees from Northwestern University. After completing residency training in Urology at Northwestern, I entered a fellowship in Male Reproductive Medicine and Surgery at Baylor College of Medicine. I returned to join the Faculty at Northwestern in 1999 where I am a Professor and Director of the Andrology Fellowship. Over half of my prior fellows now hold faculty positions at academic medical centers. Within Northwestern University, Feinberg School of Medicine, I serve as the Assistant Director of Student Affairs in the Augusta Webster Office of Medical Education.

I have been actively involved in the leadership of many national organizations and societies. I am a Past President of the Society for Male Reproduction and Urology (SMRU) and also a Past President of the Society for the Study of Male Reproduction (SSMR). I serve on the Examination Committee for the American Board of Urology and the Core Curriculum Committee for the American Urological Association. I was recently elected to a three-year term on the Board of Directors for the American Society for Reproductive Medicine. I am an Editorial Editor for the journal Fertility and Sterility, and an Assistant Editor for The Journal of Urology. I am an ad hoc reviewer for numerous other peer-reviewed journals.

My clinical concentration is male reproductive medicine and surgery. My surgical interests include performing: microsurgical vasectomy reversal; microsurgical varicocelectomy; micro-TESE for sperm extraction; and vasectomy. I treat hypogonadism (low testosterone) in males, including hypogonadism associated with aging and congenital causes such as Klinefelter's syndrome. My primary research focuses on fertility preservation (oncofertility) in adolescent and adult male patients with cancer.