Dr. O’Neil was born in Hinesville, Georgia, and grew up in Binghamton, New York. While attending Hobart College in upstate New York, he received his B.S. in Biology. He attended medical school at the Albany Medical College in Albany, New York and completed his residency in obstetrics and gynecology at the Stamford Hospital in Stamford, Connecticut, and has been in private practice in Irving since 1997 and at MacArthur OB/GYN since 2011. Dr. O’Neil is one of the first physicians in the U.S. to become board-certified in Female Pelvic Medicine and Reconstructive Surgery having done so in 2013. He has also been board certified in general Obstetrics and Gynecology.