Prior to joining the NIH in 2001, he served on the faculty of the University of Michigan Medical School as the Paul R. Lichter Professor of Ophthalmic Genetics.
[6] He maintains a small clinical practice at NEI for patients with these and other genetic retinal diseases, including Stargardt juvenile macular degeneration.
[1] Sieving established the NEI Audacious Goals Initiative (AGI) for Regenerative Medicine, a major program to develop treatments for eye diseases.
[7] The AGI is a strategic research effort to restore function of critical nerve cells in the eye and visual system even after they are damaged by disease.
He then did a clinical fellowship in genetic retinal degenerations with Eliot Berson in 1984–85 at Harvard Medical School, Massachusetts Eye and Ear Infirmary.