[1][3] In August 2011, Okun was appointed as a senior lecturer in the Faculty of Life Sciences at Bar-Ilan University.

His research, at the Gonda Multidisciplinary Brain Research Center, focuses on Alzheimer's disease, and how cells of the immune system communicate with the brain during aging, in people with Alzheimer's disease, and individuals with Down syndrome.

Another research focus is the connection between pregnancy with a Down syndrome fetus and the increased risk of cognitive decline in the mother.

[1] On 7 October 2023, with the start of the Hamas-led attack on Israel at 6:30 AM, Sarit and the children took shelter in their home's safe room, while Eitan, as part of the kibbutz's emergency response team, went out to combat the dozens of militants who had infiltrated the area of the kibbutz and its surroundings.

Only after five hours of fighting did a reinforcement team from the Masada unit arrive, followed by forces from Yahalom and the Paratroopers Brigade.