Little is known about Saul's early life yet, it has been established he majored in political science in college. He was also one of the few Jewish children to grow up in a town in rural Indiana.
Background
Saul has worked for the CIA for 35 years. He recruited, trained, and placed Carrie in the field, and continues to have a close working relationship with her, despite not being her immediate boss anymore. He was responsible for catching Osama Bin Laden
Nick Brody's return
Carrie told Saul about the intel Hasan Ibrahim supplied regarding a turned American POW and requested permission to place surveillance on Sgt. Nick Brody, a POW who was recently rescued after long captivity. Saul denied the request, suggesting that her idea that Abu Nazir tipped off the military to the location where Brody was found was fanciful, and would need real evidence to justify action against Brody.
He did however place her in Brody's debriefing on the condition that she behave herself (which she didn't). Saul defends her against her boss, David Estes, who complained about her behavior in the debriefing, however he was warned not to let things get personal with Carrie. Saul discovered Carrie's illegal surveillance of Brody and became angry with her when she later attempted to seduce Brody. Saul does feel that Carrie justified herself when she found a rhythmic pattern in the way Brody tapped his fingers during televised appearances.