Saleem Igor Ulman was the leader of a terrorist organization based in Somalia who was responsible for capturing and imprisoning former NCIS Liaison Officer to Mossad, Ziva David who he held hostage several months in North Africa while also torturing her so that he could obtain information on NCIS, presumably so that he and his men could launch a potential attack against the agency.
Ulman's origins are unknown and his formative years are completely shrouded in mystery. He spent several years in the United States, and earned a Bachelor of Science degree from Yale University.
During this period he developed an addiction to caffeine, which he indulged by drinking copious amounts of Caf-Pow (his fondness for the beverage would later prove to be his undoing, as NCIS was able to pinpoint the location of his camp by tracking shipments of his Caf-Pow deliveries much to Saleem's own anger). He also seemed to have a fondness for American football, as he defended Yale's collegiate record against Anthony DiNozzo's derision.
At some point after completing his studies he founded a terrorist group that eventually expanded to include a sleeper cell located in Los Angeles.
Both NCIS and Mossad although applying different methods managed to visually weaken and eventually dismantle the structure of the terrorist cell with the members of the cell dying at the hands of Mossad agent Michael Rivkin and the remaining members all dying in a gunfight against members of the NCIS Office of Special Projects Team except for Haziq Khaleel who was later captured and subsequently interrogated.
After learning of the cell's destruction, Saleem was consumed with a strong desire for revenge and sought to exact vengeance on those responsible.
NCIS Season 6
Saleem made his debut appearance in the Season 6 finale episode, Aliyah (episode) where he was seen talking to a captive and demanding that they tell him everything they knew about NCIS with the captive revealed as being none other than former NCIS/Mossad Liaison Officer Ziva David.
NCIS Season 7
During his interrogation, Ulman beat McGee to the point of unconscious before injecting Tony with a truth serum and was soon convinced that DiNozzo and McGee were acting independently of NCIS (which was semi-accurate), and lowered his guard, believing that his base was not about to be attacked by U.S. forces.
This was a mistake; on the pretext of telling him something important, Tony lured Ulman near a window, where he was killed by Leroy Jethro Gibbs, a former Marine sniper, who had been lying in wait on a hill and was using a sniper's rifle. A short time later, the base came under attack, allowing DiNozzo and McGee to escape with Ziva where they met up with Gibbs and all four later escaped back to America.
It is not known what became of Saleem's remains but they were presumably either buried in an unmarked grave or cremated.
Saleem was a short man in his thirties with shortened black/brown hair and brown eyes. He also wore a mustache and had some scruff on his lower face.
Hand to Hand Combat
Saleem left a rather long-lasting yet very negative impression on NCIS and its colleagues as the NCIS team regarded him with disgust when they spoke about him.
In Reunion (episode), Vance mentioned to Gibbs that Saleem's men had put a world of hurt on Ziva and later in The Inside Man (episode), Ducky voiced his belief that the torture Ziva had endured during her captivity was far worse then they had all originally thought.