NBCUniversal CEO Jeff Shell is leaving his position, effective immediately, after an internal investigation into his professional conduct. Summary NBCUniversal CEO Jeff Shell is leaving his position, effective immediately, after an internal investigation into his professional conduct. Shell acknowledged in a statement that he “had an inappropriate relationship with a woman in the company, which I deeply regret.” The media executive continued, ““I’m truly sorry I let my Comcast and NBCUniversal colleagues down, they are the most talented people in …