This is Sorenson, Shift 2! Kaleb, what's going on?! Dead bodies are chasing us! Dead bodies I recognize! It's fucking Shift 4!

Sorenson was a C.E.C. worker and was part of Shift 2 on the Sprawl. Along with the survivors from his shift, Ellie and Kaleb, he was trying to escape the Sprawl. What happened to him was ultimately unknown, although the fact that he failed to escape Titan Station before it was destroyed at the end of Dead Space 2 certainly suggested death, regardless of whether it was a Necromorph or the explosion itself.