The article captions a photo of him thus:
Aaron McLamb struggled with survivor’s guilt and couldn’t talk about what happened that day for 10 years.
I wonder if the inadequate help that Bethel offered traumatized people early on; and the way JWs were ecstatically hoping this tragedy was a springboard to the end, had anything to do with his survivors guilt, considering that he wasn't in any of the towers at the time. (Survivor's guilt usually affects those who were in the same immediate danger of death as those that died. He clearly wasn't)
Maybe it's not really survivor's guilt. Maybe he's just calling it that to avoid having to speak badly about how the JW organization crushed his dream to become a career firefighter, how Watchtower policies and practices prevented him from doing more to help others on that day. Maybe he doesn't want to make waves with JW family still in.