Githyanki Diaspora has an interesting interview with Jim DelRosso about Unknown Armies, in which Jim mentions that he substituted Michael Jordan for Alex Abel as the person behind the New Inquisition:
Basically, Alex Abel is set up in the text to be a popular figure in the mainstream consciousness; the “reveal” that he’s running TNI is supposed to be a surprise. But it doesn’t work in a game because he doesn’t exist outside of UA’s fiction: he exists only to run TNI. Getting players to be surprised by that fact is like getting them to be surprised that billionaire playboy Bruce Wayne is actually Batman. You’d either have to try to subtly introduce him to the narrative over time, or just ask them to pretend to be amazed. Neither seems fun.
So I went looking for a different Alex Abel.
Scroll down about halfway to the section on how Jordan became the man who decided “to just beat on the pinata of the occult until answers fall out,” which includes a timeline of Jordan’s meteoric success and sometimes curious career changes over the 1990s and 2000s, and how they make sense within the context of Alex Abel’s aborted ascension to the Invisible Clergy and his burning need to discover what he unknowingly lost that day. It really is spectacular, and just the kind of backfilled secret history that makes Unknown Armies the role-playing game of Tim Powers novels.