I don't know much about tenure and tier one, but I have confidence in UC's IT program to get you places. The IT program is rigorous now, unlike two years ago, when I started. I applied for both South Dakota and UC, and out of gut/basic research and analysis, I decided to go with UC. While I can argue that UC won't get you what you want as far as being a professor at tier-one school, I guarantee that the IT information security systems Ph.D. concentration is legit, rigorous, and reputable. I just started the 16 month Journey, and I like weekly zoom meetings with my advisor and professors as they guide me on how to craft all the dissertation chapters efficiently and effectively. Finishing 16 classes take a toll, but once they are out the window, the dissertation journey is fulfilling. I believe with hard work, connections, and other strategies (including re-invented you) can reach that goal with Ph.D. from either school. Good luck!