Thomas now is one of three female officials in Conference USA, and she hasn't had much trouble with acceptance. She's tried to surround herself with the people who helped her break into the business, and that has helped combat any negativity.
"When you get into this business, it's truly a fraternity, and they just so happened to let me in, I guess," she said.
Now she's on the verge of joining an even more exclusive club in the NFL.
Experiences like this week's mini-camp are good because they allow Thomas to get a close-up view at the game's highest level. She said most of the feedback she got from the Colts was positive, and she's just trying to keep moving forward.
Like many rookies, she's noticed a difference in the speed of the NFL game. But like nearly every other challenge she's faced along the way, Thomas is taking this one head on.
"The game has a tendency to slow down the more snaps you get and repetition," she said. "So, hopefully, after more snaps I get, things will start slowing down a bit."