MTB, gravel, and road riding labbie here.
There are some ok rides in the area, Brushy and Del Valle are doable at lunch, P-Ridge and Morgen territory also have some decent stuff for the post-work hours. If you're into road, the lab has a lunch ride that goes off every day at 11:30. There is an A/B split, and there will be close to 20 riders showing up at the start. A group is solidly fast, B group picks up the folks who get spit out the back of the A's. There are a few of us that take the MTBs or gravel bikes out and hit brushy or sycamore just to get off the pavement for a bit. If you end up taking the job, PM me and I'll shoot you some ride beta, and the lunch ride group info.
JP