Plenty of good companies in town (and a few to steer clear of).
Aaron Stuart installed the system at my previous house (new house came with one), and I was very pleased. He also handled maintenance over the years. (979) 587-1844.
Larry Whitfield @ Rain Tec is another good one 979.696.9345
Phil Hathaway @ IDC (979) 218-2219 is yet another good contact.
Phil Hathaway moved away. There is a company that took over his client base. Email me at jnations at cstx dot gov and I'll send you a list of licensed irrigators (all irrigators mentioned this far on this thread plus others).
I did a search on here for sprinkler system repair and decided to give Aaron Stuart a call after seeing these recommendations. I just wanted to say how awesome he and his crew were. He was very prompt in getting out here and did an awesome job diagnosing and fixing our issues. His pricing is also really reasonable. I just wanted to give him a thumbs up and say that I will be using him from now on!