Yes, there is. I can't remember if it's straight ahead when you come through security in terminal #1 or when you reach the second floor after riding the escalator up to Concourse C. There's also one in baggage claim to the right of the security exit when you come up the escalator and walk out the security exit.

If memory serves:

Terminal #1, B concourse directly ahead when exiting security from the priority security lane that's across from the last curbside drop off . I think there are Bank of America and Harris Bank ATMs side by side.

C concourse directly ahead when you reach the top of the underground escalators into terminal C. This may only be a Harris Bank ATM. Come to think of it, I think I've seen a Bank of America ATM in this concourse.

Baggage claim to the right after exiting security after the ride up the escalator from the concourse B/C underground area.