With over thirty office locations in over twenty countries, there may be opportunities to expand your skills and further your career in one of their other branches. Thoroughly explore the job expectations before your interview to determine whether travel is a job requirement. It is always best to be honest rather than set up false expectations. You want this job to be as much of a good fit for you as you are for them. So explore whether this is conducive to your goals. It is also acceptable to not close the door on this question and explain you'd like to explore this further before committing one way or the other.