Welds can be inspected by either destructive and non destructive methods. Radiograph, visual and UT are methods of non destructive testing. Cutting coupons and bend them is a method of destructive testing.
NDT can be used in other industries besides welding.
WT may be the only company in Phoenix that does contract inspection, but almost any large fabrication or steel erection company will have at least one CWI. Also as you are military Weston Solutions in San Antonio and Cape Environmental in Atlanta use a lot of CWI's on their projects on bases and military facilities. KBR may have some, but they generally sub that out to smaller firms.