I am a pilot and have worked with the 2 people mentioned in the ad many MANY moons ago in a different survey company. I don't know much about this company (GPX), but as the most important thing about small (and big) companies) are THE PEOPLE, i can assure you that they are both absolutely top notch specimens, as good as they come!!
Heck, it almost makes me wanna go back to the survey industry, ehh well - maybe not quite - but if you enjoy traveling and don't have too many family commitments, the survey industry offers a rewarding career. And Snow-Bob and Kathy will look after ya!!
Cheers.