From the bottom up┬áTesco Corporation says that it has ÔÇ£better ways to the bottomÔÇØÔÇöthe bottom of an oil well, that is. Now at the bottom of a recession, it is doing what a sustainable business should and taking steps to ensure it comes out on top, as John OÔÇÖHanlon reports. TESCO was founded more than 22 years ago in Calgary, Alberta, where it now maintains its production facility, though its headquarters are now in Houston, Texas.