Five years ago, global oil services giant Schlumberger employed 123,000 people across the globe. These days, even as the global industry is pumping record amounts of oil and gas, Schlumberger continues to shed staff. The company’s current headcount is less than 100,000 and falling. Blame goes to a surge in oil exploration automation. Reduced demand for the oil industry “roughnecks” and other contractors that work for oil services firms like Schlumberger is hitting the bottom line.