Pioneer Natural Resources Co. , the largest oil producer in the Permian Basin, is requiring new hires to be vaccinated against Covid-19 as inoculation and mask mandates proliferate across the economy. Amid surging caseloads that are stressing medical facilities in West Texas, Pioneer also is offering employees a one-time vaccine incentive of $1,000, the company said in an email. Devon Energy Corp. is offering $500 to workers that show proof they took the jab by Oct. 15. Meanwhile, Occidental Petroleum Corp. is extending a work-from-home option for some office staff through the end of October, and taking steps to prevent viral spread on offshore platforms. Valero Energy Corp. , the second-biggest U.S. fuel maker, is compelling new hires at some refineries to get vaccinated. None of the country’s top shale drillers have implemented across-the-board vaccine mandates but the requirements for new hires and cash incentives show the level of […]