Enlarge (credit: Jaroslaw Kilian | iStock Editorial / Getty Images Plus) Amazon may be forced to meet some unionized delivery drivers at the bargaining table after a regional National Labor Relations Board (NLRB) director determined Thursday that Amazon is a joint employer of contractors hired to ensure the e-commerce giant delivers its packages when promised. This seems like a potentially big loss for Amazon, which had long argued that delivery service partners (DSPs) exclusively employed the delivery drivers, not Amazon.