Amazon CEO Andy Jassy elevated two AWS executives in a move that underscores the cloud unit’s centrality to the company’s future. Prasad Kalyanaraman, vice president of AWS Infrastructure Services, joined the elite S-team. Dave Brown advanced to senior vice president, overseeing compute and machine learning services. The changes, announced in an internal memo, restore the S-team to 28 members after recent exits. GeekWire first reported the shifts. Kalyanaraman brings over two decades at Amazon. He started in fulfillment and supply chain operations. In 2012, he shifted to AWS. Today, he manages data centers, networking, and supply chain—backbone elements for AWS’s global reach. Jassy praised his “customer obsession, high standards, ability to be right often, delivery, and missionary approach.” That last bit? Always focusing on what’s best for customers—and the company as a whole, not just his corner. And the timing matters. AWS faces exploding demand from AI workloads.…