A Cisco ACI job involves managing and configuring Cisco's Application Centric Infrastructure (ACI), which is a software-defined networking (SDN) solution for data centers. Professionals in this role design, deploy, and troubleshoot ACI fabric to optimize network performance, security, and automation. Typical responsibilities include integrating ACI with virtualization technologies, monitoring network policies, and ensuring seamless application connectivity. Strong knowledge of networking protocols, automation tools, and Cisco ACI components like APIC, spine-leaf architecture, and contracts is essential.