The Data Center Technician II role at Google involves installing, configuring, testing, troubleshooting, and maintaining hardware (servers and components) and server software (Google's Linux cluster). Responsibilities include configuring network components (routers, switches, etc.), participating in projects, developing contingency plans, and performing manual installation of racks. Troubleshooting and resolving equipment or infrastructure issues, maintaining data security, disassembling end-of-life equipment, and performing preventative maintenance are also key responsibilities. The role requires physical stamina and the ability to work non-standard hours.