The Accelerator Systems Division (ASD) provides best-in-class operation, maintenance and upgrade of the Advanced Photon Source accelerators and support users in doing outstanding science in a safe environment. The Radiofrequency Group of ASD is searching for a Radiofrequency Engineer. Responsibilities will include: Design, develop, construct, implement and maintain high-power rf systems for particle accelerator applications utilizing solid-state rf amplifier devices for power generation in the