Kforce's client, a growing and established engineering technology company is seeking Senior or Principal Signal & Power Integrity Engineers in Chandler, AZ. Summary: We are working directly with the Hiring Manager on this search assignment. We have been working with this client for several years and have made numerous placements. We are seeking someone with a strong experience in signal and power integrity related to semiconductor IC package design or similar. This position is hybrid remote. Responsibilities: * As a Senior & Principal Signal & Power Integrity Engineer (SI/PI), you will work with IC package design engineers to provide design solutions for high-speed and low speed signals, clocks, power delivery signals, and power and ground planes * Provide routing guidelines for high-speed, low-speed, power signals, power, and ground planes from bumps to balls * Work directly with our customers, package design engineers, simulation engineers, business units, R&D, and assembly * Provide package layer counts, stack ups, materials, impedance control, test impedance targets, and optimizing net assignments for signals * Senior or Principal SI/PI Engineers will perform SIPI simulation/optimization to make sure critical signals meet their required specifications * Signal integrity analysis of frequency and time domain simulations for high-speed signals and low speed signals following specifications * Optimize single ended or differential Insertion loss, return loss, X-talk, and power sum X-talk for differential signaling groups and protocols * IR_DROP simulation for the power rails from bumps to balls * AC frequency sweep simulation to optimize the high RLC traces to the lower by achieving low resistance and inductance traces * Power plane resonance to measure the resonances of the package plans * PDN frequency domain and transient time domain analyses