You will validate & characterize wireless system performance across cellular technologies towards industry conformance, regulatory compliance, carrier & use case requirements. You will perform failure analysis of issues with cross-functional engineering teams and drive issues to closure. You will be responsible to complete certification testing. Examples of activities you may be involved in are:•Bringing-up device-under-test and setups for validation preparedness.•Defining test requirements & design, implementing in-house test systems, and executing validation & characterization test plans to meet industry, emissions and performance requirements. •Tracking validation status, analyze results, communicate issues & insights from data.•Performing failure analysis to understand low margin or failing behaviors making use of experimental SW/FW and mock-up hardware.•Collaborating with test equipment vendors, technology suppliers and cross-functional staff to optimize RF parametric performance.•Supporting testing at contact manufacturing sites and supporting certification of Apple products.