Tax model validation specialistExperis is the global leader in professional resourcing and project-based workforce solutions.Overview of contractOn behalf of our client, a large bank in Switzerland, we are looking for a Tax model validation specialist.Required Skills & ExperienceIn-depth expertise in U.S. withholding tax regulations, specifically Section 871(m).Strong knowledge of equity derivatives (options, swaps, structured notes) and their risk/return profiles.Proficiency in derivatives modelling and calculation of Greeks.Experience in model validation within a financial institution or consultancy.Strong quantitative and analytical skills, with proven ability to challenge and refine model assumptions.Familiarity with compliance frameworks, product governance, and regulatory reporting.Excellent communication skills, with the ability to explain complex quantitative and regulatory concepts to non-specialists.