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With over two decades of leadership experience in biopharma corporate strategy & business development, late-stage development, and operational execution, Mr. Soffer has held executive roles across public and private biotech companies, overseeing drug development, manufacturing, business development, finance, and corporate strategy. Prior to joining LB Pharmaceuticals, Mr. Soffer served as Chief Operating Officer at Rheos Medicines, where he led corporate strategy, finance, and business development efforts, securing a $700 million strategic collaboration with Roche. He previously served as Chief Strategy Officer and Chief Operating Officer at Atara Biotherapeutics, where he helped scale the company from a four-person startup to a 300-person publicly traded leader in allogeneic T-cell immunotherapy. Earlier in his career, he held roles at Celgene, where he led numerous business development transactions as well as global development for Abraxane, and in biotech-focused investment and consulting roles. Mr. Soffer also currently serves on the Board of Directors of General Metabolics, a leading metabolomics service provider.