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John Tomasello is an accomplished human resources executive with extensive experience in various leadership roles. Currently serving as EVP & Chief Human Resources Officer at Messer Americas, John has previously held positions such as SVP & Chief Human Resources Officer at Stemline Therapeutics and multiple VP roles at LEO Pharma, where responsibilities included HR for North America and Global Commercial Business Partnering. Prior positions also include VP of HR at Mallinckrodt Pharmaceuticals, overseeing Global Rare Disease and Global Operations, and Senior Director of HR at Baxter International Inc., focusing on Global BioScience and Program Leadership. John holds a Master's degree in Human Resources from Rutgers University and completed further education at Cornell University.