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Callahan Lieb is a Senior Project Manager at Sutter Health since September 2022, with extensive experience in project management and construction. Previously, Callahan served as an Estimator and Pre-Construction Project Manager at Herrero Builders, contributing to significant projects such as the UCSF New Hospital at Parnassus Campus, valued at over $4.5 billion, and leading The Hamlin School project in San Francisco, a $50 million development. Callahan also held positions as Project Manager and Assistant Project Manager, leading various healthcare renovation projects. Earlier experience includes roles as a Project Engineer for the CPMC Van Ness Campus Hospital and internships with several construction firms. Callahan earned a Bachelor of Science in Engineering with a focus on Structural Engineering from California Polytechnic State University-San Luis Obispo.