The 30th CIRP Life Cycle Engineering (LCE) Conference was hosted by Rutgers University-New Brunswick from May 15-17, 2023. The conference has received 203 abstracts and 157 paper submissions. Four keynotes and 124 paper presentations from more than 20 countries were given on diverse topics from sustainable design, sustainable manufacturing, circular economy, and life cycle assessment, to smart manufacturing and Industry 4.0. A tour of the New Jersey Advanced Manufacturing Institute (NJAMI) was given as part of the Banquet program. https://lce2023.rutgers.edu/