We are LOTTE BIOLOGICS ! Delivering Therapies That Enable a Healthier World . A new company, built on 80 years of tradition. We embody our core values of being Inspired by Science , Embracing Diversity , Fostering Talent , and Connecting Lives . Our mission is to be the most trusted partner in the industry, with high standards of quality and continuous innovation, to reliably deliver benefits for patients worldwide. Position Summary The Purification Development Principal Scientist, Process Development will report into the Development organization. The primary role of the Principal Scientist is to lead the design and execution of lab scale experiments in the development, optimization and scale-up of downstream purification process including bioconjugation to support the client projects and process transfer to manufacturing. The ideal candidate will drive the bioconjugation and purification throughout the product life cycle and will require technical expertise in conjugation chemistry and downstream unit operations including tangential flow filtration, dead-end filtration, and protein chromatography. The successful candidate will lead the design and execution of laboratory experiments in the development, optimization, and characterization of product including ADCs. In addition, this role is expected to manage two to three direct reports, work effectively in a highly collaborative team environment, and communicate proactively and efficiently with cross-functional departments.