Chelsea Plummer, PhD is a Senior Product Marketing Manager with a background in bioanalytical mass spectrometry. Graduating from Purdue University and The University of Alabama, her research focused on analysis of small molecules and peptides by both quantitative and high resolution MS. At Waters, Chelsea has supported customers across product specialist roles in both consumables and mass spectrometry. Later moving to Waters’ product team, she now covers sample preparation, particularly focused on solid-phase extraction products for use in bioanalysis, food, and environmental applications. Chelsea enjoys working closely with the scientific team at Waters to provide customers with helpful sample preparation solutions.

Stuart Oehrle is a senior field chemist with 30 years of tenure at Waters. In addition, he is an adjunct instructor for 25+ years at Northern Kentucky University, teaching such classes as freshman chemistry lab and instrumental analysis lab. Stuart obtained his chemistry degree from Northern Kentucky University and did his graduate work at the University of Alabama-Huntsville and University of Cincinnati. Stuart’s primary area of focus is in the development and application of LC and LC-MS/MS. He has been involved in a wide variety of research projects including extensive work in the identification and analysis of toxins from cyanobacteria using LC and LC-MS/MS as well as the development of the Porapak RDX solid phase extraction cartridge for groundwater analysis of explosives, and the use of LC-MS/MS for the analysis of chemical warfare agents to name a few. He has published or presented over 80 papers during his tenure as well as been awarded several patents.