R. Kenneth (Ken) Marcus is University Professor of Chemistry, starting his career at Clemson in 1986. Throughout his career, Marcus’ research group focus has been the development of novel chemical instrumentation. His current research program can be broken down to two, diverse fields of chemical analysis. In the first case, ionization sources based on microplasma technologies are being developed to deliver information on the elemental, isotopic, and molecular levels. The incredible versatility of the liquid sampling-atmospheric pressure glow discharge (LS-APGD) source is demonstrated through support of DTRA, NNSA, Oak Ridge National Laboratory, Merck Pharmaceuticals, Advion, the National Institute for Innovation in the Manufacture of Biopharmaceuticals (NIIMBL), and the Advance Mammalian Biomanufacturing Innovation Center (AMBIC). The second, diametrically opposite, focus is the use of capillary-channeled polymer fibers for the chemical separation of proteins. Here again, funding from diverse sources has included the National Science Foundation and Merck. Potentially most impactful has been a year-old collaboration with Dr. Terri Bruce (CLIF) using the fibers for the separation of exosomes; “the next big little thing.” Exosomes are integral components in intercellular communication, and thus the spread of disease, as well as potentially powerful biomarkers for clinical diagnosis and as biotherapeutic drug delivery vehicles. The same platform is also being developed for the purification of viruses which are important as well in clinical diagnosis and in the production of biotherapeutics. Marcus has been recognized through numerous awards at both the University, state, national, and international levels. He is a Fellow of four learned societies, the Royal Society of Chemistry (London), the American Association for the Advancement of Science, the Society for Applied Spectroscopy, and the National Academy of Inventors. He serves on the advisory boards of three international journals.