Bruce Berkoff is one of that rare breed of scientist marketers who enjoys the discovery almost as much as he enjoys telling people about it. And as CMO of Lightsense Technology, his job is to spread the word about the crowdfund for his company's miniature, handheld spectrometer platforms that are helping solve some major problems in public health, including detecting opioids, viral pathogens, and bacterial pathogens. We talk about his extensive expertise in physics, biophysics, and business development, raising his kids in Korea, and the mud puddle that sent him westward.