John‘s background is in the effects of natural and anthropogenic aerosols on climate, and has researched atmospheric events ranging from brown clouds in the tropics to ozone loss in the Arctic. He has extensive experience with aerosol characterization instruments, mass spectrometry, chemi-luminescece instruments, and pulsed laser systems. John joined nanoComposix in 2008 and has led projects that utilize metal nanoparticles as novel obscurants to block visible, near-IR, and mid-IR regions of the spectrum. He is also developed systems to transition the manufacturing of pyrophoric metal nanoparticles used for IR decoys from research scale to production scale. He is the author of 19 peer reviewed journal articles.