Close, distance, color, and depth vision, manual dexterity (to handle small objects, instruments, or gages), ability to adjust focus, work from a ladder or lift occasionally, safely lift 20 pounds, walk on uneven ground or terrain, work in confined spaces, crawl for extended periods of time, enter 24 inch diameter space, hear, work outside (including inclement weather), wear a respirator, speak and smell. Duties vary by project assignment; examples include assisting with field inspections and demonstrations, proof of concept testing, research/literature reviews, data entry/analysis, development of presentations, specification writing, design of prototype devis, and project management/oversight.