This is skilled, advanced technical work in engineering specialties of a sub-professional level. Employees in this class perform difficult technical duties in field and office engineering specialties, which include surveying, inspecting, drafting and elementary designing assignments. Work may involve the coordination of a small group of unskilled and semi-skilled non-professional engineering personnel in the performance of moderately difficult tasks. Assignments are received through oral instructions, survey notes, sketches, maps or detailed work plans. Work is checked during process and reviewed upon completion by professional superiors.