The Rigger must have knowledge of complex rigging, heavy rigging, change crane boom and cable, electrical safety, ladder and scaffold safety, introduction to lifting machinery, wire rope basics, basic rigging, fire prevention, sizing of chokers, load charts, cutting torches, and basic knowledge of blueprint reading. Physical: While performing the essential functions of this job, the employee may be required to: Move throughout active construction and project site environments, including areas with uneven terrain, mud, gravel, sand, and other varying surface conditions.