Municipalities: public works officials, construction and rehabilitation personnel, engineers, senior city staff and elected officials
Contractors: sewer, water, gas utility, industrial, pipeline, damage prevention and safety
Consulting Engineers: firms serving the underground infrastructure and industrial markets
Gas/Electric Utilities: officers, managers, construction, maintenance and rehabilitation personnel
Pipelines and Energy: officers, managers, construction and maintenance personnel for transmission pipeline construction, rehabilitation and maintenance
Industrial Facilities: construction and maintenance personnel, engineers and environmental assessment personnel
Damage Prevention: personnel involved in managing damage prevention and safety issues
