Well not the rigger we will be talking about. When I first got my riggers license and people asked me what I do for work I would say "im a rigger" the next thing they would always ask is... whats that??? In construction riggers mostly put up structural steel which consists mostly of columns, beams, purlins and guying cables. They also put up and take down the tower cranes and hoists.
The picture on the left shows a rigger putting up a cable, it looks like he is doubling the cable back to the top, applying bulldog grips to the cable and using them to assist his climbing. Apart from being in black and white you can tell its an old photo due to the lax OH&S standards, you will notice he is not even wearing a hardhat or gloves which are pretty much mandatory on all sites these days.
A good proportion of riggers work in construction but others also work in the energy and telecommunications sector.
In Australia for someone to apply for a rigging license they must already have a dogmans license as a rigger will often have to direct a crane to get a piece of steel into the correct position with the crane before and during the installation process.
The main tools of the construction rigger are a good leather tool belt, podger, tape measure, level, rattle gun, cumber-long, chain block and a nice heavy hammer especially if you are working on the tower cranes and need to knock those big pins out.