If you're an experienced professional or for those who have experience in a specific field, you then don't desire to register with any old recruitment agency, you wish to find one which will come up with the kind of positions that you'd be interested in, or else the only jobs you might be offered may simply be inappropriate for the skills and experience.
There are hundreds of specialist agencies on the market, most of which can be found on the internet. So if you are a marketing guru, somebody who is skilled in another of the many areas of construction, or you are a chef etc then don't get a recruitment agency that does 'everything' you need one which specialises in your field.
Basically homing in https://inspireselection.com/ when on the net, should enable you to locate the right sort of agency. In the event that you just enter recruitment agency, you should have literally a large number of options to search through, but if you enter 'Construction Recruitment Agency' then this can start to narrow your options down.
Basically though, a few of the search engine results could have 'keywords' attached to them, meaning that if the Webmaster for a site tags the site to be flagged up if 'construction' is typed in, then regardless of whether or not any construction jobs are on the website, the website will be high up in the search engine, therefore the more specific you may be when searching, then your better it is, so if you want a construction agency which could offer you a job as a Quantity Surveyor or a person who draws plans using CAD, then type in Quantity Surveyor or CAD designer as well recruitment agency which will soon begin to narrow down the search engine results. Therefore the more specific you could be, the better!