A leaking faucet is a very simple task for any plumber who is good at what he does and actually has a diploma in this domain. Although you don’t need a professional course to be able to fix your own leaking faucet, it’s better to leave this task down to professional plumbers because you might end up doing more damage to your sink than you might think.
A good step in finding a good plumber is to avoid those people who “sometimes” work as plumbers and they are usually called “handymen”. If they are not qualified for this job, it’s very likely that they are going to do as much damage as you would because there are a few details that only a professional plumber is aware about and takes into consideration before jumping into the act of repairing the leaking faucet directly.
At the same time, you should also avoid the “friends” of some of your neighbours who also work part-time as plumbers because this kind of work needs intensive preparing and training in order to become a good professional otherwise there is no difference between someone who reads the instructions over the Internet and someone who actually knows the details regarding the construction of the faucet, the pipes and all the other elements which are connected to each other and that influence the good working of your faucet in the first place.
Hiring a plumber through a newspaper ad might be a risky thing to do but the minute he walks to your front door you need to ask him for his identification tag in order to check if he really is a plumber. However, the best way is to find a plumbing company with a great reputation and hire one of the technicians that work there based on his experience and qualification.