The only way to obtain a work visa is through a pre-existing work contract with an Argentine employer. It is illegal to enter into Argentina without a work visa and look for work or earn money. In practice, however, this illegality is rarely enforced and many expats (especially those who teach English at institutes) do work and earn their paychecks under the table. Formally, the process for getting a work visa must be initiated by the employer, and the employee must be in their home country for the visa application.
If you are wanting to come to Argentina to find a job first, and then intend on leaving before you relocate here, you’ll only need a tourist visa. Please see the section marked “Reconnaissance” for more information.
For more detailed information on the process of obtaining a work visa, please see the section “You have a job and need to relocate.”