Since 1990 Aconcagua Park has had a park ranger service which controls the protected area and helps the visiting climbers. This service is present in all the base camps and often in the ascent routes.

It is in charge of:
Keeping the order
Checking cleanliness
Controlling the camps
helping and informing climbers
Controlling the service providers (in case of problems or complaints report immediately)
Exercising power of police inside the park
Coordinating evacuations *
Checking admission permits (in Horcones and Punta de Vacas)
Controlling waste collection (of individuals and service providers)
These are some of the duties, among other.

* Together with the medical service and the rescue patrol to the park exit. Evacuations will be coordinated by the medical staff in charge of emergencies, by the means they consider necessary or which are available (mules, helicopters, ambulance).
Besides, when the park ranger or physician judge that the climbers' equipment or physical conditions are poor, they will be advised in writing not to ascend.

The responsibility for control and watch only includes from the park entrance to the base camps (4300 meters above sea level). Beyond that altitude, they perform only evacuation and cleaning duties.
For all these tasks, the park rangers have an adequate equipment and modern communication systems which allow them permanent radio coverage all over the park in VHF to prevent emergencies. The radio frequency is 142.8 MHZ FM.

The park administration is located in Horcones and from there the work of the different camps is coordinated, mainly those in which the park rangers are always present such as Confluencia, Plaza de Mulas, Nido de Cóndores, Punta de Vacas, Pampa de Leñas and Plaza Argentina.