Squat, a condo administrator is the General Manager or Chief Executive Officer of a condominium. He is responsible for all aspects of the management of the condo and reports to the consortium of owners. The condominium law spells out many of his responsibilities. He hires the employees, supervises their work, is responsible for the administration and preparation of the budget, and in general oversees everything that goes on in the condo. Depending on the size of the condo, he/she may have a bookkeeper or the administrator may keep the books. There may be a rental agent to assist, or the administrator may be the rental agent. There may or may not be a secretary. Specifics vary from condo to condo depending on size and other factors, but the above should give you an idea of what is involved.
Fortunately, El Neptuno where I live has the best administrator on the North Coast, maybe all of the Dominican Republic.