El Espiritismo tiene algún tipo de jerarquías o líderes?

No, the Spiritism has no leaders, no priests, no hierarchy of any kind.
In order to deepen our spiritism knowledge it may be sufficient to study alone and individually. But as in all matters of life and as the "social animals" that we are, we need to exchange ideas, to share our knowledge, and even, in some cases, to spread it. That is why, from the origin of the spiritism movement, associations have arisen. From the moment there is a group of people who meet and carry out activities, according to the legislation of each country a certain organisation is necessary, generally established and defined in the laws of associations. In this way, we can find leadership positions in the spiritism associations, just as we can find them administratively in any other type of association. In the particular case of the spiritism movement they will necessarily be free of charge and free of any profit motive.
Most of these associations, to a greater or lesser degree, and on their own initiative, carry out tasks of study and dissemination of the spiritist principles, and open their doors in the broadest sense of the expression to help anyone who may need it, whether it be for mediumistic problems, moral, spiritual or even material needs. Making effective the most important spiritist and humanitarian principle that the human being can carry out, charity.