types:
agrónomo
an expert in soil management and field-crop production
manitas
a versatile person who is expert at many things
analista
an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions
autoridad
an expert whose views are taken as definitive
cinturón negro
a person who attained the rank of expert in the martial arts (judo or karate)
horticultor
an expert in the science of cultivating plants (fruit or flowers or vegetables or ornamental plants)
lapidario
an expert on precious stones and the art of cutting and engraving them
lógico
a person skilled at symbolic logic
explorador,
guía
someone who can find paths through unexplored territory
estafador
a person who is unusually skilled in certain ways
pistolero,
tirador
a person who shoots (usually with respect to their ability to shoot)
especialista
an expert who is devoted to one occupation or branch of learning
talento
a person who possesses unusual innate ability in some field or activity
técnico
someone known for high skill in some intellectual or artistic technique
veterano
an experienced person who has been through many battles; someone who has given long service
agregado
a specialist assigned to the staff of a diplomatic mission
evaluador,
juez
an authority who is able to estimate worth or quality
grafólogo
a specialist in inferring character from handwriting
herbolario
a therapist who heals by the use of herbs
tirador
someone skilled in shooting
meteorólogo
a specialist who studies processes in the earth's atmosphere that cause weather conditions
oculista,
optometrista
a person skilled in testing for defects of vision in order to prescribe corrective glasses
osteópata
a therapist who manipulates the skeleton and muscles
físicoterapeuta
therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder
actuario de seguros,
estadista
someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums)