types:
as,
crack
someone who is dazzlingly skilled in any field
analyste
an expert who studies financial data (on credit or securities or sales or financial patterns etc.) and recommends appropriate business actions
arbitre
someone with the power to settle matters at will
ordinateur
an expert at calculation (or at operating calculating machines)
horticulteur
an expert in the science of cultivating plants (fruit or flowers or vegetables or ornamental plants)
scout,
scoute
someone who can find paths through unexplored territory
tireur
a person who shoots (usually with respect to their ability to shoot)
spécialiste
an expert who is devoted to one occupation or branch of learning
technicien
someone known for high skill in some intellectual or artistic technique
thérapeute
a person skilled in a particular type of therapy
vieux routier,
vétéran
an experienced person who has been through many battles; someone who has given long service
expert,
spécialiste
an expert able to appreciate a field; especially in the fine arts
expert,
juge
an authority who is able to estimate worth or quality
météorologue
a specialist who studies processes in the earth's atmosphere that cause weather conditions
médecin
therapist who treats injury or dysfunction with exercises and other physical treatments of the disorder
orthophoniste
a therapist who treats speech defects and disorders
statisticien
someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums)