experts
ˈɛkspəːt
noun
a person who is very knowledgeable about or skilful in a particular area.
an expert in healthcare
specialist,authority,pundit,oracle,resource person,adept,maestro,virtuoso,master,past master,professional,genius,wizard,connoisseur,aficionado,one of the cognoscenti,cognoscente,doyen,savant,ace,buff,ninja,pro,whizz,hotshot,old hand,alpha geek,dab hand,maven,crackerjack,proficient