A specialist is someone who is highly knowledgeable and skilled in a specific area or field. They have expertise and experience that make them experts in their particular subject. Full definition
This approach makes use of expertise of in house specialists in the form of teachers and teaching assistants. (hundred.org)
We have a very strong team of specialists in the field of insurance, tort and compensation. (lawyer-monthly.com)
We also have a wide network of veterinary specialists with whom to consult or to whom to refer, depending on each patient's unique needs. (animalclinicdelrancho.com)