Complex sentence: Cheesemakers are people or companies that makes cheese, who have developed the knowledge and skills required to convert milk into cheese, by controlling precisely the types and amounts of ingredients used and the parameters of the cheesemaking process, to make specific types and qualities of cheese.
Split into simpler sentences: Cheesemakers are people or companies that makes cheese, who have developed the knowledge and skills required to convert milk into cheese. Cheesemaking involves controlling precisely the types and amounts of ingredients used and the parameters of the cheesemaking process, to make specific types and qualities of cheese.