Linq query and early bound

hello guys 

hope you are fine !

id like to write a code that retrieve data from two entities (vacancy , employee) -im now in the employee entity- so i can find if these fields are equal (using linq query) to create a new record .. Im working in a crm 2016 on-premises .

As a new crm developer i dont know how to retrieve data and how to write this linq query ..

lets suppose that the fields i want to retrieve data from are :

1-Position(emp) == Requested position (vacancy) ?

2-Employement (emp) == Vacancy Type (vacancy) ?

3-Age(emp) == RequiredAge (vacancy) ? 

and do i have to use early bound in my code , if yes how do i write it?

Thank u in advance !