As used in this subchapter:
(1) “Employer” means any individual, organization, or governmental body, including any partnership, association, trustee, estate, corporation, joint stock company, insurance company, or legal representative, whether domestic or foreign, or the receiver, trustee in bankruptcy, trustee or successor thereof, and any common carrier by mail, motor, water, air, or express company doing business in or operating within this State, and any agent of the employer, that has one or more individuals performing services for it within this State.
(2) “Employee” means every person who may be permitted, required, or directed by any employer, in consideration of direct or indirect gain or profit, to perform services.