2 U.S.C. § 4101 - U.S. Code - Unannotated Title 2. The Congress § 4101. Authority of officers of Congress over Congressional employees

(1) to determine, before the appointment of any individual as an employee under the supervision of that officer of the Congress, whether that individual possesses the qualifications necessary for the satisfactory performance of the duties and responsibilities to be assigned to him; and

(2) to remove or otherwise discipline any employee under his supervision.

(1) an elected officer of the Senate or House of Representatives who is not a Member of the Senate or House; and

(2) The Architect of the Capitol.