Lyle is a security suard working for LuthorCorp.
Season Four
Together with two other security guards, Lyle brought Lex Luthor to a spot outside of the Luthor Mansion, where the remains of Bridgette Crosby had been found by a member of the staff. When Jason Teague showed up and started asking question, Lex ordered Lyle and Edwards (another of the security guards) to remove Jason from the scene.