In Action Comics #842, Skyrocket describes herself as somebody who "used to be with the Power Company".
ɪn ˈækʃən kˈɑːmɪks hˈæʃ ˈeɪthˈʌndɹɪd fˈoːɹɾi tˈuː, skˈaɪɹˌɑːkɪt dᵻskɹˈaɪbz hɜːsˈɛlf æz sˈʌmbɑːdi hˈuː "jˈuːzd təbi wɪððə pˈaʊɚ kˈʌmpəni".