The Collaborative International Dictionary of English v.0.48:

Managerial \Man`a*ge"ri*al\, a.
   Of or pertaining to management or a manager; as, managerial
   qualities. "Managerial responsibility." --C. Bront['e].
   [1913 Webster]

WordNet (r) 3.0 (2006):

managerial
    adj 1: of or relating to the function or responsibility or
           activity of management

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "managerial":
   agential, agentival, agentive, chief, commanding, controlling,
   directing, directive, directorial, directory, functional,
   governing, guiding, head, leading, managing, manipulational,
   operational, regulating, regulative, regulatory