The person responsible for determining if acceptable entry conditions are present at a confined space where entry is planned, for authorizing entry, overseeing entry operations, and for terminating entry. The duties of entry supervisor may be passed from one individual to another during the course of an entry operation. These responsibilities also may be transferred between the owner and contractors.
Source: API Standards 2217A, Guidelines for Safe Work in Inert Confined Spaces in the Petroleum and Petrochemical Industries, Fourth Edition, July 2009. Global Standards