You're correct in the sense that it is the responsibility of the department, in this case CBSA, to determine what their needs are and the criteria they will evaluate against those needs and to set the grids. Then they actually undertake what we would call the technical evaluation of looking at the qualifications and experiences of those resources against their needs.
Evidence of meeting #85 for Government Operations and Estimates in the 44th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was contract.
A video is available from Parliament.