I can see why the Officer has concerns. The lead statement of NOC 0711 - Construction Managers states the following:
"Construction managers plan, organize, direct, control and evaluate the activities of a construction company or a construction department within a company, under the direction of a general manager or other senior manager. They are employed by residential, commercial and industrial construction companies and by construction departments of companies outside the construction industry"
The lead statement suggest that these roles are more of a "managing" role and some of your duties appear to be "supporting" in nature rather than "managing" in nature. Therein lies the concerns of the Officer. You might consider addressing this via email.
