The short answer
Yes—when access-control duties are included in the contract and written post orders, security officers can help administer a construction site’s approved entry procedures. That may include checking a person or vehicle against an authorization list, recording arrival and departure times, directing visitors to a designated check-in point, confirming a delivery contact, issuing temporary credentials supplied by the client, and denying entry when the stated requirements are not met.
What to know
The client must define the rules. Before service begins, identify who can authorize access, what identification is acceptable, which gates and hours apply, how unscheduled deliveries are handled, whether vehicles or packages may be inspected with consent, and whom the officer should contact when information conflicts. A guard should not improvise screening standards or make employment decisions for the contractor.
Access records are most useful when they are consistent and auditable. Logs should capture only the information legitimately needed for security and operations, then be stored and retained under the client’s privacy policy. For after-hours access, require explicit authorization and an escalation path. Physical access control works best when fencing, lighting, keys, badges, cameras, and officer procedures support the same plan.