Abstract: A safety anchor post system mountable to a pre-set anchor embedded in concrete for protecting a user from falling while working in precarious areas is provided. The system comprises a tubular post having a first end and a second end with a coil rod extending from the tubular post. A first sleeve is mounted at the second end of the post. A second sleeve is mounted between the first sleeve and the first end of the post with at least one rail member receivable within each sleeve. A clamping mechanism tightens against the rail members to releasably maintain the at least one rail member within each sleeve. A tie off device is mounted to the post. Upon releasably securing the at least one rail member within each sleeve and tying off to the tie off device, a worker is inhibited from falling from the support structure.