I know you are looking to follow the chain of command, so take this with the proverbial grain of salt. I agree in following the chain of command, but if one link can't provide you with the information you are seeking, it is time to move up. I started out talking with HR and the nursing recruiter. He was a great guy, but told me I would be working nightshifts for 6 months on the ortho floor. No thanks, at least not for me. I was offerred a job unofficially before HR ever acknowledged receipt of my resume! I know they are busy, but I wanted a job.
So I did contact clinical managers, and they offerred positions that HR didn't have listed (day shift openings). I set up an appt, had a long list of questions, brought in my resume, and basically sold myself as a brand new nurse willing to learn and wanting experience. I only contacted 2 managers. The first was a manager in CCU, who I contacted to discuss the possibility of future employment and her recommendation as to what would best prepare me. She had some really great input, and referred me to my current clinical manger on the telemetry floor. I had a casual interview, and was told that the hiring was already done for that period, but that she had never had a nurse be so interested and would like to offer me a full time position on day shift.
Is there a reason why you haven't contacted the manager? Maybe this is who interviewed you, I am not sure. Many hospitals also have clinical pathways, which are the chain of command to get you prepared to move into a specialty unit. If you are trying to bypass this step, I do think it is important to talk to the manager directly. HR may decide you aren't qualified (ie no 2 yr experience in acute care) and never forward your resume. You might also discuss your situation with other new grads who are working in your hospital of choice..they may have suggestions and know someone that could help you get your foot in the door. Best of luck in your job hunting! Don't settle.... I am sure the right position is out there and waiting for you!