As a Certified SCCM 2012 Administrator with experience on security updates patching, Windows 7, print server and file server administration. I think you will find I have the skills you are looking for.
Please take a look at my portfolio and get an idea what kind of skills I have. Currently I am working on patching of Microsoft and Non Microsoft security updates on Windows 7 workstations.
Knowledge of Windows 7 Skills Test
oDesk Readiness Test for Independent Contractors and Staffing Managers