Years of experience with telecom infrastructure, "carrier grade" network equipment and server administration. I have worked as server admin, NOC (network operations center) manager and technical consultant for various wireless carriers (mobile phone operators) on three continents. Keywords: servers (linux, windows), application servers (too many to list), cisco, juniper, virtualization (vmware, hyper-v, openstack, etc), cloud (public - AWS, Rackspace, etc, private), databases (Oracle, MySQL, MSSQL), voip (very advanced), real-time billing systems, etc.