Right now I'm attending RedHat courses.
I've just achivied certification RHCSA ( Red Hat Certified System Administrator), and I'm planning to get RHCE ( Red Hat Certified Engeneer) and following. ( on DNS, NFS, SMB, SNMP, DBs services )
Subsequently, I will complete my training on networks and networking through the achievement of the two Cisco certifications CCNA and CCNP.
From 2014 I'm employed in a company operating in the telecommunications, as linux sys administrator on redhat PEC mailing system environments ( based on postifix / openldap /mysql / openpec )