Experience in providing the follwing services:
Support and configuration of new hardware and software.
Support and configuration of necessary updates of OS and installed programs.
Designing and configuring backup systems.
Eliminating DDoS / spam attacks.
Automating tasks with scripts.
Serviced a park of ~500 servers (mostly hosting providers) from different clients in DCs in Europe, North / South America, Asia and Africa.
Experience with software:
Apache, nginx, lighttpd
exim, postfix, sendmail, qmail, dovecot,...