I have experience in developing and maintaining of:
Cloud computing platforms:
AWS Amazon Web services, Microsoft AZURE, Google Cloud (GCP).
Server Operating System:
Windows Server 2003-to-2012R2, Windows Server 2016 Amazon Linux, Debian, RHEL,CentOS, Ubuntu.
Web Services and setvlets containers:
IIS,APACHE,NGINX,DOCKER
Mail Servers:
POSTFIX,EXIM,MS Exchange 2000-to-2013,MS Exchange 2016,QMAIL
Database servers:
MySQL, MS SQL
Virtualization:
MS Hyper-V, VMware server(ESXI), VirtualBOX.
Directory service:
Active Directory, OpenLDAP.
File Servers:
IIS FTP, proftpd, Filezilla FTP Server, SAMBA;
Data storage systems:
NetApp,FAS, EMC, VNX;
Hosting Panels: PLESK, Cpanel, Website panel.