I have rich experiences over 8+ years with VoIP & System & Network Administration. Here's what makes me different: - Skills: ? Operating Systems: Linux (Ubuntu, RedHat, CentOS), Windows Server and Desktop ? Programming: PowerShell, Bash Script, Python, C/C++, Java ? Cloud Computing: Amazon AWS: EC2, VPC, S3, Lightsail; Digital Ocean ? Monitoring and Logging: Nagios, Zabbix ? Networks: NAT, VPN, Firewalls, Load balancers, IP Routing(BGP, OSPF, EIGRP, RIP), VLAN, OpenVPN, VPS ? Network Services: DHCP, DNS, NFS, FTP, SAMBA, SNMP, SSH ? Security: SSL Certificates, Spam and Antivirus protection ? Voice over IP: Asterisk, Kamailio, FreePBX, SIP, RTP ? Development of IVR/Hotline systems, Predictive Dialers, Conferencing and Voicemail systems