SUMMARY

Professional experienced and certified offering 10+ years of managing linux server infrastructures, network services and IP telephony. Expert in Red Hat, CentOS and Debian (RHCE, RHCSA, LPI, ITIL certifications). Experienced with project management and deployment of 800+ linux servers in various environments under high - pressure, such as: firewall, web, databases, email, and PBX. Strong experience delivering linux servers: provisioning, installation, configuration management, monitoring, orchestration, upgrading, and maintaining hardware, software and network. Proven ability to create and deliver optimized IT solutions tied to business growth, consistently to achieve high availability and performance.

AREAS OF EXPERTISE

• Linux System Administration
• Automation
• Project management
• Network services
• Server deployment
• Technical troubleshooting

TECHNICAL SKILLS

Firewall: advanced iptables rules, QoS, SonicWall, PFSense, Cisco ASA, ProxyARP

Proxy: squid (advanced ACL, NTLM integration), reports, tinyproxy, DansGuardian, ClamAV, HAVP

Asterisk: advanced dialplan, macro programing, queues, SIP/IAX trunks, IRV, CallCenter integration

Telecom: PSTN, GSM, FXS/FXO, provisioning SIP phones, ATA, gateway, Khomp, GrandStream, etc

Multilinks: load balance, routing, traffic distribution and monitoring, HAProxy

VPN: OpenVPN (site2site, client2server, certificate management, routing), and IPSec

Automation: Ansible, Ansible Tower, Puppet and Foreman, provisioning machines Storage, RAID, LVM, iSCSI, NFS, Samba CIFS, quotas, NAS, DAS, SAN Development, python, PHP, shell-script, regex, HTML, and CSS Switch VLAN, LACP, ACL, etc

Routing: TCP/IP, LAN/WAN/DMZ, VLSM, RIP, OSPF. Cisco, Dell and HP routers experience

Virtualization: Amazon Web Services AWS, KVM, VirtualBox, VMware, libvirt, and Hyper-V (Docker)

Cluster: active/active, active/passive, data/database sync, management services, etc

DNS: setup views, zones, zone transfer, dynamic update, records (A, CNAME, TXT, SPF, PTR, etc)

Web: Apache (virtual host, proxy pass, modules), TomCat deployment, load balance

E-mail: Qmail/Postfix/Sendmail, SMTP/POP3/IMAP, anti-spam/anti-virus, Zimbra and Webmail

Database: management of MySQL/MariaDB, PostgreSQL, and Firebird

Kernel: patching and compiling

Monitoring: various servers and services with SNMP, Nagios, Cacti and Zabbix

Provisioning: setup and deployment with PXE, ThinStation and Anaconda/Kickstart provisioning

Embedded: OpenWRT installation, compilation, and package management

Electronics: Arduino boards (analog/digital pins), Raspberry Pi GPIO, serial communication, i2c, 1Wire Others, SELinux, cryptography, bound/alias/bridge network interface, Webmin, OpenLDAP, SSH, VNC, iDRAC, iLO, fail2ban, OpenFire (XMPP), NTP, DHCP, DLNA, FTP, TFTP, CRON, RPM (SPEC, repository), source code compilation, firmware update/downgrade, protocol analysis (WireShark, tcpdump, ngrep)

PROFESSIONAL EXPERIENCE

Linux System Administrator

Confidential

Responsibilities:

• Standardized the project management of all products through methodologies of PMBOK, Agile and ITIL.
• Increased in 60% deployment efficiency of all products, developed a model for provisioning and setup.
• Multiple projects management, supervision the team in all stages of the project lifecycle, ensuring the deliverables remains on track, aligned with business goals, expectations, meet the deadlines and under budget.
• Participated actively in implementation of products of 800+ linux servers in various environments.
• Designed reports, charts and graphs for chief technical officer providing status, results and performance.
• Created disaster recovery plan in various environments.
• Increased the support team productivity, by implementing the ITIL best practices.
• Created a documentation structure based on ITIL to facilitate and standardize the documentation of process, products and manuals.
• Helped the team solving complex issues (level 3) related to linux servers, networking and IP telephony.
• Strong skills with help desk, support via phone, email, remote access for technical troubleshooting.
• Implemented the monitoring tools Nagios and Zabbix for 200+ servers and tons of services.
• Setup of routers, switches and modems (WAN/LAN/DMZ/VLAN)
• Migration from physical to virtual machines (KVM, VMWare, Hyper-V).
• Experienced with backup routines (execution and restoration)
• Efficient support with asterisk, provisioning, E1, GSM, SIP/IAX2 trunks, advanced dialplan, queues, etc. Development
• Developed a VPN web management, which became the first best-selling product.
• Reformulated the Multlinks, which became the second best-selling product.
• Implemented a robust structure to convert all products into RPM packages and repository.
• Developed a script to perform preventive maintenance on linux servers, time saving about 60%.
• Developed tons of shell-script to automate variety of tasks.
• Conducted researches to create a new product, targeted on customer's branches, using the firewall product into a small hardware, Mikrotik and OpenWRT.

Technical Support

Confidential

Responsibilities:

• General maintenance in computers for companies and home users using Windows, Linux and Mac OS. Desktop PC assembly, installation, configuration, updating, hardware issues, troubleshooting, virus removal, and others.