Guilherme Boing Walter Email & Phone Number

Austin, Texas, United States

São Paulo Area, Brazil

Florianópolis, Santa Catarina, Brazil

On a daily basis, I provide support for the growth of HostGator LatAm, supporting our devs/people and provisioning/managing servers. My current role consists of:- Provisioning, setup, management, security and monitoring of core corporate servers and services (billing, email, databases, jumpboxes, staging, etc);- Management of over 800 linux shared hosting servers (general webhosting, wordpress only servers, reseller servers);- Support for our internal staff (dev, products, support), regarding our products, servers and services;- Analyze and deploy softwares to production, products and changes to our systems, for both corporate and public shared hosting servers;- First point of contact for technical issues regarding both our corporate and public servers;- Development of internal tools and reports in order to assist all our departments and automate different kind of tasks;I also inherited some of my responsibilities as a Monitoring Analyst, helping the Monitoring team and their ~800 linux servers when needed:- Troubleshooting server issues (IO, CPU and Memory usage, MySQL, SPAM, Disk issues, Phishing, Hacking);- Monitor critical services such as Apache, nginx, MySQL, Exim, Dovecot, cPanel/WHM;- Assist in identifying problematic servers and schedule hardware maintenance;I started working for HostGator Brazil and ended up being one of the few people responsible for building HostGator LatAm servers/infrastructure.We started as HostGator Brazil and now we have HostGator Mexico, Colombia and Chile.

Florianópolis Area, Brazil

Member of a team of 3 that are responsible for monitoring over 800 mixed servers (CentOS 6/7: Shared Hosting, Reseller Servers, VPS and Corporative) for Endurance LATAM (HostGator Brazil, Mexico, Chile and Colombia).- Maintaining servers up and running;- Troubleshooting server issues (IO, CPU and Memory usage, MySQL, SPAM, Disk issues, Phishing, Hacking);- Monitor critical services such as Apache, nginx, MySQL, Exim, Dovecot, cPanel/WHM;- Assist in identifying problematic servers and schedule hardware maintenance;I have created multiple internal tools that were developed in order to assist and automate most of the tasks that we usually ran manually, such as dealing with SPAM, Disk issues and notifying customers that were abusing our T.O.S.

Florianópolis, Santa Catarina, Brazil

I am working as an Infrastructure Analyst, System Administrator and Network Administrator.My main responsabilities are:• Over 25 physical servers (IBM, Dell, Lenovo) running CentOS, Fedora, Ubuntu, Debian and FreeBSD - buying, installing, maintaining, backup and monitoring;• Over 20 remote virtual servers on Digital Ocean datacenter;• Internal and external office network.Services I've been maintaining and am responsible for:• Firewalls (ipfw/pf/iptables);• Web Servers (Apache/nginx);• DNS (bind/unbound);• Internal Proxy (squid);• External Proxy Cluster (HAProxy+tinyproxy);• Email (postfix+qmail+postgrey);• Databases (PostgreSQL/MySQL);• Monitoring (Zabbix);• Virtualization (XenServer/VMware ESXi);• Backup (rsync/rdiff-backup);• NOC Dashboard (using Dashing.IO);• Automation/Provisioning (Ansible);• Active Directory (Samba4 as AD DC);• Penetration Tests;• Hardening;• IDS (OSSEC).

São Paulo Area, Brazil

Management of the South Korean games Priston Tale and FreeJack.• Game Management• Server/Client Management• Database Management• Quality Assurance• Troubleshoot• Hacking Issues

São Paulo Area, Brazil

Setup and management of more than 30 dedicated servers (Windows Server and Linux) on the remote datacenter of OVH, Beauharnois (CA). Responsible for IT security management.Maintained and was responsible for:• Nginx/Apache/IIS• MySQL/PerconaDB/MariaDB• Cacti/Zabbix• RSYNC (backup)• iptables/ipfw• Citrix XenServer• Penetration Tests• Hardening• IDS• Risk & Vulnerability management

São Paulo Area, Brazil

Responsible for the IT Security of more than 30 servers• Penetration Tests• Server/Infra Hardening• IDS

Florianópolis Area, Brazil

As a data communications analyst, I was responsible for the installation analysis of new data contracts (circuits). I was also responsible for doing the troubleshoot related to the these circuits, such as connectivity issues or misconfigured hardware.Solutions I have worked with:• Cisco;• DataCom (MUX, DM705, DM880);• IGX/BPX/MGX;• Frame-Relay, ATM, MetroEthernet, X25, EILD, DDR