Marcelo Grebois

My current responsibilities goes from simples distro updates to complex integration and interaction of the Jenkins CI, datacenter orchestration using SaltStack, VM provisioning and QA testing.

Some of my responsibilities were to improve and optimize the company technology and infrastructure, advising about all the processes and procedures, design and implement different types of projects regarding the enterprise, deal with client as well with providers, coordinating work with my actual team (around 200 people), handling department budget and taking final decision on new implementation.

I've worked as Project Manager for Claro account, managing Ring Back Tone (RBT), Long Distance and International (LDI) and Next Generation Intelligent Network (NGIN) projects for Argentina, Uruguay and Paraguay, and at the same time for Movistar, including VPN, Dynamic Tariff (DT) and Rich Communication Suite (RCS).

The most relevant responsibilities of this position were; people management and project management. I was also in charge of the budget management of my department and the hiring’s of new talents. I get the chance to stay much closer to the client and start many new business relations; our team was composed of about 100 people working in 6 different sectors. The main projects I lead were the network review and optimization of a Mikrotik based WISP and the GPON network implementation

I stated at IBM as a Windows Administrator for the Sanofi-Aventis account, my responsibilities were; Windows Servers Administration, Citrix Administration, VMWare Administration, SOX Audit,etc. After a while I started collaborating with other accounts like Novartis; creating an script to gather information from about 6000 servers that was later used for the automation of several tasks. I've ended up working for the Server Consolidation team, as a VMWare Engineer, 16 people composed the team.

Developing and implementing security standards and procedures based on my own security audits, following ISO or SOX standards according to the industry involved. I've also done several pen testings, wireless security analysis, vulnerability testing, IDP and IDP implementation; honeypots logs analysis, disaster recovery plans, and forensics. As part of my development I've designed an open source IDP solution based on Snort for very complex network implementations, paper is available for download.

Several times I've worked auditing code, doing applications vulnerabilities analyst and pen testing over the internal network. I was part of the team that implemented ISO 17799 and SOX standards for the entire company. During that time I also designed a IDS solution and developed the rules for Proventia IDP products. Web security and physical security were also part of several implementations. The tools I've most used during this jobs were; Nmap, Netcat, Nessus, Wireshark, IDA Pro, etc.

I started as a system administrator, working with around 10 windows servers. As part of my responsibilities I designed, planned and implemented an information security infrastructure that included ISA servers, IDSs, network antivirus and a VPN server. Short after that, I migrated the datacenter from Windows 2000 to Windows 2003.

Configured and implemented 2 fully complete Dell racks with PowerEdge servers, migrated the Symantec Antivirus server to the new farm, and update the client on every workstation, implemented a CiscoWorks instance to manage the entire network, and participated in the design of the Windows 2000 to 2003 migration. During this time I had the chance to work with several technologies and implementation like; Windows 2000, Windows 2003, Linux, Windows XP, Cisco, Dell, IDSs, Symantec Antivirus, CiscoWorks, etc.

Virtualization and Enterprise OpenSource Solutions