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+13 years experience, RedHat and SUSE certified, critical-infrastructure sysadmin and open source specialist: CentOS/Debian/SUSE Linux, Open/FreeBSD, HA and cluster,
performance tuning, ansible, apache, nfs, samba, dns, postfix, git, nagios, cybersecurity,
Data Transfer Node Engineer (contract), Géant
Aug 2018 - Dec 2018 (5 months), Amsterdam Area, Netherlands
GÉANT is the pan-European data network for the research and education community,
interconnecting 50 million users in over 10,000 institutions.
Fedora OS data transfer nodes hardening and performance tuning: Mellanox 100G network cards,
libVMA (user space library for network socket acceleration) and NVMe disks (RAID0+xfs).
Google Calendar-based booking system implementation.
Support for CERN Large Hadron Collider Open Network Environment data transfer experiments.
Security-focused administration (RHEL) for Irish Water and Gas Networks HA platforms
(corporate websites, Oracle RAC, SCADA, Primavera, ODI/ODS, CC&B, SOA, EBS, Documaker and IBM Maximo, ConnectDirect, Alfresco, CoreHR).
Building, hardening and patching processes automation (ansible/ks/bash).
Enterprise level access control (AD/kerberos/sssd/sudo/samba).
Private cloud infrastructure management (VMware vSphere).
Vulnerability assessment-based advice implementation (Qualys, Lynis).
Troubleshooting standard TCP/IP protocols (http/s, nfs, smb, dns, ssh).
Antivirus management (ClamAV, McAfee).
Support for Orange Spain mobile value-added services (MVAS) infrastructure.
Support for production Oracle RAC, serving eight million customers.
Multi-flavour Linux and NetApp administration.
Ensuring continuous operation of TekComms product (TouchPoint) deployed at customer sites
(Vodafone, T-Mobile, O2, Swisscom, Telstra and du).
Traffic analysis for A, Gb, IuPS, IuCS and Gn in 2G/3G/LTE networks.
Unix scripting, awk, RedHat 5/Solaris 10 administration.
Oracle 11g data mining and SAP Business Objects support.
Troubleshooting and ensuring SLAs terms (part of the 24x7 on-call rota team).
Managing customer support communications through complete issue life cycle.
Performing support activities including troubleshooting hardware (HP servers) and software
(SourceWorks DPI) issues for Vodafone, T-Mobile, Everything Everywhere, Cosmote and others.
Ubuntu admin and performance tuning: 115 Gn/4G/Gp probes and balancers.
Wireshark-based GTP-C/GTP-Cv2, GTP-U and TDRs traffic analysis.
Bash/awk scripting, upgrades and nagios deployment and SNMP integration.
Weekly SLA review meetings with customers. Part of the 24x7 on-call team.
Collaboration with development teams to produce fixes. Gira/Confluence Agile environment.
SASN (traffic inspection tool in multi-vendor and multi-access networks, policy control and charging) server farms at Ericsson R&D Spain.
Support to 150 designers/testers, SuSE 11 admin and massive migrations.
TCP/IP LAN administration, DNS and security policies implementation.
Over 250 Oracle Sun servers, 125 Extreme copper/fiber switches and 500 VMWare ESXi VMs.
Level 3 Network and Security Operation Center mission critical technical support to contextual
marketing provider (Pontis) for their high-performance platforms for Vodafone's customers.
Hardening and support for PP web farm during Spanish presidential election.
Infrastructure development, 24x7 shifts, Solaris/Linux administration, platforms monitoring,
networking definition and tests, balanced services and VPN implementation and CPD tasks.
Over 200 machines (most of them HA or cluster) including IBM/Sun/Dell servers, IBM
BladeCenter, Juniper SSG firewalls, CoyotePoint L4/L7 balancers, Cisco switches and Xen/ESXi
Monitoring system operation for CENAGES, main hub for B2B call centers.
Call accounting and tracking systems (CPSA, CCIP, 118AB, Nuov@) integration and monitoring.
Business activity DB modeling (centers/operators/routers/probes/calls).
Oracle 10g medium-size administration, performance tuning and automation of large data loads from several external heterogeneous DBs.
Sun sparc Solaris servers administration, ksh and perl systems programming.
SPRA project: Movistar Imagenio (IPTV) OSS/BSS provisioning system.
DB patching. PL/SQL Oracle 9i ETL processes development on Solaris 8.
Las Palmas De Gran Canaria Area, Spain
Hospital Information System (Siemens Selene) deployment for Canary Islands Health Service
(Insular, Materno-Infantil and La Candelaria).
PL/SQL Oracle 9i development, AIX 5L 5.3 environment.
Data mining and data migration. ETL, massive data cleaning and mapping.
Las Palmas De Gran Canaria Area, Spain
Content management systems, corporate intranet, e-commerce and reservation systems
development (Ron Arehucas, Cordial Canarias, RE/MAX, Tecnocasa, Grupo Vips, Companía