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Manuel Munoz Calero

  • System Engineer/Architect/Administrator
  • Santa Cruz de Tenerife, Spain
  • Jul 30, 2019
Telecommute Information Technology Professional Services Research Science Telecommunications

Work Experience

Data Transfer Node Engineer
Aug 2018 - Dec 2018 CentOS/Debian/SUSE Linux, Open/FreeBSD, HA and cluster

+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,
VMWare, SAN, TCP/IP, SQL, PL/SQL, Oracle, MySQL, bash, awk, php, python, C and javascript.

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.

Senior Linux Infrastructure Engineer, Ervia
Sep 2016 - Aug 2018 Security-focused

Ireland
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).

Linux Systems Administrator
Dec 2015 - Feb 2016 Huawei Technologies

Area, Spain
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.

Support Engineer
Mar 2014 - Mar 2015 Tektronix Communications

Ireland
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.

Linux Support Engineer
Jun 2013 - Mar 2014 IBM

Ireland
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.

Infrastructure Engineer
Dec 2012 - May 2013 Ericsson

Area, Spain
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.

Linux/Solaris Systems Administrator, acens/Hostalia
Mar 2011 - Aug 2012

Area, Spain
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
host.

Systems Administrator, Telefónica
Jan 2009 - Jan 2011 CENAGES

Area, Spain
Monitoring system operation for CENAGES, main hub for B2B call centers.
Call accounting and tracking systems (CPSA, CCIP, 118AB, Nuov@) integration and monitoring.
Corporate intranet (Joomla/PHP/JavaScript) development and administration.
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.

Oracle Developer
May 2008 - Oct 2008 Alcatel-Lucent/Nokia Bell Labs

Area, Spain
SPRA project: Movistar Imagenio (IPTV) OSS/BSS provisioning system.
DB patching. PL/SQL Oracle 9i ETL processes development on Solaris 8.

Oracle Developer
Feb 2006 - Sep 2007 Siemens Healthineers

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.

LAMP Developer
Mar 2004 - Feb 2006 Smartec Canarias/Albanova

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
Cervecera de Canarias ). PHP, JavaScript, Apache and MySQL DB on SuSE/Fedora.

Education

Jan 2002 - Jan 2002 Universidad de Las Palmas de Gran Canaria
Bachelor's Degree - Computer Science
Jan 1998 - Jan 2001 Universidad de Las Palmas de Gran Canaria