My technical experience and interests as a system engineer and system architect focus on Linux and Open Source software, preferably Red Hat Enterprise Linux (RHEL), CentOS and Scientific Linux. With more than 17 years of experience I am one of the Linux pioneers in Belgium and well-known within the specific Red Hat Linux community. Skills include deploying, migrating and managing Linux infrastructure (servers and desktops), packaging Unix software, designing and implementing system tools, improving hardware support and automating operational tasks using python, shell scripting and perl with attention to documentation, standardization, procedures and policies. I am available as a freelancer for contract work inside and outside of Europe, but not willing to relocate on a permanent basis.

Full name Dag Johan Maarten Wieërs Location Ghent, Belgium Phone +32 478 436 299 Email dag@linux.com Website http://dag.wieers.com/blog/, http://be.linkedin.com/in/dagwieers

⇒ References provided on request

May 2010 → now (ongoing) Linux system engineer Troubleshooting Linux, SAN/multipathing problem. Best practices for Linux multipathing and SAN performance. Assessment and design of Linux reference architecture. RHN Satellite design. HP-UX ksh to Linux migration best practices. Incl. Atos Worldline, Dexia Technology Services, SWIFT, Electrabel Linux system developer Implementing disaster recovery solution. Improvements to installation scripts and webmin modules. Packaging improvements. Automation and scripting. Design and implementation of a samba/anti-virus solution. Documentation and troubleshooting, at Belgian Federal Police.

Nov 2007 → Mar 2010 (2.5 years) Linux system engineer Linux migration of Belgian datacenter to Germany. Design and implementation of modular framework and infrastructure for Linux and VMware ESX, used for deploying, retrofitting and validating Linux servers. 3rd level support, troubleshooting and design work.

Jul 2007 → Dec 2007 (6 months) Linux system engineer Short assignment Implementation of infrastructure for Novell SLES Linux deployment for technical development workstations. Integration with Active Directory, NIS, Clearcase, VMware Server.

Jun 2007 → Sep 2007 (4 months) Linux system engineer Short assignment Design and implementation of technical documentation system. Design and implementation of subversion. Packaging for Novell SLES Linux. Troubleshooting. Automation.

Dec 2005 → May 2007 (2.5 years) Unix system engineer Deployment of Unix systems and services. Design and implementation of management infrastructure (configuration and documentation management, change management). Packaging for Solaris, AIX, Linux and VMware. Custom software development. Troubleshooting. Automation.

Oct 1999 → Apr 2001 (1.5 years) Founder / Business unit manager Taking care of various parts of the organization, including sales and marketing. Experience with project-management and presales for a small (15 headcount) consultancy company. Consultant Linux and Open Source consultancy and training for several customers in on-site projects varying between 1 and 3 weeks.

Sep 1999 → Dec 2005 (5.5 years) Unix system engineer On Unix and Linux systems. (e.g. packaging on Linux/AIX, implementing various system and network services, general troubleshooting), implementing hosting infrastructure on Linux. (e.g. resource and availability monitoring, capacity planning, firewall framework) Consultant Designing and implementing solutions for automatic deployment of Linux clients, Point-Of-Sale systems, network services, clusters and big parallel storage systems for digital media projects, incl. Real Software, VRT, EVS, RVA, Callataÿ and Wouters, KBC

summer job 1996/1997 and Oct 1997 → Sep 1999 Consultant Analysis and design of an off-line website generation program (further developed as WebEngine) and web-scripting. Implementation of business projects. System administration Installation and operational management of Linux infrastructure and routers.

voluntary Oct 1996 → Nov 1997 Network administration Maintenance of 12 public Internet terminals (based on Windows 95) and an ISDN Internet connection. Internet training Individual training and training in group regarding computer use, the Internet, search-engines and popular websites.

Ability to learn quickly from self-study Thorough experience in Unix system administration and automation Thorough experience in configuring and deploying systems in a scalable and coherent manner Owner of various best practices regarding Linux system and application deployments, system maintenance and documentation, system security and Enterprise Linux in general. Experience in developing and marketing products using the Internet and Internet communities Experience in project-management and leading a technical team

Excellent knowledge of Linux (since 1994) incl. Red Hat Enterprise Linux, Scientific Linux, CentOS, Fedora (but also SLES, Ubuntu, Debian, …) Experience with various Unix systems including AIX, HP/UX and Solaris, mostly wrt. packaging, automation and troubleshooting. Experience with virtualization solutions incl. OpenVZ, RHEV/KVM and VMware ESX Thorough experience in designing and implementing a multi-customer monitoring and reporting infrastructure Experience with Red Hat kickstart, post-installation mechanisms for mass deployment and building Red Hat RPM packages Experience with clustered web-servers for load-balancing and fail-over, firewalling, virtual private networking (VPN), building high-capacity, load-balancing and high-available systems (IPVS), disaster recovery solutions and network intrusion detection systems (NIDS) Thorough experience in compiling, installing, and configuring of Unix system software, e.g. NFS, Samba, lpd (and LPRng), Postfix, Amavisd, Bind, DHCP, XFree86, Apache, ssh, ntpd, Snort, Dante, RRDtool, Nagios, Webmin, rear, KVM, … Experience with GPFS clustering and SAN environments for large digital media environments Experience with building solutions using SugarCRM and Drupal Experience automating and integrating with Red Hat Network Satellite Experience in programming and scripting in various computer languages Experience with various markup languages (HTML, SGML, DocBook v3 and v4, XML, CSS, AsciiDoc) CGI Programming (in Perl and C) and PHP3/4 IP (TCP/UDP), ICMP, ARP and protocols like IRC, FTP, SMTP, HTTP, NNTP, POP3, IMAP, DHCP, IPsec, … SQL (MySQL, msql, PostgreSQL, DB2 and some Oracle)

Active Python (since 2002), SQL (since 1997), PHP (since 1996), Javascript (since 1995), Bash and Unix shells (since 1994), C (since 1994), Perl (since 1994) Passive C# and Mono (2003 - 2005), RPG on AS/400 (1997 - 1998), Visual Basic (1997), Java (1996 - 1999), x86 Assembler (1992 - 1996), Pascal (1991 - 1999), Basic (1988 - 1990)

Dutch: native English: fluently spoken and written French: basic spoken and limited written German: notions

I have presented on various topics at a multitude of events, including the following conferences: Loadays, Antwerp, BE - 2012 FlossUK, Edinburgh, UK - 2012 LinuxCon Europe, Prague, CZ - 2011 LibreOffice Conference, Paris, FR - 2011 Japan Linux Symposium, Tokyo, JP - 2009 Jornadas Regionales de Software Libre, Buenos Aires, AR - 2008 LinuxTag Berlin, DE - 2008 LinuxWorld Expo Brussels, BE - 2008 LinuxWorld Expo Utrecht, NL - 2007 T-DOSE, Eindhoven, NL - 2007, 2008, 2009, 2010, 2011 Linuxconf.eu, Cambridge, UK - 2007 FrOSCon, Bonn, DE - 2007, 2008, 2009 FOSDEM, Brussels, BE - 2006, 2008, 2009

Red Hat Red Hat Certified System Administrator (RHCSA) Red Hat Certified Engineer (RHCE) in progress Red Hat Partner Platform Certified Salesperson (RHPPCS) Red Hat Partner Virtualization Certified Salesperson (RHPVCS) Red Hat Partner Middleware Certified Salesperson (RHPMCS) Linux Professional Institute LPI Certification Level 1 - Junior Level (LPIC-1) LPI Certification Level 2 - Advanced Level (LPIC-2) Brainbench Linux Administration (General): 4.71/5 (30 March 2005) #1 Belgium [> 99% of all participants] Linux Administration (Red Hat 9): 4.34/5 (30 March 2005) #2 Belgium [> 98% of all participants] Linux Administration (Red Hat): 3.93/5 (30 March 2005) #2 Belgium [> 96% of all participants] Linux Programming (General): 4.21/5 (30 March 2005) #1 Belgium [> 89% of all participants] Unix Administration (General): 4.53/5 (30 March 2005) #3 Belgium [> 94% of all participants]

IBM Redbook Residency, Poughkeepsie, NY (05/2005) Co-written a Redbook about the design and implementation of GPFS (General Parallel File System) in a digital media (broadcasting) environment. [SG246700] IBM Redbook Residency, Austin, TX (11/2002) Co-written a Redbook about the design and implementation of a Linux-based deployment in a branch banking environment. [SG246813]

XIOS Hogeschool Limburg, Diepenbeek (1996 → 1999) Applied Computer Science (~ Bachelor degree) Universiteit Hasselt, Diepenbeek (1994 → 1996) Computer Science, 1st year Heilig Hartcollege, Heusden-Zolder (1988 → 1994) Latin-Greek, Latin-Mathematics and Science-Mathematics

Maintainer of RPMforge RPM Repository with more than 5000 Open Source software RPM packages for RHEL, SciLinux and CentOS used by many international companies and organizations. Member of the ELRepo initiative providing kernel module packages (hardware drivers) used by many international companies and organizations using RHEL, SciLinux or CentOS. Author of various Open Source software projects incl. dstat, asciidoc-odf, unoconv, mrepo, dconf, sarah, wiipresent Contributor to various Open Source projects incl. Relax and Recover, asciidoc, docbook2odf, proxytunnel, scannedonly Ex-member of the CentOS core team Author of the FrOSCon LiveUSB used for informational displays and conference room computers