Availability and work interests My technical experience and interests as a system engineer and system architect focuses on Linux and Open Source software, preferably Red Hat Enterprise Linux (RHEL) and CentOS. Skills include deploying, migrating and managing large-scale Linux server and desktop environments, packaging Unix software, designing and implementing system tools and automating operational tasks using python, shell scripting and perl. I am available for contract work inside and outside of Europe, but not willing to relocate on a permanent basis.

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Personalia

Full name

Dag Johan Maarten Wieërs

Location

Ghent, Belgium

Phone

+32 478 436 299

Email

dag.wieers@gmail.com, dag@wieers.com

Website

http://dag.wieers.com/, http://dag.wieers.com/blog/

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Work experience

Dagit Linux and Open Source consulting // jun 2007 → present

Independent contractor

Available for contract work.

AXA-Tech Belgium // nov 2007 → mar 2009

Linux system engineer

Linux migration of Belgian datacenter to Germany. Reimplementation of modular deployment framework and infrastructure for Linux and VMware ESX. Design and implementation of development environment.

EMC Belgium Development Group // jul 2007 → dec 2007

Linux system engineer

Implementation of infrastructure for Novell SLES Linux deployment for technical development workstations. Integration with Active Directory, NIS, Clearcase, VMware Server.

Punch Telematix // jun 2007 → sep 2007

Linux system engineer

Design and implementation of technical documentation system. Design and implementation of subversion. Packaging for Novell SLES Linux. Troubleshooting. Automation.

Euroclear // dec 2005 → may 2007

Unix system engineer

Deployement 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.

IBM Belgium // jun 2001 → dec 2005

Unix system engineer

On Unix and Linux systems. (eg. packaging on Linux/AIX, implementing various system and network services, general troubleshooting)

Unix system developer

Implementing hosting infrastructure on Linux. (eg. 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. (broadcasting) incl. Real Software, VRT, EVS, RVA

Mind Linux Solutions // oct 1999 → apr 2001

Founder

Taking care of various parts of the organisation, including sales and marketing.

Business Unit manager

Experience with project-management and pre-sales 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.

IBM Belgium // internship feb 1999 → apr 1999 // sep 1999 → feb 2000

Internship

Implementation of a monitoring system and writing a paper called Platformonafhankelijk systeem voor dynamische websites under supervision of Erik De Cock.

Linux system engineer and developer

Implementation of a tool to automate the documentation of production systems and tracking changes on these systems. General sysadmin automation.

Quality control

Analyzing software problems and optimizing the program flow of an in-house ticketing system.

SISA Software/Winsome // summer job 1996/1997 // oct 1997 → sep 1999

Consultant

Analysis and design of an off-line website generation program (further developed as WebEngine) and web-scripting.

System administration

Installation of Linux-servers and routers and operational management of these systems.

Provinciale Bibliotheek Limburg // 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 about the Internet, search-engines and popular websites.

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Skills

Overall

• 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

• Experience in developing and marketing products using the Internet and Internet communities

• Experience in project-management and leading a technical team

Operating systems

• Excellent knowledge of Linux (since 1994) incl. Red Hat Enterprise Linux, CentOS, Fedora, SUSE, Ubuntu, Debian, Slackware and others…

• Experience with various Unix systems including AIX, HP/UX, Solaris, SCO Unix and Digital Unix.

• Experience with virtualization solutions incl. OpenVZ, VMware ESX and Xen.

• Knowledge of DOS, Windows 3.x, 95, 98, NT and XP (both as server as well as client in heterogenous networks).

Software

• Various markup languages (HTML, SGML, DocBook v3 and v4, XML, CSS)

• 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 and DB2)

• Experience with clustered web-servers for load-balancing and fail-over

• Experience with firewalling, virtual private networking (VPN), building high-capacity, load-balancing and high-available systems (IPVS) and network intrusion detection systems (NIDS)

• Experience with GPFS clustering and SAN environments for large digital media environments

• Experience with building Red Hat kickstarts for mass deployment and building Red Hat RPM packages

• Thorough experience in designing and implementing a multi-customer monitoring and reporting infrastructure.

• Thorough experience in compiling, installing, and configuring of Unix system software, e.g. NFS, Samba, lpd (and LPRng), Qmail, Bind, DHCP, XFree86, Apache, ssh, ntpd, Snort, Dante, RRDtool, Nagios, …

• Thorough experience in compiling, installing, configuring, and using almost any software from standard Linux-distributions, including XFree86, Gnome, Perl, rpm, …

• Experience in programming and scripting in various computer languages.

Programming languages

• Active: Python (since 2002), SQL (since 1997), PHP (since 1996), Javascript (since 1995), AWK & Unix-shells (since 1994), C (since 1994) Perl 4 and 5 (since 1994),

• Passive: C# and Mono (since 2003), RPG on AS/400 (1997 - 1998), Visual Basic (1997), Java (since 1996), Pascal (1991 - 1999), Tcl/Tk, Assembler (x86) (1992 - 1996), BASIC (1988 - 1990),

Languages

• Dutch (mothertongue)

• English (fluently spoken and written)

• Afrikaans (basic spoken)

• French (basic spoken and written)

• German (notions)

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Education

Technical writing

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]

Presentations

I have presented one or more items at the following conferences:

• T-DOSE, Eindhoven, NL (10/2008)

• FrOSCon, Bonn, DE (09/2008)

• Jornadas Regionales de Software Libre, Buenos Aires (08/2008)

• LinuxTag Berlin, DE (5/2008)

• Linuxworld Expo Brussels, BE (3/2008)

• FOSDEM, Brussels, BE (02/2008)

• LinuxWorld Expo Utrecht, NL (11/2007)

• T-DOSE, Eindhoven, NL (10/2007)

• FrOSCon, Bonn, DE (09/2007)

• Linuxconf.eu, Cambridge, UK (08/2007)

• FOSDEM, Brussels, BE (02/2006)

Certificates

Brainbench Certificates

• Linux Administration (General): 4.71/5 (30 March 2005) #1 Belgium [> 99% of all test takers]

• Linux Administration (Red Hat 9): 4.34/5 (30 March 2005) #2 Belgium [> 98% of all test takers]

• Linux Administration (Red Hat): 3.93/5 (30 March 2005) #2 Belgium [> 96% of all test takers]

• Linux Programming (General): 4.21/5 (30 March 2005) #1 Belgium [> 89% of all test takers]

• Unix Administration (General): 4.53/5 (30 March 2005) #3 Belgium [> 94% of all test takers]

Education

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

Congresses and workshops

• What The Hack in Boxtel, NL; July 2005

• FOSDEM 2002, 2003, 2005, 2006 and 2007

• Hacking At Large 2001 in Twente, NL; September 2001

• 7th and 8th International Linux Kongress August 2000 and November 2001

• LinuxTag 2000, 2001 and 2002

• Chaos Communication Camp in Berlin, DE; August 1999 and August 2003

• Hacking In Progress '97 in Almere, Flevoland, NL; August 1997

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Additional activities

• Member of the CentOS development team

• Maintainer of Dag RPM Repository with more than 4000 Open Source software RPM packages for RHEL and CentOS

• Author of various Open Source software projects incl. dstat, unoconv, mrepo, dconf, mrepo, sarah

• Author of various pieces of documentation

• Volunteer at FOSDEM and other community events

• Hobyist programmer, audiophile, cinephile, squash player, chess player and frequent Catan/Carcassonne player