Resume
Resume
Person
I am a very committed person who has an incredible curiosity with everything IT-related - whether it being technical, philosophical, humanistic, legal or thinking outside the box.
I've been around a lot of platforms and worked as a user, programmer, consultant and administrator. Combined it has given me a unique insight into the general use of IT, and has often helped me both to understand the problems, get ahead of them and be able to switch between them.
I have previously been self-employed for a number of years (hardware sales) and am familiar with the full spectrum of business understanding. Many of the applications that I have helped to develop has required knowledge and understanding of financial management.
My big interest and hobby is on the system-administration side.
Skills
Linux
- Distributions: Debian / Ubuntu, Redhat / Centos, Gentoo
- Mail Server: Postfix, exim, qmail and sendmail
- Spam Scanning: MailScanner, spamassassin, amavisd and in-house developed
- Web Server: Apache, lighttpd, nginx
- DNS: Bind (with geo-aware setup for redelegation of traffic to different backends depending on location)
- Backup: Bacula, rdiff / rsnapshot, scripting
- VPN: OpenVPN, IPSec, PPTP, StrongSwan
- Virtualization: XEN, KVM, vmware
- Database: Postgresql, sqllite, DB2 and MySQL/MariaDB (with 3-node Galera setup with master-master functionality)
- IP Telephony: Asterisk / FreePBX
- Storage: CORAID, iSCSI, AoE, LVM, Ceph
- Failover / redundancy: GlusterFS, Keepalived, Corosync, Pacemaker
- Loadbalancing: ZEN, HAProxy, Varnish, DRBD
- VCS: SVN, git, mercurial & perforce
- Cloud: Amazon, OpenNebula, OwnCloud
- Search: Solr
- Deployment: 3-tiered deployment (testing, staging, production and failover / LB / scaling)
- Build Engineering: CI (Continuous Integration) with TeamCity, Jenkins and Buildbot and configuration of build farms in a virtual environment with a mix of operating systems.
- Monitoring: Munin, Icinga (Nagios spinoff), Shinken
- Log analysis: Scripting, logstash, loganalyzer
- Troubleshooting:
- Hardware (practical knowledge - all levels)
- Applications (netstat, strace, dtrace, lsof, gbd)
- Network (netstat, tcpdump, wireshark, strace, lsof)
- Optimization of OS/apps looking at vmstat, iostat, kernel configs and balance between cpu/ram.
- Profiling bottlenecks
- Automation software: puppet, salt stack, chef
Development / scripting
As a programmer I've worked with:
- Perl
- Bash
- Web
- PHP
- Javascript / JQuery / AJAX
- Setup and maintenance of open source CMS (SilverStripe, TYPO 3 (ver 3 and 4), Drupal, Concrete5, joomla)
- Setup and maintenance of eCommerce (osCommerce, Magento)
- Java / Tomcat
- Delphi
- . NET (primarily C # and C++) and mono
- Python
- Lua
- C (understand the language, but will almost always choose either bash/perl/python for a job)
Professional life
I have been widely used as an [internal] consultant to find problems / solutions and generally used for sparring in all layers / aspects of the companies I've worked in.
For my earlier (and current) work experience, there is a link to linkedin at the end of this page.
Family and sparetime
Family-wise, I have a wife and two children (two boys). In my free time I like to bike & experiment with new technologies.
I am lucky to have a good fiber connection @ home and runs various mirrors for open source projects. It is often here I test a new idea (gfs, iscsi, aoe, failover / clusters, ceph) - before I start to implement in testing and finally to implement in production.
I relax the best by reading/researching new technologies/areas and generally just testing myself with various scenarios.
Contact info
Name: Martin B. Nielsen Location: Denmark Email: martin@skytech.dk
Links / more info
| Media | Link |
|---|---|
| [WIKI] - Linux projects/research | Linux |
| [WIKI] - Development projects/research | Development |
| https://twitter.com/zethrok | |
| http://www.linkedin.com/pub/martin-b-nielsen/8/4/743 | |
| https://www.facebook.com/jinx42 | |
| IRC | Find me as user Zethrok on these networks: OFTC, EFNet, Freenode, Mozilla |