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 coupled with automation (saltstack), CI deployments, scalability and high availability.

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)
• Storage: iSCSI, LVM, Ceph
• Failover / Loadbalancing: Keepalived, HAProxy, Varnish
• VCS: SVN, git and mercurial
• Cloud: AWS and GCE
• Search: ELK (Elasticsearch, Logstash, Kibana)
• 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, Zabbix
• Log analysis: Scripting, logstash, loganalyzer
• Troubleshooting:
  • Hardware (practical knowledge - all levels)
  • Applications (netstat, strace, dtrace, lsof, gbd, pmap)
  • 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: salt stack

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)
• Python
• Lua

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 three children (3x 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 _at_ skytech.dk

Links / more info

Media	Link
[WIKI] - Linux projects/research	Linux
[WIKI] - Development projects/research	Development
Twitter	https://twitter.com/zethrok
LinkedIN	http://www.linkedin.com/pub/martin-b-nielsen/8/4/743
Facebook	https://www.facebook.com/jinx42
IRC	Find me as user Zethrok on these networks: OFTC, EFNet, Freenode, Mozilla