Michael K.
DevOps, Linux Administrator, Infrastructure, Security
Experience
Apr 2019 - Present
6 years 6 monthsDevOps, Linux Administrator, Infrastructure, Security
ERGO / ITErgo
- Responsible for the installation, design, maintenance and further development of the server farm in both hardware and software
- Migration of live systems while minimizing downtime
- Handling tickets and changes in daily operations
- Documentation of changes and processes (Confluence)
- Test runs in the development environment
- Configuration and administration of Linux systems
- Configuration and administration of backup systems (Dell Networker, DataDomain)
- Administration of the Checkpoint firewall
Feb 2017 - Mar 2019
2 years 2 monthsCoordinator and Senior Administrator
Software house for patent systems
- Reorganization of the entire hardware and network structure in the data center
- Optimization of operating systems (Linux, Windows, Windows Server)
- Documentation of hardware and processes
- Creation of a dual monitoring system (Nagios/Zabbix)
- Creation of a backup structure and virtualization of the old environment (VMware vSphere 6.x)
- Optimization of the Oracle server structure including standby systems and RMAN backup structure
- Setup, porting and migration from Lucene to Elasticsearch (Elasticsearch Stack 6)
- Setup of an iSCSI storage environment and development of a test system
Mar 2013 - Apr 2013
2 monthsDesign, planning and implementation
Mr. Drevensek
- Analysis and planning of required resources
- Creation of the project plan
- System installation on servers including hardening (Debian 6.x)
- Definition and implementation of the permissions structure
- Adjustments of servers to the assigned services
- Configuration and administration of Apache 2.2 and PHP 5.4
- Creation and management of X.509 certificates
- Configuration and administration of Postfix, Courier, SASL, SpamAssassin, Amavis, MySQL client
- Configuration and management of the MySQL server
- Setup of the central load balancer/firewall
Mar 2012 - May 2012
3 monthsDesign, planning and implementation
Mr. Gödel
- Analysis and planning of required resources
- Creation of the project plan
- Installation of the operating system on servers including hardening (OpenSuSE 12.2)
- Setup of the Samba 3 domain and users with associated permissions
- Building the LDAP structure
- Adjustments of servers to the assigned services
- Integration of Windows clients into the domain
- Adding printers to the domain
- Training of the local administrator
- Setup of the firewall/VPN gateway to the Internet
Mar 2007 - Sep 2007
7 monthsConcept and hands-on programmer
Enovis Management
- Migration of the Webauction application from Solaris/Oracle/Tomcat to Linux Debian 5.0/MySQL 5.0/Tomcat 4.1/Java 1.4
- Analysis of the delivered source code and adjustments for the new operating system
- Changing database access from Oracle to MySQL and adjusting permissions
- Setup of development and production environments
- Documentation of changes and test runs in the development environment
- Configuration and administration of the web server Apache 1.2 and Tomcat 4.1
- Setup of the backup system
May 2003 - Apr 2018
15 yearsCoordinator and Senior Administrator
Alphatrust
- Administration and design of a web farm (25 servers)
- Responsible for installation, design, maintenance, and further development of the server farm in both hardware and software
- Migrating live systems with minimal downtime
- Monitoring the entire infrastructure
- Implementing different PHP versions and multiple web servers simultaneously on each server
Jan 1999 - Dec 2016
18 yearsISP Service Providing – Linux Services
Intetra Networking
- Building a data center in Unterschleissheim
- System and network administrator for a Linux server environment
Jan 1992 - Dec 1995
4 yearsSoftware – Archiving Solutions
Ush-Datentechnik
- Programming and installing archiving solutions based on Dbase/Clipper and Visual Objects
Jan 1987 - Dec 1992
6 yearsHardware
Skyline
- Manufacturing Amiga hardware (external hard drive)
- Producing client and server hardware based on individual requirements
- Installing and maintaining Novell networks on Arc and Ethernet
Summary
- Linux systems: System administration of Linux systems of various distributions in standalone and cluster/HA environments
- Several years of experience in network administration using Cisco and Brocade components
- 20 years of experience in Internet service providing
- Key user in Apache, SSL, Postfix/Sendmail, Bind9, MySQL and system security. Red Hat 7 and 8 including their derivatives, Debian up to version 10 including Ubuntu
- Very good knowledge of VMware 5.5 to 6.7, Docker and Podman, Kubernetes, Git, SVN, Subversion, Tomcat, Java 7/8, JBoss 7, Wildfly 8/10, Oracle Virtualization Manager
- Very good knowledge of scripting languages (Bash, Ksh, Perl, Python, Groovy)
- Good knowledge of programming languages (C, C++, Pascal)
- Very good knowledge of SCO Unix 3.2 / OpenServer 3.0
- Good knowledge of SUN / Oracle Solaris 9/10, BSD, MacOS
- Experience with HP-UX 10/11
- Experience with Matrix42, Confluence, Jira, PRTG, CheckMK, Grafana, Networker, Oracle DB 12c and 19c, Netscaler ADC VPX, Checkpoint R80.40, R81.10
- Basic knowledge of NetApp, DataDomain
Languages
German
AdvancedEnglish
IntermediateCertifications & licenses
Cisco Certified CCNA Routing And Switching
Cisco
Microsoft MCSE Windows NT
Microsoft
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