Manfred Schirmer - Senior System Engineer Linux

Recommended expert

Lautertal (Odenwald), Germany

Experience

Jan 2024 - Dec 2025

2 years

Frankfurt, Germany

Senior System Engineer Linux

DB InfraGo AG

Provisioning and updating virtual machines for the railway infrastructure.
Using VMware vSphere 6–8, Veeam Backup, Microsoft Active Directory, DNS, NPS, WSUS.
Utilizing Red Hat Satellite Server, rSyslog Server, Icinga2, Postfix, Tacacs, Ansible and Ansible Automation Platform.
Operating on HPE rack servers and HPE Synergy blade servers with Meinberg NTP servers, Brocade FC and Cisco Nexus 9000.

May 2023 - Dec 2023

8 months

Frankfurt, Germany

Senior System Engineer Linux

DB Netz AG

Provisioning and updating virtual machines for the railway infrastructure.
Managing VMware vSphere 6–8, Veeam Backup, Microsoft Active Directory, DNS, NPS, WSUS.
Deploying Red Hat Satellite Server, rSyslog Server, Icinga2, Postfix, Tacacs and Ansible.
Using HPE rack servers, HPE Synergy blade servers, Meinberg NTP servers, Brocade FC and Cisco Nexus 9000.

Mar 2023 - Jul 2023

5 months

Blomberg, Germany

Senior System Engineer Linux

PhoenixContact

Provisioning and updating Linux VMs for SAP application servers and SAP HANA instances.
Operating on VMware vSphere 7–8, Veeam Backup.
Using SLES for SAP 12–15.5, RHEL 7–9, Ansible, cfengine, as well as Microsoft ADS and DNS.

Jul 2022 - Jun 2023

1 year

Kiel, Germany

Senior IT-Systems Engineer Linux

CITTY Handelsgesellschaft

Analyzing, designing and implementing a new database and automation architecture.
Setting up a multi-master Galera cluster to consolidate all MariaDB instances.
Implementing Ansible-based automation.

Jan 2022 - Apr 2022

4 months

Karlsruhe, Germany

System Engineer Application Operations for Linux Systems

L-Bank

Setting up automated deployments for JBoss applications.
Operating ActiveMQ and applying security patches.
Monitoring and ensuring compliance with the Payment Card Industry Data Security Standard, including handling CERT alerts and crypto alerts.
Using Nginx, Apache, JBoss, Wildfly, Ansible, Git, Red Hat AMQ, Artemis and Bash.

Nov 2021 - Jul 2022

9 months

Böblingen, Germany

System Engineer Application Operations Linux Systems

DXC Technology

Maintenance of JBoss applications and their installation at customers in the public sector.
Use of DXC Webscan, JBoss, Ansible, XML, Active Directory, SSO, Oracle 19, PostgreSQL, and Check_MK.
Ensuring stable application operations on Linux systems.

Jul 2021 - Dec 2021

6 months

Frankfurt, Germany

System Engineer Linux Systems

ING

Automation of OS upgrades for Linux systems.
Support for SAP HANA migrations and applying security updates.
Use of RHEL 7 and 8, SAP HANA, Ansible, Bash, Python, Git, VMware ESXi, Veeam Backup, and Check_MK.

Jul 2021 - Sep 2021

3 months

Berlin, Germany

System Engineer Application Operations Linux Systems

Deutsche Rentenversicherung Berlin Brandenburg

Automation of JBoss and Wildfly servers.
Use of Apache, Tomcat, Wildfly, Bash, and Git to meet application operation requirements.

Feb 2020 - Jun 2021

1 year 5 months

Bochum, Germany

System Engineer Application Operations Linux Systems

Knappschaft Bahn See

Automation and operation of web and application servers.
Use of SUSE SLES 12, Apache, Tomcat 9, Wildfly, WebSphere, Subversion, Git, ActiveMQ, Bash, Zsh, Ansible, Automic, and Python.

Oct 2019 - Dec 2025

6 years 3 months

Heidelberg, Germany

System Engineer Linux Systems

European Media Laboratory

Automation and operation of web and application servers in a research and development environment.
Use of OpenShift, Docker, Ansible, and Python for container and configuration management.
Operation of Red Hat Enterprise Linux 6–8, Debian 9 and 10, Ubuntu 18.04 and 20.04.
Use of Bash, Git, Apache, Nginx, Tomcat 8, and Wildfly.

Oct 2019 - Jan 2020

4 months

Koblenz, Germany

System Engineer Application Operations Linux Systems

Debeka

Automation and operation of web and application servers.
Use of OpenShift, Docker, SLES 12 and 15, Ubuntu 18.04, Bash, Apache, Nginx, Tomcat and Wildfly.
Use of Puppet, Puppet Bolt, Ansible and Python for configuration and deployment automation.

Aug 2019 - Dec 2019

5 months

Troisdorf, Germany

System Engineer SAP Systems

BwFuhrparkService GmbH

Automation and operation of web and application servers in an SAP environment.
Use of SuSE Linux Enterprise Server 12 and 15, Bash, Ansible and Python.

Jan 2019 - Oct 2019

10 months

Wiesbaden, Germany

System Engineer Application Operations Unix Systems

Schufa Holding AG

Automation and operation of web and application servers in the financial services environment.
Use of OpenShift, Docker, Ansible, Python, RedHat Enterprise Linux 6 and 7, Solaris 10, Bash and Korn Shell.
Operation of Apache, Nginx, Tomcat and Wildfly.

Oct 2017 - Oct 2018

1 year 1 month

Nuremberg, Germany

System Engineer Middleware, Monitoring

Consorsbank

Installation, automation and operation of web application servers.
Installation and customization of monitoring checks and setup of DevOps pipelines.
Use of RedHat Enterprise Linux 6 and 7, Bash, JBoss Enterprise Application Platform, Tomcat, Apache web server, ActiveMQ, Jenkins, Ansible, Python, Icinga2, Subversion and Git.

Mar 2016 - Dec 2018

2 years 10 months

Munich, Germany

System Engineer Application Operations Unix Systems

finanz informatik technologie service

Installation, automation and operation of web application servers.
Implementation of identity and access management, including integration with LDAP servers.
Planning and implementation of a sudo concept and rollout of sudo roles.
Use of RedHat Enterprise Linux 6 and 7, Solaris 10, Bash, Korn Shell, JBoss 6 to Wildfly 9, WebSphere WAS, Apache web server, Ansible, SAS, LDAP servers and clients, and Python.

Feb 2016 - Feb 2017

1 year 1 month

Nuremberg, Germany

System Engineer Middleware, Linux, z/OS

Sparda Datenverarbeitung e.G.

Installation, automation and operation of web application servers on Linux and z/OS platforms.
Use of RedHat Enterprise Linux 6 and 7, SUSE SLES 11, SLES for System z, JBoss 6 to WildFly 10, WebSphere WAS, Liberty and Portal.
Use of Apache web server, Puppet, Ruby, Hiera, Subversion, Jenkins and Git.

Aug 2015 - Jan 2016

6 months

Karlsruhe, Germany

System Engineer for Linux Production Systems

Filiadata / dm-drogerie markt

Automation of installations and highly available operation of complete environments (web stack, application servers).
Use of RedHat Enterprise Linux 6 and 7, JBoss 6 to WildFly 9, Tomcat 6 and 7, Apache web server, Nginx web server, Varnish and reverse proxies.
Use of Puppet, Hiera, Ruby, Perl, Foreman, Keepalived, Tanuki, Icinga2, Jolokia, Jmx4Perl, Percona and Galera Cluster.

Jan 2015 - Jul 2015

7 months

Frankfurt, Germany

System Engineer

DZ Bank AG

Installation and highly available operation of Apache, JBoss and Tomcat applications.
Use of RedHat Enterprise Linux 6 and 7, Solaris 10 and 11, ZFS, JBoss 4 to 7, Tomcat 5 to 7, Apache web server and reverse proxies.
Use of WatchIT, UC4, RedHat Satellite 5 and 6, and Perl.

Apr 2014 - Dec 2014

9 months

Germany

System Engineer

IBM Global Business Services

Installation and highly available operation of Apache, JBoss and WebSphere environments.
Third-level support for complex Linux application landscapes.
Use of RedHat Enterprise Linux 5 and 6, JBoss, Tomcat, WebSphere, Apache and Kerberos.
Use of a configuration and deployment framework in Bash and Perl.

Sep 2012 - Mar 2014

1 year 7 months

Ingolstadt, Germany

Systems Design Engineer

Media-Saturn IT-Services

Installation and highly available operation of JBoss, Tomcat and ColdFusion environments on Linux.
Operation of Oracle clusters on virtual and physical servers.
Relocation of a data center, setting up operations management and implementing Nagios monitoring.
Use of SUSE Linux Enterprise Server, VMware, JBoss, Tomcat, WebSphere 8.5, Apache, Kerberos, AppDynamics, ColdFusion 9, Nagios, Munin, Cacti and F5 load balancer.

Jun 2012 - Sep 2012

4 months

Raunheim, Germany

Systems Design Engineer

Sybase 365

Installation and highly available operation of JBoss and Tomcat environments on Linux.
Operation of Oracle clusters and troubleshooting.
Use of RedHat Enterprise Linux, VMWare, Kickstart, JBoss 6 and 7, Tomcat, Apache, Apache mod_jk load balancer, Bash, Oracle, Perl, Python, and Kerberos.

Sep 2011 - Jun 2012

10 months

Karlsruhe, Germany

Linux System Administration and Tomcat/JBoss Operations

ORGA GmbH

Installation and highly available operation of JBoss and Tomcat environments on Linux.
Operation of Oracle clusters.
Use of RedHat Enterprise Linux, PXE boot, VMWare, JBoss 4 and 5, Tomcat, Apache, Bash, and Oracle.

Jul 2011 - Feb 2012

8 months

Düsseldorf, Germany

Linux System Administration (JBoss)

IT.NRW

Installation and highly available operation of Oracle RAC, JBoss, and Apache load balancers on Linux servers.
Use of RedHat Enterprise Linux, AppDynamics, OpenLDAP, Puppet, Chef, Perl, PHP, Kerberos, VMWare, JBoss 5 and 7, Tomcat, Apache, Bash, Python, and Fabric.

Jan 2011 - Jun 2011

6 months

Bonn, Germany

Linux System Administration

Deutsche Post AG

Installation and operation of Linux servers for a complex web software test environment.
Installation and management of local firewalls with automated configuration using Puppet.
Use of hardware from HP, Cisco, and NetApp.
Use of RedHat Enterprise Linux, Ubuntu Linux, OpenLDAP, Puppet, Perl, PHP, VMWare, OpenVZ, JBoss, Tomcat, Postfix, Bash, as well as Windows Server, Exchange, and Lotus Domino.

Sep 2010 - Dec 2010

4 months

Heusenstamm, Germany

Linux System Administration

ITSG Informationstechnische Servicestelle der gesetzlichen Krankenversicherung

Installation and highly available operation of Linux and Windows servers in healthcare.
Deployment of Java software.
Use of hardware from HP, Fujitsu, and NetApp.
Use of Suse Linux, Ubuntu Linux, OpenLDAP, Perl, VMWare, JBoss, Tomcat, Windows Server 2003 and 2008, and MS SQL Server 2005 and 2008.

May 2010 - Aug 2010

4 months

Wiesbaden, Germany

Linux System Administration

HZD Hessische Zentrale für Datenverarbeitung

Installation and operation of Linux servers in the public sector.
Operation of Oracle Application Server.
Design and implementation of a Nagios monitoring system.
Usage of Fujitsu hardware.
Use of Suse SLES 9–11, OpenLDAP, Perl, shell scripts, Oracle 10, Nagios, Icinga, VMWare, JBoss, Tomcat, and Windows Server 2003 and 2008.

Jan 2010 - Apr 2010

4 months

Eschborn, Germany

Unix System Administration

Vodafone

Installation and highly available operation of Unix servers and cluster systems according to ITIL.
Integration of SAN storage and Oracle databases.
Use of hardware from HP, IBM, and EMC Clariion and Symmetrix.
Use of HPUX 11, ServiceGuard, AIX, HACMP, Linux (RHEL 3 and 5), OpenLDAP, Perl, Oracle, and Nagios.

Feb 2008 - Dec 2009

1 year 11 months

Frankfurt, Germany

Unix System Administration

UBS AG

Installation, operation, and backup/restore of Unix servers and cluster systems in a global team.
Setup, operation, and relocation of a data center.
Execution of change management and incident management according to ITIL.
Use of hardware from Sun, StorageWorks, Quantum, HP, Fujitsu Siemens, IBM, NetApp, Hitachi, EMC, Brocade, and Cisco.
Use of Solaris 10, HPUX 11, AIX, Linux (RHEL 3 and 5), Mac OS X Server, NetCool System Monitoring, Veritas Storage Foundation, Veritas NetBackup, ARS Remedy, HP OpenView, Oracle 10, MC/ServiceGuard, NIS, Kerberos, LDAP, and DNS.

Aug 2007 - Dec 2007

5 months

Frankfurt, Germany

AIX System Engineer for IBM p-Series branch servers

Dresdner Bank

Support and administration of AIX systems for IBM p-Series branch servers.
Use of IBM p-Series hardware and SAN storage.
Use of AIX 4.3 and 5.3 as well as development tools and BFF packaging tools.

Apr 2007 - Aug 2007

5 months

Oberhausen, Germany

Unix System Administration

MAN Turbo AG

Operation of HP clusters for CAD design.
Administration of IBM p-Series servers for SAP.
Operation of a Linux high-performance cluster for flow calculations.
Use of IBM p-Series and HP servers (RISC and Intel Itanium failover clusters) as well as SAN storage.
Use of AIX 4.3 and 5.3, SAP Basis administration, RHEL 3 and 4, HPUX 11, MC/ServiceGuard, I-Deas CAD software, and Nagios monitoring.

Aug 2006 - Mar 2007

8 months

Bielefeld, Germany

Network administration and system programming

AWEK Mikrodata

Administered the network infrastructure for a software company.
Did system programming for client environments.
Used Intel servers, Cisco routers, and HP ProCurve switches.
Worked with Windows Server 2003, Linux servers (Debian 3, SLES 10), VPN, firewall (IPTables), Samba, Apache, JBoss, Tomcat, Postfix, and SNMP.
Performed Linux kernel adjustments and set up automatic installation routines.

Jul 2006 - Jul 2006

1 month

WLAN installation

Planning and installing a WLAN access point infrastructure.
Using Cisco Linksys WRT 54G hardware.
Configuring WEP/WPA security mechanisms.

Jun 2006 - Jun 2006

1 month

VoIP router installation

Installed a VoIP router to provide internet connection for network and telephony.
Used a FritzBox Fon 5050.
Configured firewall functions.

May 2006 - May 2006

1 month

Tuning for Sun T1 multithreading systems

Tuned application software for the CoolThreads technology of Sun SPARC T1 servers.
Used Sun UltraSPARC T1 (T1000 and T2000) hardware.
Worked with Solaris, Apache, Sendmail, MySQL, Oracle, JBoss, and Tomcat.

Apr 2006 - Apr 2006

1 month

OpenSolaris installation and administration on Intel hardware

Installed and administered OpenSolaris on Intel servers.
Ran services like Sendmail, Postfix, and Apache on OpenSolaris 11.

Jul 2005 - Nov 2005

5 months

Administration of HP OpenView Data Protector on HPUX cluster

Managed online backups for Oracle databases and transaction logs using a complex backup schedule.
Stabilized the automated backup process.
Trained Oracle DBAs to resolve minor issues.
Worked with HP support to fix hardware and software issues.
Used HP 9000 N-class and A-class clusters, HP VA7410, Cisco Catalyst 3750G switches, Brocade SAN switch, and HP SureStore tape library.
Used HP-UX 11i, HP OpenView, HP Data Protector, and Oracle RMAN.

Jul 2005 - Jul 2005

1 month

Installation of HP OpenView Data Protector on HPUX cluster

Replaced the existing OmniBack software with HP Data Protector.
Migrated extensive backup logs.
Set up an HP tape robot.
Set up automated email alerts.
Used HP 9000 N-class and A-class clusters, HP VA7410, Cisco 3750G/3560/2960 switches, Brocade SAN switch, and HP SureStore tape library.
Used HP-UX 11i, HP OpenView, HP Data Protector, and Oracle RMAN.

Jun 2005 - Jun 2005

1 month

Installation of Oracle 9 for the development department

Built a test database for software development and simulated billing runs.
Used Intel server hardware.
Used Oracle 9, JBoss, Tomcat, and Java.

Jun 2005 - Jun 2005

1 month

Software development for online data service

Developed a solution for bidirectional data transfer over the Internet.
Used Perl, Java, WebDAV, and XML.
Ran on Apache and Tomcat.

May 2005 - May 2005

1 month

Installation of a Scientific Linux server

Installed a server with Scientific Linux as a free RHEL clone.
Used Intel server hardware.
Configured DNS, DHCP, firewall, Apache, MySQL, Squid, Samba, and Postfix.

Apr 2005 - Apr 2005

1 month

NFS Administration

Setup of automount connections via NFS.
Use of HP9000 and Intel servers.
Use of HP-UX, Linux, NFS and automount.

Apr 2005 - Apr 2005

1 month

Nokia Firewall Hardware Replacement

Replacement and migration of Nokia firewall hardware.
Taking over and extension of existing firewall settings.
Use of Nokia 500s, Nokia Firewall and Cisco PIX 520.
Use of FreeBSD and CheckPoint FireWall1.

Mar 2005 - Mar 2005

1 month

Citrix Client Rollout

Rollout to update all Citrix clients to version 8.
Use of an Intel server farm for about 1200 workstations and Cisco Catalyst 3750G switches.
Use of Citrix and Windows 2003 Server.

Mar 2005 - Mar 2005

1 month

SUSE Cluster

Setup and commissioning of a high-availability server for a software development department.
Support for software testing and nightly builds.
Connection of the server to the backup system.
Use of FSC Primergy RX300, FSC FibreCAT S80 and Cisco Catalyst 3560 switches.
Use of SUSE SLES9, Heartbeat, Perl, Java SDK, PaperCut, Phorum, Apache, Bugzilla, Webmin, HP Data Protector and Oracle.

Feb 2005 - Feb 2005

1 month

ADS Data Entry

Addition and maintenance of user data in Active Directory.
Adjustment of existing permissions to a new file server directory structure.
Use of Intel servers with Windows 2003 Server and ADS.

Feb 2005 - Feb 2005

1 month

Expansion of Big-Brother Network Monitoring

Adding new servers and network services to the Big-Brother monitoring system.
Extending the user menu using JavaScript.
Creating and displaying throughput statistics with MRTG.
Integrating Java-based remote consoles.
Implementing status notifications via email using Perl scripts.
Using Intel servers, Sun SPARC servers, HP 9000 RISC servers, diesel generator, and surveillance cameras.
Working with BigBrother, Apache, PHP, Java, JavaScript, MRTG, Postfix, and Perl.

Feb 2005 - Feb 2005

1 month

Expansion of Access Control

Installing new access terminals to expand access control.
Using Interflex IF 600/610 hardware.

Feb 2005 - Feb 2005

1 month

HP VA7400 Firmware Update

Applying new firmware to the disk controller and disks of an HP VA7400.
Using HP 9000 N-class clusters, A-class systems, HP VA7410, and Brocade SAN switch.
Working with HP-UX 11i, cluster packages, HP OpenView, HP Data Protector, and Oracle RMAN.

Feb 2005 - Feb 2005

1 month

Development Server Installation

Setting up and commissioning a development test server for software testing and nightly builds.
Implementing status notifications via email using Perl scripts.
Using FSC Primergy RX100.
Working with SUSE SLES 9, Java SDK, Perl, Apache, JBoss, and Tomcat.

Feb 2005 - Feb 2005

1 month

Software Development for Periodic Data Retrieval at a Wholesaler

Developing scripts for periodic data retrieval from a wholesaler.
Adjusting firewall rules and generating notification emails using a Perl script.
Working with HP-UX, Linux, NFS, FTP, iptables, wget, shell scripts, and Perl.

Jan 2005 - Nov 2005

11 months

Gefrees, Germany

Mail System Administration

VSA ApothekenSysteme GmbH

Operation of an internal mail system based on Microsoft Exchange and mail proxies with a redundant setup.
Use of Intel server clusters, SAN storage systems, F5 BIG/IP load balancers, Cisco Catalyst 2960 switches, and Cisco PIX 520 firewall, as well as redundant internet connection.
Use of Exchange 2003, Postfix, Apache, and Trend Micro Virus Wall, as well as greylisting and spam-filter mechanisms.

Jan 2005 - Jan 2005

1 month

Exchange Mail Cluster Administration

Setup and commissioning of an Exchange 2003 mail cluster.
Migration of existing mailboxes to the new cluster platform.
Use of FSC Primergy RX300, FSC FibreCAT S80, and Cisco Catalyst 2960 switches.
Use of Windows Server 2003 Cluster Server and Exchange 2003.

Jan 2005 - Jan 2005

1 month

Java ERP Software Development

Development of Java software modules for an ERP system.
Connection of cash register printers and card readers.
Use of Eclipse 3, Tomcat, and JBoss.

May 2002 - Sep 2005

3 years 5 months

Solaris Server Administration

Ensuring availability and functioning of Solaris servers.
Implementing user authentication via PKI for a web portal.
Supporting software development in the PKI environment.
Use of SPARC servers and Solaris.

Jan 2002 - Nov 2005

3 years 11 months

Munich, Germany

HP Cluster / Oracle Database System Administration

VSA GmbH

Ongoing administration of an HP cluster and an Oracle database system.
Troubleshooting and enhancement of the hardware infrastructure.
Use of HP 9000 N-class clusters, A-class development servers, HP VA7410, Cisco Catalyst 6509 and 3750G switches, Brocade SAN switch, and HP SureStore tape library.
Use of HP-UX 11i, MC/ServiceGuard, HP OpenView, Oracle, and SuSE Linux Enterprise Server 9.
Operation of JBoss, Tomcat, and Java application software.

Skills

System Administration: Red Hat Enterprise Linux 4.0 Up To 10, Suse Linux Enterprise Server Up To 15, Debian 8 To 12, Ubuntu Up To 24.04, Alma Linux 8 Up To 10, Rocky Linux 8 Up To 10, Aix, Hp-ux, Vmware Esxi Vsphere 4 To 7, Proxmox 6 And 7, Solaris 8 To 11, Sco Unix, Netbsd, Freebsd, Openbsd, Nanobsd, Novell Netware, Os/2, Citrix Server/cluster, Microsoft Windows Server 2003 Up To 2022, Active Directory, Openldap, Ucs, Zfs, Veritas Netbackup, Sendmail, Postfix, Veritas Volume Manager, Cluster File System
Programming Languages: C, Java, Pascal, Go, Perl, Python, Ruby, Shell (Sh, Ksh, Bash)
Methods/tools: Ansible, Ansible Tower/awx, Ansible Automation Platform, Puppet, Puppet Bolt, Hp Openview, Mc/serviceguard, Mcafee Epolicy Orchestrator, Openvz, Hp Quality Center, Rhn, Red Hat Satellite 5 And 6, Kickstart, Ads, Pxe-boot, Itil Process, Pci Dss (Payment Card Industry Data Security Standard)
Databases: Mysql Up To 8.x, Mariadb Up To 11.x, Oracle 9i Up To 19c, Ms Sql Server Up To 2019, Postgresql Up To 15.x
Networking: Lan, Wan, Tcp/ip V4 And V6, Nis, Nis+, Nfs, Dns, Dnssec, Ldap, Snmp, Dhcp, Carp, Haproxy, Sendmail, Postfix, Imap, Ssl, Qualys Ssl Labs, Kerberos
Hardware: Sun Sparc Servers, Sun Blade, Sun Fire, Ultrasparc-t2, Ultrasparc T4, Ibm Rs/6000, Pseries, Iseries, Brocade San Switches, Hp 9000 A- And N-series, Hp Surestore Tape Libraries, Hp Va7410 Rack And Blade Servers (Hp, Dell, Siemens, Ibm), Cisco 650x, 5x00, 37xx, 35xx, 29xx, Pix520
Web Technologies: Apache Httpd, Tomcat 5 Up To 10, Nginx, Load Balancing, Jboss Eap 4 Up To 8, Wildfly 8 Up To 27, Ibm Websphere, Apache Felix, Activemq, Artemis
Monitoring: Nagios, Icinga, Icinga2, Check Mk, Zabbix, Splunk, Cacti, Jolokia, Hp Openview, Tivoli, Elk