Operational optimization – stabilization of system and application operations
System administration in a Linux environment with WebSphere Application Server and DB2 databases
Creation of concepts to resolve production-related errors in the ticketing system based on an as-is analysis
Setup, configuration, and deployment of test environments according to concept
Execution of error analyses and troubleshooting in WebSphere (Java) and MQ servers
Creation of benchmarks to compare specified performance with current performance
Creation of releases and release updates
Technical documentation
Jan 2020 - Dec 2022
2 years
System Consultant
Finanz Informatik Technologie Service
System administration of LINUX/UNIX systems
Handling of customer orders in the UNIX server environment
Incident, problem, and change management according to ITIL
Incident resolution at third- and second-level support for operating systems and server provisioning
Participation in projects
Support of applications and their infrastructure
Setup of a Kubernetes environment for ABACUS 360
Aug 2020 - Oct 2020
3 months
IAM Architect
Stadtwerke München
Creation of a concept for a new Identity Management System based on One Identity
Mentoring on the necessary measures for the migration
Jun 2019 - Mar 2020
10 months
System Consultant
IDnow GmbH
Professional services
Development of custom client adaptations in Java and deployment in Kubernetes/Docker
Assisting IDnow customers with integration using REST APIs
Gathering customer requirements and consulting on API usage
Creating customer configurations, versioning and deploying configurations via GitHub and Jenkins
Querying customer-specific data in the MySQL database
Feb 2019 - May 2019
4 months
System Consultant
IS4IT GmbH / UniCredit Group / VTS
Migration of UniCredit Group internet platforms in Apache Webserver and Tomcat/JBOSS to new platforms
Setup and configuration of middleware Apache HTTP Server and JBOSS on various RedHat Linux versions
Securing web presences by hardening deployed middleware
Client consulting on internet presences
Certificate management
Advising the client on highly available and high-performance web presences
Automation of operational processes
Oct 2018 - Dec 2019
3 months
System Consultant
KOGIT GmbH / Deutsche Börse Group
Identity Management with SailPoint IdentityIQ
Gathering requirements, specification, and implementation of the 'Leaver' process
Implementation of the 'Leaver' process in Java and BeanShell
Optimization of LDAP and ForgeRock Directory Services integration
Jul 2013 - Jul 2018
5 years 1 month
Identity Management Architect
Oracle / European Central Bank
Functional responsibility for the Identity Manager installation with integrations to Active Directory, LDAP (Oracle Unified Directory - OUD), Oracle databases, and Microsoft Exchange
Further development of the web services interface to SAP in Java
Definition of additional functionalities
Development of a Java-based connector for SCIM (System for Cross-domain Identity Management)
Integration of Microsoft Exchange (2010 + 2016) with Oracle Waveset
Single Sign-On integration with Windows Desktop
Integration of the installation with Kerberos for UNIX/Solaris
Administration of installations on Glassfish and Oracle WebLogic
Analysis and resolution of errors and open tickets
Apr 2013 - Jun 2013
3 months
System Consultant
Cellent / O2
New FN-LDAP Directory Server (OpenLDAP-based)
Definition of the LDAP schema
Specification and implementation of security requirements
Functional point of contact for directory server users during the migration phase
Creation of Java code examples demonstrating password policy usage
Documentation
Creation of LDAP test scripts
Feb 2013 - Apr 2013
3 months
System Consultant
iC Consult / ING DiBA
Extension of an Oracle Waveset installation
Consulting in the area of Oracle Waveset IDM
Expansion of the system with new Java modules
Analysis and resolution of errors and open tickets
Implementation of changes
System documentation
Configuration of the WebLogic environment and deployment of customizations
Jan 2010 - Dec 2013
2 years
System Consultant
Allianz SE / Allianz Common Applications and Services GmbH
Administration of Risk Analysis Infrastructure
Concept and design of infrastructure on RedHat Linux
Development of scripts for RedHat Enterprise Linux
Administration of application databases based on Oracle 10.x and 11.x
Installation, configuration, and setup of system components for Risk Analysis Infrastructure (comprising server applications and JEE web applications)
Administration of the complete Algorithmics Algo Suite
Deployment and administration of frontend web applications on WebSphere Application Server
Analysis and implementation of the project 'Setup ITSM for Solvency II'
Server monitoring, system tuning, script development, job scheduling
Execution of incident, problem, and change management processes
Support of the business unit
Sep 2010 - Mar 2013
2 years 7 months
Switzerland
System Consultant
Kanton Aargau (Schweiz)
Support for Sun Identity Manager (day-wise)
Assistance in setting up an SVN and NetBeans-based development environment for Sun Identity Manager
Setup of an SPML2 interface for provisioning eGovernment users and development of new workflows
Support in resolving issues with Identity Manager customizations
Integration of resources: Microsoft Active Directory, Sun Directory Server, and various databases
Development of a Java interface
Sep 2010 - Dec 2010
4 months
System Consultant
Fujitsu Services GmbH
Linux application migration
Analysis of the existing application landscape across multiple data centers
Installation, configuration, and migration of applications to the new server landscape
Inventory of applications and adjustment of the application overview
Analysis of network traffic including protocols used between applications
Analysis of configuration and necessary adjustments for migration
Analysis of current infrastructure/dependencies on other systems
Development of a migration strategy
Definition of acceptance criteria after application migration in coordination with the client
Synchronization of migration schedules
Execution of test migrations
Definition of a fallback strategy
Functional testing of test migrations
Migration of applications including adjustments to Quest Vintela Authentication Service for integration with Microsoft Active Directory
Migration support during the first week post-migration
Nov 2009 - Jun 2010
8 months
System Consultant
dwpBank (Deutsche WertpapierService Bank AG)
Implementation of Sun Identity Manager extensions
Replacement of existing Lotus Notes-based workflows with newly developed workflows in Sun Identity Manager
Development of Java modules to extend Sun Identity Manager functionality
Support for upgrading the existing Sun Identity Manager installation to version 8.1
Installation and configuration of Glassfish Application Server
Integration of the new office desktop infrastructure with Identity Manager
Sep 2009 - Oct 2009
2 months
System Consultant
DZ Bank
Upgrade of Sun Identity Manager
Upgrade of an existing Sun Identity Manager installation to the current version
Installation and configuration of Oracle WebLogic in various environments
Adaptation of the Oracle database to meet Sun Identity Manager requirements
Adaptation of existing customizations to the new version
Cleanup of no longer required components
Apr 2009 - May 2010
1 year 2 months
System Consultant
T-Systems
Architectural support in the implementation of an identity management solution
Assistance in developing the solution based on Sun Identity Manager
Review of the planned solution architecture
Consulting on technical product details
Development of a 'Sounds Like' search for names
Jan 2009 - Apr 2009
4 months
System Consultant
Rohde & Schwarz
Setup of an LDAP infrastructure and integration with Sun Identity Manager
Support in integrating SAP HCM
Architecture, design, planning, and installation of Sun Java Directory Server
Integration of the new LDAP server with Sun Identity Manager
Design of the LDAP directory schema
Nov 2008 - Dec 2009
2 months
System Consultant
Sun Microsystems GmbH
Support for Vodafone/network planning pilot
Architectural consulting for integration of EAI and web services with identity management and Single Sign-On (SSO)
Setup of a proof of concept with OpenSSO
Oct 2008 - Oct 2008
1 month
System Consultant
GfK
Support for LDAP Directory Server upgrade
Assistance in upgrading Sun Java System Directory Server to the current version and integrating with Solaris systems
Feb 2007 - Mar 2007
2 months
System Consultant
Bosch-Rexroth
LDAP Directory Server migration
Migration of an LDAP directory server to a new version in production
Planning and coordination of all migration-related tasks
Consultation with the client on optimized use of the directory server within the client portal
Creation and implementation of a backup strategy
Dec 2006 - Dec 2006
1 month
System Consultant
Uni Erlangen
LDAP workshop for Solaris and Linux systems
Architecture workshop on using LDAP directory server for UNIX name services
Jul 2006 - Dec 2008
1 year 6 months
System Consultant
Delta Lloyd
Identity management infrastructure
Consulting, architecture, and implementation of an identity provisioning solution based on Sun Identity Manager and an Oracle database
Integration of data from the HR system into the identity management infrastructure
Integration with an existing enterprise SSO component
Evaluation of existing applications and prioritization of applications to be connected
Support in integrating Java-based applications into an access management solution based on Sun Access Manager/Sun Directory Server
Integration of Microsoft Active Directory with Sun Identity Manager
Jun 2006 - Sep 2009
3 years 4 months
System Consultant
msgGillardon AG / Finanz Informatik Technologie Service
System administration of UNIX systems and introduction of LDAP
System installation and administration in the trading platforms and online banking environment for various banks; Solaris 8/9/10, Sun Cluster, Veritas Volume Manager, and Linux RedHat Enterprise Server, RedHat Cluster, and Satellite Server
Integration of systems into the existing backup and monitoring infrastructure
Design and implementation of an LDAP server for authentication of UNIX (Linux, Solaris, AIX) users and management of these users via Sun Identity Manager
Handling customer orders and tickets
Incident, problem, and change management according to ITIL
Support of applications and their infrastructure
May 2006 - May 2006
1 month
System Consultant
Delta Lloyd
Identity management infrastructure
Upgrade of the environment and support for the development department in creating a J2EE application
Mar 2006 - Present
19 years 5 months
System Consultant
Freelance
Projects in identity and access management, Single Sign-On, and LDAP directories
Development of Java modules
Development and administration of Java/J2EE-based applications on various application servers
Administration of Unix systems (Linux, Solaris, AIX) and applications
System migrations
Nov 2005 - Dec 2005
2 months
Consultant
T-Systems
T-COM ID
Consulting on the introduction of a Single Sign-On solution for RechnungOnline
Development of Java login modules for a Single Sign-On solution for SAML and Liberty Alliance-based authentication
Extension of LDAP directory schemas
Installation and configuration of a web server with SSO policy agent
Sep 2005 - Oct 2005
2 months
Consultant
Delta Lloyd
Identity management infrastructure
Development of an architecture for an identity management solution with LDAP directory server, access management, Single Sign-On, and provisioning
Installation and customization of the solution on Linux within workshops
Support for software development in integrating a new J2EE application into the access management and SSO parts of the solution
May 2005 - Feb 2006
10 months
Consultant
Morse GmbH
Conception of complex IT architectures based on Sun systems
Installation and configuration of hardware and software, especially Sun systems with Solaris and Linux
Product selection, configuration, and preparation of technical proposals for client projects
Support for sales in client projects as technical consultant
Feb 2004 - Feb 2005
1 year 1 month
Service Account Manager
Sun Microsystems GmbH
Planning, coordination, and execution of projects for installation of Sun hardware and software
Ensuring maximum availability of client systems through proactive services
Responsibility for delivery of reactive and proactive service offerings to clients
Escalation management and personal client support to achieve maximum client satisfaction
Focus on technologies and products:
Sun systems and Solaris 8, 9, Sun Cluster 3.1,
Veritas Volume Manager, Veritas Cluster
Sun/Hitachi Data Systems Storage
Jan 2004 - Dec 2004
1 year
Service Account Manager
O2
Planning, coordination, and execution of installations of Sun hardware and software in various projects (Lotus Notes environment, Home Zone Management Cluster, DWH, Dealer Gateway, WAP Gateway, etc.). Products used included:
Sun systems (e.g., SunFire 15K, SunFire 25K, SunFire 6800, SunFire V440, SunFire V880/V890, SunFire V490, SunFire V40z, LX50, etc.)
Sun StorEdge/HDS 9960, HDS 9980, HDS 9990, A3000, A5000, etc.
Solaris 8, 9 including StorEdge SAN, Red Hat Linux Advanced Server 2.1
Solaris Jumpstart Kit
Sun Cluster 3.1
Veritas Volume Manager
Jan 2003 - Dec 2004
2 years
Pre-Sales Consultant
Deutsche Telekom
Pre-sales for a Single Sign-On solution
Support of sales for a Liberty Alliance standards-based SSO solution for Deutsche Telekom divisions. Tasks included:
Presentations
Architecture consulting and clarification of technical details for software use within the desired solution
Collaboration with product management and development teams to address customer requirements
Installation of a test environment
Support for software developers in integration into a proprietary Java-based application
Product installation and benchmarking in a proof of concept
Jan 2003 - Dec 2004
1 year
Pre-Sales Consultant
HypoVereinsbank
Pre-sales for an LDAP directory server project
Support of sales in selling Sun Directory Server for user authentication in a BEA WebLogic-based application project. Tasks included:
Presentations
Creation of a highly available directory server architecture considering failure scenarios
Troubleshooting of the installation
Jan 2003 - Dec 2004
1 year
Pre-Sales Consultant
T-Mobil
Pre-sales for a portal server project
Support of sales in selling Sun Portal Server. Tasks included:
Presentations
Architecture consulting and clarification of technical details for integration of identity, access management, and SSO components of the portal server with the existing environment
Jan 2001 - Dec 2002
1 year
Pre-Sales Consultant
Ision / Mercedes-Benz
Mercedes-Benz portal
Support of professional services in troubleshooting a J2EE application server installation. Tasks included:
Assistance in upgrading the application server in a high-availability environment
Support in troubleshooting and performance testing of the portal
Jan 1999 - Dec 2003
3 years
Pre-Sales Consultant
D2 – Vodafone
Pre-sales for an LDAP directory server project
Support of sales in selling Sun Directory Server for customer authentication. Tasks included:
Presentations
Responding to RFPs
Support of the solution partner
Creation of the solution architecture
Architecture consulting and clarification of technical details for software use within the desired solution
Installation of a test environment
Definition of proof of concept scope
Product installation and benchmarking in a POC
Jul 1999 - Jan 2004
4 years 7 months
Pre-Sales Consultant in Java Web Services / iPlanet
Sun Microsystems GmbH
Installation, configuration, and demonstration of Sun solutions at client sites, events, or trade shows
Development and presentation of complex system solutions and validation via proof of concept
Collaboration with product management and development teams to address customer requirements
Independent technical and conceptual support for sales representatives
Technical consulting for clients focusing on:
Identity Management and Single Sign-On
Web and application servers (J2EE)
Portals (Portal Server)
Jan 1998 - Dec 2000
2 years
Pre-Sales Consultant
Volkswagen
Pre-sales for a J2EE application server project
Support of sales in selling iPlanet Application Server in a vehicle weight assessment project. Tasks included:
Presentations
Support of the solution partner in solution development
Architecture consulting and clarification of technical details for software use within the desired solution
Installation of the production environment in a workshop
Jan 1998 - Dec 1998
1 year
Pre-Sales Systems Consultant
Siemens Nixdorf
OEM partnership and hardware compatibility testing of systems
Tasks included:
Installation of Solaris on Siemens Nixdorf Intel systems
Installation of the test suite
Explanation of the installation to the client
Clarification of driver issues with the client and development team in the USA
Execution of the test suite
Discussion of results with Siemens Nixdorf staff
Reporting test results to Sun in the USA
Jan 1996 - Dec 1998
3 years
Pre-Sales Systems Consultant
Siemens Nixdorf / Bezirksfinanzdirektion München
Pre-sales for Solaris desktop and server systems
Support of Siemens Nixdorf in rolling out Solaris Intel desktop systems in financial offices. Tasks included:
Installation of test systems
Clarification of driver compatibility
Certification of new hardware using the test suite
Support in installing a network installation environment
Presentation of new features in new Solaris releases
Troubleshooting issues
Mar 1995 - Jun 1999
4 years 4 months
Pre-Sales Systems Consultant in SunSoft
Sun Microsystems GmbH
Planning and execution of customer-oriented demos, presentations, and trial installations
Development and presentation of complex system solutions
Support of the partnership between Sun and Oracle
Independent technical and conceptual support for sales representatives
Training and consulting of partners and OEMs on products
Technical consulting for clients and partners focusing on: