IBM z/OS Experts in Munich
for secure, high-volume mainframe systems, matched in minutes with AIHire experts who modernize z/OS estates, optimize COBOL and PL/I workloads, and connect mainframe data with APIs and cloud services. FRATCH matches you quickly with vetted, available freelancers whose experience fits your technical and delivery needs.
Meet FRATCH Experts in Munich, who have recently used IBM z/OS
Birgit S.
Last position:
Business Analyst / Requirements Engineer / Tester at BMW
Topics:
- Further development of the CRM system NKAM and technical separation of “direct” and “indirect” sales
- Redesign of the discount management area and outsourcing to another system.
- Designing numerous improvements on the wholesale side to reduce manual effort down to the level of user stories.
Kai P.
Last position:
Oracle Project Management and DBA at Scope Solutions AG
PROFILE Senior Oracle specialist, consultant and DBA with many years of experience in planning, architecture, installation, migration, operations, performance tuning and troubleshooting of large Oracle database environments. Focus on Oracle Database 19c and enterprise architectures with RAC, Active Data Guard, Golden Gate, Exadata, RMAN and CDB/PDB. Experience in heterogeneous enterprise environments on Linux, AIX, Solaris, HP-UX and Windows, as well as in cloud and migration projects. Over many years, worked as a technical consultant, DBA, architect and project manager for banks, insurers, energy providers, public institutions, industry, automotive and aviation. Combining technical Oracle expertise with operations concepts, migration, project planning, documentation and customer consulting.
ORACLE FOCUS AREAS
- Oracle Database 19c – installation, upgrade, patch/RU management, operations and troubleshooting
- Oracle Database 21c / 23ai / 26ai – knowledge of current Oracle release lines
- Oracle RAC, Active Data Guard, Data Guard, Oracle GoldenGate
- CDB / PDB, multitenant architectures and enterprise database operations
- Oracle Exadata and highly available database environments
- RMAN – backup, restore, recovery, migration and disaster recovery scenarios
- Data Pump (EXPDP / IMPDP), Transportable Tablespaces (TTS) and database-based migrations
- Performance analysis, SQL / PL/SQL, tuning, troubleshooting and capacity planning
- Oracle Enterprise Manager / monitoring and technical operational support
- Oracle Security: Wallet, TDE, Database Vault, VPD / RLS
- Oracle DWH / BI: OBIEE, ODI, OWB and Discoverer
- Oracle Applications / E-Business Suite and Oracle-based application environments
CURRENT PROJECTS
Scope Solutions AG, Basel / CH | 08/2023 – ongoing Oracle Project Management and DBA
- Installation, maintenance and regular upgrades of Oracle database systems with a focus on Oracle 19c.
- Patch and release management including OPatch and Release Updates; operations on RHEL 8.x, SLES 15.x and Windows.
- DBA support for customers in DACH and Europe and support of production, load test and other CDB/PDB environments.
- Technical operating processes and documentation via Confluence; support and service requests via My Oracle Support / Metalink.
Federal Employment Agency, Nuremberg | 04/2022 – 10/2023 Oracle Operations Support / DBA
- Operations and regular upgrades of Oracle-19c database systems on SLES 15.x.
- DBA for around 2,100 PDBs on RAC and Exadata in production, integration, load test and other environments.
- Configuration management via ARS Remedy; workflows and technical documentation via Jira and Confluence.
- Operations support and processing of service requests via My Oracle Support / Metalink.
Federal Statistical Office, Wiesbaden | 09/2021 – 03/2022 Oracle Operations and Architecture – 2022 Survey
- Merging data into a central Oracle-19c database system.
- Design of import/export procedures for the central data structure.
- KPI and performance architecture for analyses.
- Training employees in Oracle performance and DBA topics.
E.ON Digital Technology, Landshut / KKI | 03/2019 – 12/2021 Oracle Operations, Architecture and DBA
- Patch concepts, technical documentation, installation, database administration and operations of Oracle 12c/19c.
- AIX 7.x, LPAR administration including VIO server and software distribution with NIM.
- Performance monitoring and monitoring.
- Backup and restore with TSM / IBM Spectrum Protect and Oracle RMAN.
- Installation of Enterprise Manager 13c with WebLogic Server 12.1x; employee training.
KaPe Munich – various end customers in DACH / Europe | ongoing / various projects Oracle DBA, architecture, migration, DWH consulting and project management
- Many years of consulting and operational DBA work in various Oracle architectures.
- DWH/CRM platforms: planning, analysis, performance and tuning, as well as business analysis.
- RAC, Data Guard, Transportable Tablespaces, RMAN and Oracle 11g/12c in enterprise environments.
- Customer projects including Burda, Deka, E.ON, Otto Group and Augsburger Allgemeine.
AXA, Germany / Europe | 09/2018 – 02/2019 Oracle DB Operations and Migration – Cloud Architectures
- Planning, methodology and execution of Oracle database migrations to IBM Private Cloud / Spectrum and AWS Public Cloud.
- Creation of Oracle databases in the cloud with SLES and Terraform templates.
- Technical architecture work and cloud KPIs.
RWE / SÜWAG / Syna, Germany | 07/2016 – 09/2018 Oracle DB Migrations 11g/12c and Project Management
- Design, planning and execution of Oracle database migrations 11g → 12c with platform and architecture changes.
- Windows Server 2012/2016 and setup and migration of Enterprise Manager/WebLogic-based monitoring environments.
- Use of Data Guard, TTS, EXPDP/IMPDP and RMAN based on analysis of application requirements.
- Performance and tuning for Oracle 11g/12c.
MTU Aero Engines, Munich | 01/2016 – 03/2017 Oracle DBA / Requirements Engineer
- Operations and development of Oracle 11g/12c databases and application workflows.
- Interfaces to SAP via BAPI.
- Design and management of APPS modules with Visual Basic / Visual Studio and PL/SQL; version control with SVN.
UBIS (HVB), Munich | 04/2012 – 08/2015 Oracle Operations, Architecture, DBA and Project Management
- Oracle-based operations and migration of MUREX and Sophis trading platforms.
- Oracle Security, Wallet, Tablespaces, RAC, Data Guard, Database Vault, GoldenGate and DWH.
- Project management for Oracle DWH migrations and release changes from 10g to 11gR2.
- Migration OWB 11gR2 → ODI 12c and introduction of Oracle Database 12c.
- Platforms: Red Hat, AIX and Solaris.
WWK Deutschland a.G., Munich | 09/2010 – 03/2012 Oracle DB and HP-UX → Linux Migration
- Architecture, planning, operations concept and migration of 104 databases from an HP-UX cluster to Red Hat Linux.
- Single Instance with Veritas Cluster and 2-node RAC 11.2.0.2; four Data Guard databases.
- Project management for OWB/DWH migrations (>1 TB), including tuning, PL/SQL, mappings and metadata.
Allianz Deutschland, ACAS Stuttgart | 03/2010 – 09/2010 Technical DWH Project Manager
- DWH project for processing European ETL data sources.
- Business analysis and requirements management for automated loading processes.
- OWB, PL/SQL, SQL*Loader, Oracle Advanced Security / TDE, Oracle BI and Database Vault.
NETMA, Munich-Taufkirchen | 08/2007 – 02/2010 Oracle Specialist and DBA for Oracle Applications 11i
- Operations of Oracle 9i/10g and Oracle Applications 11.5.10.
- Design and development of APPS modules with PL/SQL and SVN.
- Oracle RAC, Enterprise Manager, Oracle Application Server and migration tests.
- Platforms: AIX, SLES, Windows and HP-UX.
BT Germany, Munich | 11/2007 – 04/2008 Oracle DB Migration
- Migration from Oracle 8i to 10gR2 in a Solaris cluster environment.
- Preparing offers, project planning and process planning.
Itellium (KQ), Nuremberg | 02/2007 – 08/2007 Oracle DWH Specialist
- Design and analysis of a DWH focusing on master data and logistics.
- Oracle Designer, OWB, Oracle Database, ETL, PL/SQL and External Tables; data volumes up to approx. 5 TB.
Oracle Deutschland GmbH, Munich | 10/2006 – 02/2007 and further assignments Oracle Specialist / Consultant – Data Migration and DWH
- Consulting for customers such as Volkswagen, GE Money Bank, WeKa, KSB, Swisscom and British Telecom.
- Migration Discoverer EUL4 → EUL5i, database optimization, Data Guard and web/database analysis.
- Performance and tuning on Solaris and Linux.
HaSpa, Hamburg | 07/2006 – 10/2006 Oracle Specialist / Consultant – Data Migration and DWH
- Setup of an Oracle-10gR2 environment for banking applications.
- Data transfer from DB2 / OS390, architecture, sizing, tuning and performance.
- Data preparation and integration with OWB.
AUDI, Ingolstadt | 02/2005 – 06/2006 Oracle Consultant and DBA
- Operations, installation and maintenance of Oracle 9i/10g and IAS 10g.
- RMAN, Oracle RLS, Oracle HTMLDB, Veritas Cluster, Solaris and AIX / HACMP.
- Database cloning and migration 9i → 10g; approx. 200 systems up to 4.5 TB.
Photocolor, Kreuzlingen / CH | 11/2003 – 01/2005 Project Manager / Oracle
- Implementation, configuration, technical support and acceptance of an Oracle ERP/CRM solution.
- Oracle Applications, Oracle 9i, Solaris, HP-UX, OWB and Mercury TestDirector.
- Project scope approx. 2 TB; reporting to management.
ZPD NRW, Duisburg | 05/2003 – 10/2003 Oracle Consultant
- Consulting, PL/SQL training and project planning for a nationwide Oracle Forms integration.
- Oracle on HP Superdome / HP-UX; data volume 1.2 → 2.5 TB, sizing up to 5 TB.
Messe München GmbH | 11/2002 – 05/2003 Project Manager / Oracle
- MIS/DWH solution with OWB, Discoverer, Oracle 11i / 9i and RAC.
- Architecture, design, integration, troubleshooting and consulting for data volumes of 1.5–2 TB.
Aria SA Integration, Geneva / CH | 09/2002 – 11/2002 Oracle DBA and Consultant
- Oracle 8.1.7.4 / 9i; merging the Stuttgart and Geneva databases via replication.
Tezcan D.
Last position:
Solution Architect / Project Manager at German Football Association
- Overall responsibility for the project lifecycle from scope definition to completion
- Close collaboration with platform teams, IT leaders, and external service providers
- Application of SAFe principles and structured sprint work
- Creation of a migration roadmap with clear milestones
- Monitoring of the lifecycle: onboarding, repository migration, replication of permissions, and system tests
- Visualization of the architecture with PlantUML and Gliffy as well as documentation in Confluence
- Regular status reports and running knowledge transfer sessions
Anton K.
Last position:
Head of Overall Technical Integration NSC / Hadoop Cloud Development at IABG
Head of overall technical integration NSC (National Secure Cloud, project with approx. 60 employees).
Technical integration of all subprojects into one product, definition of interfaces and basic components of a cloud including hardware, technical architecture of the IABG platform.
Development of a Cloud Management Platform (CMP) capable of creating private/mixed clouds of any complexity based on a textual description with one click or interactively.
CMP also includes the complete hardware management lifecycle.
Kubernetes, OpenStack and Hadoop are used as the foundation.
The management layer includes Harbor, Gitea, Longhorn, Keycloak, Rancher and Jenkins, which are configured automatically.
Private cloud can run any customer workloads, including a full Hadoop layer with HDFS, Spark, MapReduce, Mesos, HBase and around 20 additional ML/DL technologies.
Hadoop worker clusters can also be installed automatically without Kubernetes on bare metal or commodity hardware.
OpenStack with Nova, Neutron, Ironic, Swift, Cinder, Ceph.
Development of a Java application Rudi: SOAP, REST, containers, DB.
Technologies: Kubernetes (K3s, Rke2, Minikube, Harbor, Gitea, Jenkins, Longhorn, Keycloak, Rancher), OpenStack (Nova, Neutron, Keystone, Swift, Ceph, Cinder, Sahara, Magnum, Kayobe, Kolla, Bigrost, Ironic), Hadoop (HDFS, Ambari, Solr, Livy, Ranger, YARN, Tez, HBase, Kafka, Hive, Zookeeper, MapReduce, Spark, Oozie, Flink), virtualization (Kubernetes (K3S), VMware, Oracle), scripting (Ansible, Puppet, Juju, Shell, Groovy, Gradle, Maven).
Matthias S.
Last position:
IBM InfoSphere DataStage Senior Consultant at KKH (Kaufmännische Krankenkasse Hannover)
- Data migration from BVS to BITMARCK 21c|ng
- Test case creation; test execution and result analysis of the ETL processes
- Consulting on detailed planning and test execution
- Job review
- Development
- Documentation
- Error analysis & fixing / new development
- System environment: Windows 10; IBM InfoSphere DataStage 11.7.x; IBM DB2 z/OS; IBM DB2 LUW; PL/SQL; SQL; DBeaver 25.x; MS Office 365; Atlassian JIRA
Michael P.
Last position:
Setup Azure cloud, Java development, CI/CD pipelines at Sulzer GmbH
- Migration of a mainframe application (PL/1, zOS) to the cloud (Azure)
- Data transfer from z/OS (USS) to Azure storage (blob containers, file shares)
- Implementation of the mainframe job control in Java
- Mapping of job network dependencies in Control-M
- Performance analysis and optimization measures
- DB2 (z/OS) migration to Postgres (Azure)
- Technologies: Azure (storage, VM, VMSS, Postgres), z/OS (USS), DB2, Postgres, Packer, Terraform, Docker, Jenkins, GitHub Actions, Control-M
- Tools: Eclipse, Visual Studio Code, IntelliJ
Olga D.
Last position:
Software Developer (Freelancer) at Finanz Informatik Hannover
- Support and consulting for implementing ASF print components used to create PDF forms
- Technologies: DCF, ASF, DMS, SQL
- Development
- Documentation
- Program adjustments for ASF->FDVG migration
Sven H.
Last position:
Process Architect (Symbio, Signavio) at IT service provider for an international premium automobile manufacturer
- Analysis, coordination, and modeling of business processes (BPMN 2.0) for the 'The New Retail' program in the areas of 'Invoicing', 'Tax', 'Customs', and 'Accounting'
- Tracking user stories and their impact on processes
- Contact person for preparing the tool migration from Symbio to Signavio for the areas mentioned
- Power user after the introduction of Signavio, contact person and coach for the other process modelers
Discover over 15,000 top freelancers
Statistics of experts using IBM z/OS
Aggregated from the professional profiles of matched freelancers.
Experience
31 years
Position duration
1.9 years
Positions per freelancer
20
Top business areas
Information Technology, Business Intelligence, Project Management
Top industries
Banking and Finance, Information Technology, Insurance
Certification focus areas
Information Technology, Human Resources, Operations
Bachelor's degree or higher
100%
Master's degree or higher
83%
Doctorate
17%
Certifications per freelancer
2
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Munich are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Munich using IBM z/OS
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 29 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
IBM z/OS experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Banking and Finance (100%)
- Information Technology (100%)
- Insurance (88%)
- Automotive (75%)
- Manufacturing (63%)
- Energy (38%)
- Government and Administration (38%)
- Retail (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Core platform
IBM z/OS is the operating system for IBM Z mainframes. It runs transaction processing, batch workloads and databases that support banking, insurance, logistics, manufacturing and public services. Companies choose it for controlled access, resilient operations and dependable processing of critical data.
Mainframe workloads
z/OS supports large-scale systems built around CICS, IMS, Db2 for z/OS and IBM MQ. Common deliverables include COBOL or PL/I programs, JCL job streams, batch schedules, APIs and data integrations. Specialists also work with VSAM, RACF, TSO, ISPF and system utilities across production environments.
- Maintain and extend COBOL, PL/I and assembler applications
- Design JCL, batch flows and operational procedures
- Connect mainframe data to Java, APIs and cloud services
- Improve Db2, CICS, IMS or MQ performance
Ecosystem and tooling
Strong z/OS expertise covers more than application code. It can include JES2 or JES3, SMP/E, RMF, SMF, RACF, z/OS Connect and IBM Z Open Development. Professionals may also use Git-based workflows, automated testing, CI/CD tooling and Ansible to bring modern delivery practices into established mainframe estates.
When to bring specialists
Companies often need freelance expertise during migration, modernization, audit preparation or a major release. External specialists can help when internal knowledge is concentrated in a small team, when legacy interfaces are poorly documented or when a new integration must meet strict availability and security requirements.
- Replace fragile interfaces without disrupting core processing
- Analyze abends, batch delays and capacity constraints
- Prepare documentation, runbooks and knowledge transfer
- Support mergers, platform changes and controlled cutovers
Munich delivery context
In Munich, z/OS work can support financial services, industrial supply chains, insurance operations and public-sector systems. Remote collaboration is practical for code reviews, analysis and documentation, while access-controlled environments or release work may require on-site coordination. German and English communication needs should be agreed before the engagement.
Choosing strong experts
Look for professionals who can explain dependencies across JCL, applications, middleware, databases and operations. Ask for evidence of safe production changes, clear testing practices and incident response, not only familiarity with a single language. The strongest specialists understand business-critical processing and can make modernization decisions without treating the mainframe as an isolated system.
Frequently asked questions
Key details about IBM z/OS, drawn from the questions we get asked most.
IBM z/OS is used to run secure, highly reliable workloads on IBM Z mainframes. It commonly supports banking transactions, insurance processing, supply-chain systems, batch operations and large enterprise databases.
z/OS is optimized for IBM Z hardware, centralized control and continuous processing of critical workloads. Linux and cloud environments may offer broader infrastructure flexibility, while z/OS remains valuable where transaction integrity, established mainframe applications and predictable operations are central.
A strong IBM z/OS specialist often works with COBOL, PL/I, JCL, CICS, IMS, Db2, IBM MQ and RACF. API integration, Java, Git, automated testing, Ansible and cloud connectivity are also useful for modernization projects.
The right level depends on the work. A contained JCL or batch change may need focused expertise, while a production migration, Db2 redesign or CICS integration calls for a specialist who understands architecture, testing, operations and release controls across z/OS.
Many IBM z/OS tasks can be handled remotely, including code analysis, documentation, testing and design reviews. Secure access rules, production releases and workshops may make occasional on-site collaboration in Munich useful.
Check whether the professional has worked with the relevant subsystems, languages, deployment controls and business processes. Ask how they approach testing, rollback, documentation and knowledge transfer on z/OS, especially when changes affect live transaction or batch workloads.
Quality shows in precise dependency analysis, cautious change planning and clear explanations of operational risk. A capable IBM z/OS expert can connect application behavior with JCL, middleware, databases, security controls and system performance.
No. z/OS still supports established core systems while connecting them to APIs, event flows, web applications and cloud services. Modernization can improve delivery and integration without replacing every proven mainframe workload.
The average hourly rate of freelancers in Munich, Germany who have used IBM z/OS in their recent projects is 102 €, which corresponds to a daily rate of about 816 € based on an 8-hour working day.
Of the freelancers in Munich, Germany who have used IBM z/OS in their recent projects, 100% hold at least a Bachelor's degree, 83% hold at least a Master's degree, and 17% hold a doctorate.
On average, freelancers in Munich, Germany who have used IBM z/OS in their recent projects have 31 years of professional experience, with a single engagement typically lasting around 1.9 years.
The most common languages among freelancers in Munich, Germany who have used IBM z/OS in their recent projects are German (100%), English (100%), and French (50%).
The most common industries among freelancers in Munich, Germany who have used IBM z/OS in their recent projects are Banking and Finance (100%), Information Technology (100%), and Insurance (88%).
The most common business areas among freelancers in Munich, Germany who have used IBM z/OS in their recent projects are Information Technology (100%), Business Intelligence (75%), and Project Management (75%).
Main locations of FRATCH Experts, who have recently used IBM z/OS
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Countries:
Berlin Hamburg 
Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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FRATCH CEO
