Stefan Zimmer
SAP Basis Consultant / SAP Technical Consultant
Experience
Mar 2017 - Present
8 years 10 monthsSAP Basis Consultant / SAP Technical Consultant
VHV Gruppe / VHV solutions GmbH
- Technical consulting on cross-cutting SAP topics
- Incident, problem, change, and release management via ChaRM
- Implementation of support package stacks for AS ABAP and AS Java
- Unicode conversions for BW and ERP systems (CU&UC – in-place and 2-server option)
- Release upgrade from EHP7 with NetWeaver 7.4 to EHP8 with NetWeaver 7.5 for ERP systems
- Database upgrades DB2 LUW from 10.5 to 11.1 and installation of fix packs
- Installation and configuration of SAP Web Dispatcher
- Homogeneous system copies (LaMa / PCA)
- Setup and harmonization of test and project environments
- Participation in the HANA transformation project (S/4HANA, H4S4, BW/4HANA)
- Configuration of the web service runtime and SOAP
- Administration and optimization of interfaces (RFC, XML, web services)
- SAP NetWeaver security and system hardening
- SSL configuration and certificate implementation
- Creation and execution of audits (SAP, database, operating system)
- Agile working (Kanban), project coaching, and technical sub-project management
- Transport management and customizing of Solution Manager
- Monitoring and archiving of logs
- Technical transformation from on-premise to AWS Cloud HANA
- Implementation of the DORA regulations (SNC encryption)
Jan 2016 - Sep 2016
9 monthsSAP Basis Consultant / SAP Technical Consultant
Deutsche Messe AG / FUBA Automotive Electronics GmbH
- Integration of SAP components with other software components
- Technical implementation of SAP Fiori
- Development of an SAP Basis authorization concept
- User administration and authorizations
- Creation of an operations manual and system documentation
- Configuration of SAP systems for TLS 1.2
- Installation and configuration of SAP Web Dispatcher 7.45 (SSL / TLS)
- Homogeneous system copies for ERP systems with Oracle ASM
- Second- and third-level support
- Development and implementation of customer requirements
Jan 2015 - Sep 2015
9 monthsSAP Basis Consultant / SAP Technical Consultant
Stromnetz Hamburg GmbH
- Migration and operation of SAP IS-U, ERP, HCM, and BW system landscapes
- Carve-out/carve-in project from Vattenfall to SNH
- Heterogeneous migration (AIX → Oracle, Windows Server 2012 → SQL Server)
- Planning and execution of release upgrades, installations, and system copies
- Vulnerability analysis, performance monitoring, and optimization
- Technical customizing of HCM systems and business connectors (ELSTER, LstA, LSTB, ELStAM)
- Integration of HCM systems with social insurance providers (PKCS#7)
- Setup and administration of SAP portal system landscapes
- Deployment of Java components
- Configuration of ALE, BEx Web, Information Broadcasting, SSL for AS ABAP/Java
- Implementation of support package stacks
- Adobe Document Services via portal integration
- Solution Manager: configuration and system connections
Jan 2013 - Nov 2014
1 year 11 monthsSAP Basis Consultant / SAP Technical Consultant
Volkswagen AG
- Administration and operation of the global SAP infrastructure (Europe, Asia, Russia, America)
- Incident, problem, change, and release management via HP Service Center (ITSM)
- Ensuring ongoing SAP operations and dedicated interfaces
- Patching and deployment of Java components
- System copies, moves, and migrations (ABAP & Java)
- Support packages and patches for AS ABAP and AS Java
- Performance analysis, optimization, and load testing
- Database upgrades (Oracle 10g → 11g)
- Installation and upgrade of SAST (auditing tool)
Jan 2006 - Dec 2013
8 yearsSAP Basis Consultant / SAP Technical Consultant
E.ON IT GmbH / HP Deutschland GmbH
- Technical consulting for operating SAP systems in migration projects and international rollouts
- ITIL-based incident, problem, change, and release management
- Installation of single stack ABAP and dual stack NetWeaver
- Operation of SAP Business Objects and migration of complex SAP systems (AIX → Linux, Oracle)
- Data-center-wide migrations
- Patching of Java components and J2EE engine
- Deployment/undeployment of Java components
- Homogeneous system copies
- Performance analysis and optimization
- Release upgrade R/3 4.6C → ECC 6.0 and Unicode conversions
- Middleware configuration (qRFC/tRFC) for IS-U and CRM
- Database upgrade Oracle 9i → 10g
- Configuration/administration of IPC and SAProuter
- Calculation server for BI, Compliance Calibrator 5.2
- Project coordination and coaching (ITO, HVP, GLOBE)
- Data center maintenance in the SAP environment
- SAP Web Dispatcher, PI/XI, Solution Manager, and Maintenance Optimizer
- EhP upgrades via EhP installer and SUM (NW 7.01/7.02/7.31)
Jan 2006 - Mar 2006
3 monthsSAP Basis Consultant
Gutenberg Rechenzentrum GmbH
- Homogeneous system clones
- Release upgrade SAP R/3 4.6C → mySAP ERP 2004 (ECC 5.00)
- Creation of documentation and work instructions
Jan 2005 - Nov 2005
11 monthsSAP Basis Consultant
Finanz.IT GmbH
- Technical consulting for building, implementing, and operating SAP system landscapes in an IFRS environment
- Creation of operational concepts and operations manuals
- Development of system operations and production architecture
- Installations, client copies, database administration, and system copies
- Coordination and implementation of support packages and patches
- Migration of productive BW clients
- Coaching for load, performance, and system testing
Jan 2004 - Oct 2004
10 monthsSAP Basis Consultant
Solvay Pharmaceuticals GmbH
- Planning, coordination, and execution of all SAP Basis activities
- User administration and central user administration (CUA)
- Monitoring of background processing (BatchMan)
- Support of international projects up to go-live
- Interface monitoring and technical troubleshooting
- Coordination and implementation of support packages and patches
- Language transports and language imports
- Technical application support
Jan 2004 - May 2004
5 monthsSAP Basis Consultant
BASF AG
- Technical consulting on implementing SOX-compliant concepts
- Development and implementation of authorization concepts
- User administration and cleanup of critical permissions
- Activation and configuration of the Security Audit Log
- Archiving of postings, system log, and audit log
- Emergency user and developer guidelines
- Analysis of relevant transactions and role design
- Security concept for OS-level and application access
Jan 2003 - Feb 2003
2 monthsSAP Basis Consultant
Clariant GmbH
- Identification and resolution of basis-related issues
- Conducting performance analyses
- Coaching for the implementation of support packages and patches
Jan 2002 - Feb 2003
1 year 2 monthsSAP Basis Consultant
Postbank Systems AG
- SAP operations administration
- User management and central user administration (CUA)
- Interface monitoring and support
- Implementation of support packages and patches
- Performance monitoring and bottleneck resolution
- Configuration of SAProuter and communication interfaces
- Implementation of operational concepts
Jan 2002 - Jun 2002
6 monthsSAP Basis Consultant
Bertelsmann Media Systems AG
- System copies and database administration
- Support packages and patches
- Identification and resolution of SAP Basis issues
- System performance monitoring and optimization
Jan 2001 - Jun 2001
6 monthsSAP Basis Consultant
Popnet Systems GmbH
- Installations, system copies, and backup/recovery
- Database administration and optimization
- Communication interface configuration and monitoring
- Support packages and patches
- Security and performance concepts
Jan 1999 - Mar 2000
1 year 3 monthsSAP Basis Consultant
Bauer Gruppe
- BatchMan configuration and job management
- Background processing and SAProuter monitoring
- Installations and database upgrades
- Client copies and language transports
- Support packages, add-ons, patches, and corrections
Summary
As an SAP technology consultant, I provide professional support for smooth and secure SAP operations as well as in executing demanding SAP projects.
With my technology expertise and an agile, strategy- and process-driven mindset, I advise customers on implementation and upgrade projects as well as on the technical optimization of their SAP software.
In projects, I work both as a coach to project managers on technology topics; I also act as a technical sub-project manager.
I advise customers on designing, setting up, operating, and technically maintaining all SAP NetWeaver components and integrating them into other software components, taking into account customer- and project-specific requirements.
Skills
- Technology Consulting For All Sap Netweaver Components On Aix, Linux, Solaris, Hp-ux, Windows Server 2012 R2 Operating Systems, And With Ms Sql Server, Ibm Db2 Luw (Db6), Oracle, And Hana Databases.
- Planning, Installation, Administration, And Optimization Of Sap System Landscapes And Existing Interfaces
- Technical Planning And Execution Of Implementation, Carve-out/-in, Upgrade, And Migration Projects
- Sap Unicode Conversions (Cu&uc - In-place And 2-server Option)
- Analysis And Resolution Of Technical Issues In The Sap Environment
- Design Consulting And Operations For Sap System Architectures And Interfaces
- Professional Support In It Projects And In Operations/daily Business
- Incident, Release, Deployment, And Change Management
- Operational Concepts And Documentation
- Performance Analysis And Tuning Measures
- Sap Netweaver Security And System Hardening
- Creation And Execution Of Audits For Sap Systems
- Project Coaching And Technical Sub-project Management
- Working With Agile Methods And Principles (E.g. Kanban)
- Technical Consulting On Cross-cutting Sap Topics
- Sap On Aws (Sap In The Cloud, Hana)
- Agile Mindset With Strong Empathy And Communication Skills, As Well As A Solution-oriented Approach
Languages
German
NativeEnglish
Advanced Need a freelancer? Find your match in seconds.
Try FRATCH GPT More actions
Similar Freelancers
Discover other experts with similar qualifications and experience
Josef Kroiss
Architect / Senior Consultant
View Profile
Stefan Moisa
SAP Basis Administrator
View Profile
Djalil Moosawi
SAP Basis Consultant
View Profile
Helgo Göring-drewes
Migration to HANA BP
View Profile
Alagi Mansaray
Senior Project Manager S4HANA in the energy sector
View Profile
David Schievers
Consultant SAP PI/ PO/ CPI/ Project Manager/ Service Manager
View Profile
Andreas Rother
ABAP Developer, Tester
View Profile
Onik Mia
SAP SuccessFactors & S4HANA Consultant
View Profile
George Gambourg
SAP Authorization Consultant / SAP Authorization Consulting (Freelancer/SAP Consultant)
View Profile
Christoph Wagner
System Architect / System Engineer / Programmer
View Profile
Heiko Schönenberg
Consultant Managed Print Service
View Profile
Timo Casanova
Freelancer (SAP and AI)
View Profile
Steffen Pollin
Senior SAP BI Consultant
View Profile
Tobias Stötzer
Project Manager Business Technology Platform BTP
View Profile
Elisabeth Lauer-seele
SAP Consultant
View Profile
Andreas Fischer
Project Manager & Portfolio Owner for Infrastructure (Automotive)
View Profile
Matthias Kiebel
Head of IT
View Profile
Paul Webster
Architecture Consultant (Freelance)
View Profile
Heiko Krain
SAP Development, Adobe Form Development
View Profile
Volker Lutz
Principal Consultant
View Profile
Erol Tel
Self-directed study
View Profile
Andreas Neumann
Project Manager
View Profile
Willi Braun
Solution Engineer / Solution Expert
View Profile
Justin Tönjes
Work Package Lead
View Profile
Sergo Neuwert
SAP Principal Consultant (RM-CA)
View Profile
Boris Manyshev
SAP ABAP OO Consultant
View Profile
Antal Toth
GRC Consultant
View Profile
Dariusz Cok
SAP Senior Consultant
View Profile
Dieter Kuske
SAP Senior Consultant
View Profile
Münevver Yilmaz
SAP FI/CO Lead Consultant
View Profile
