Master Data Management Expert in Hamburg

• Support for one of the largest logistics service providers in handling ServiceNow tickets in the areas of SAP MDG, Business Partner (BP), customer and supplier master data
• Technical analysis and resolution of tickets through in-depth review of various database tables
• Creation and maintenance of accounting clerks in the system
• Deactivation of company codes using transports
• Carrying out mass changes with LSMW (Legacy System Migration Workbench)

I implemented a Zero-Trust architecture for robust, military-grade maritime container mini data centers based on VMware & Tanzu to support containerized GIS workloads for ground forces. The main focus was on securing communications, workload protection, and data access in contested electronic battle environments affected by jamming, interception, signal manipulation, and constantly changing operational conditions. I designed and architected use cases so that every element of workload, identity, and system could continue to operate independently and securely even in degraded or disrupted scenarios. In parallel, I defined the enterprise and solution security architecture with LeanIX, Bizzdesign, and HOPEX as enterprise architecture, repository, and governance platforms to maintain architecture inventory, relationships, traceability, target pictures, and security governance in complex environments. For the architectural designs, I used Sparx Enterprise Architect to describe formal architecture views, interfaces, trust boundaries, and system architecture in both IT and OT environments. IriusRisk was used for threat modeling of the solution to identify architecture-driven risks, derive security requirements, and detect countermeasures and design gaps directly from the solution models. Risk and compliance management was supported with Archer. Architecture decisions, control gaps, and operational risks were translated into controlled governance and auditable compliance measures. For documentation, collaboration, and visual design, I used Confluence to maintain Architecture Decision Records, Security Blueprints, and workflows. I used Lucidchart and draw.io to create design artifacts tailored to stakeholders. I also defined OT security concepts with support from electrical and mechanical engineers in the areas of oil, vehicle onboard systems, rail, power plants, pharma, gas turbines, and nuclear technology. I created the end-to-end OT security strategy, starting with global policy, developed into standards and procedures, and finally aligned with Bell-LaPadula, Purdue Model, SABSA, TOGAF ADM, CENELEC 50701, IEC 62443, and NIST standards. In addition, I worked with engineering team leads to identify critical KBP assets and place them under protective measures that segmented SCADA, PLC, and HMI assets. I drove collaboration between Security, IT, and OT teams to create standardized workflows and use cases for the OT security solution catalog, while integrating Defense-in-Depth and Zero-Trust principles into operational environments. A key part of my work was integrating multidisciplinary engineering, security, and operations stakeholders into a unified security blueprinting strategy and ensuring that architecture, threat modeling, governance, and documentation were technically strong and operationally practical.

• Development and further development of e-invoicing solutions, interfaces for invoice processing, and implementation of regulatory requirements

Technology & methods: XRechnung, ZUGFeRD, EN 16931, XML, API integration, backend development, cloud services, automation, compliance, AI-supported document analysis

• Enterprise and IT strategy
• Digital transformation
• Process and portfolio management
• Interim IT management

• Analyzed the required scope of processes, infrastructure, and SAP for integrating the MacDermid subsidiaries
• Validated proposals from the new service providers
• Managed the collaboration and tracked the tasks of business and IT experts
• Coordinated communication and the PMO
• Created cutover plans in three waves for SAP conversion, Salesforce, and Ariba

• Led project management for over 150 validation and verification projects for medical ceramic implants (hip, knee, shoulder, spinal and dental) across international production sites, including presses, mills, turning, grinding, milling, polishing, proofing, laser, washing and packaging equipment, as well as cleanrooms
• Managed the validation team and overall planning of validation activities, including creation of application specifications, equivalence analyses, risk classifications and validation plans (VP/DP/IP/OP/PP/FAT)
• Performed FATs at suppliers, and prepared FAT and final reports for regulatory submissions to authorities and customers
• Participated in internal, regulatory and customer audits
• Senior project lead for SAP PS-BAU at a leading Frankfurt bank: led the development team, coordinated external service providers, acted as single point of contact for the business unit, and supported design phase and test management
• Provided consulting and conducted trainings and workshops on quality, validation and regulatory requirements for international equipment manufacturers and system integrators
• Provided consulting and project leadership in supply chain, logistics and procurement for international clients

• Consulting on SAP authorizations and governance
• Conducting governance consultations, iteration support and project coordination
• Developing solutions for effective control and monitoring of SAP authorizations
• Creating concepts and recommendations
• Drafting detailed concepts to improve the assignment and management of SAP authorizations
• Providing clear recommendations based on established methods and best practices
• Creating/customizing authorizations for MM including MDG/MDM as well as FI, PP including AIRC Services within SAP Finance
• Reviewing existing structures and processes
• Analyzing and evaluating current SAP authorization structures and processes
• Identifying weaknesses and developing optimization strategies
• Conducting trainings and workshops
• Planning and delivering trainings and workshops for awareness
• Sharing knowledge in SAP authorizations, including role assignment, support during iterations and consulting on role development in the pharmaceutical environment.

• S/4 HANA template rollout "PHI"
• Sales process consulting (Order to Cash), supporting the department in business process optimizations for sales and shipping
• Stock transfers (STO), specification for a client-specific transport planning and evaluation tool considering load capacities and load characteristics
• Sub-project lead for the EDI integration of external warehouses via DESADV/WHSCON, SHPORD/SHPCON, customizing, and testing