ABAP Experts in Berlin

• Adding/creating test specifications
• Performing regression tests
• Performing release tests
• Analyzing Jira tickets
• Identifying software defects and fixing them with C#

Assessment of the product, delivery, and AI organization with a realignment of operational excellence, target architecture, and AI-first operating model

Situation: The product and delivery organization showed structural weaknesses in efficiency, control, and collaboration. In addition, there was no clear target architecture for AI-driven product and organizational development. At leadership level, there was limited transparency regarding roles, responsibilities, and operational performance.

Responsibility & approach:

• Analysis of the existing product, delivery, and organizational structures in terms of processes, governance, and controllability
• Evaluation of architecture and platform with regard to scalability, future readiness, and AI integration
• Development of a target picture for an AI-first product and delivery operating model
• Derivation of concrete measures to improve operational excellence and collaboration
• Sparring with the leadership team on structured organizational development

Results & impact:

• Creation of transparency regarding structural bottlenecks, performance, and decision-making logic
• Development of a target structure for a scalable AI-first product and delivery setup
• Improvement of decision-making capability and control at leadership level
• Creation of a solid basis for downstream transformation measures
• Definition of concrete levers to improve efficiency, collaboration, and time-to-market

Following the Vaillant engagement, established independent practice focused on senior SAP advisory and building ASTRA — a methodology, not a tool. ASTRA is independent and unbiased: the same four pillars serve CIO / Business Leadership, SI / SAP Practice, and Programme Director / Principal with equal weight. No audience is primary.

ASTRA serves three audiences with equal weight — CIO / Business Leadership · SI / SAP Practice · Programme Director / Principal. ASTRA is independent and unbiased — it does not sit inside any SI practice and does not serve any single audience as primary customer. Each audience receives a role-calibrated output from the same analysis.

One methodology, two outcomes:

OUTCOME 1 — SAP TRANSFORMATION GOVERNANCE:

Any active SAP programme: ECC→S/4HANA Greenfield, Brownfield, Global Rollout, AMS. The four pillars answer the four questions that determine whether a transformation succeeds — for any of the three audiences.

• Are business requirements clean — or is the SI building what SAP standard already covers? (Functional Auditor → all three audiences)
• Is the custom object inventory healthy — or accumulating debt that blocks upgrades? (RICEFW Auditor → Director and CIO)
• Is the SteerCo reporting accurate — or is leadership seeing a Watermelon? (Truth Engine → CIO and Director)
• Are people ready for the system they are receiving? (Human Signal → CIO and Director)

OUTCOME 2 — AUTONOMOUS ENTERPRISE READINESS:

Any programme deploying Joule, pursuing RISE, or planning an AE migration. The same four pillars answer the questions SAP does not — again, calibrated per audience.

• Which custom objects block the 224 Joule AI agents? (RICEFW Auditor → SI gets remediation paths, Director gets verdicts, CIO gets financial impact)
• Is the Fiori deployment complete enough to activate Joule? (Truth Engine → all three audiences)
• Is the workforce trained for AI-native working? (Human Signal → CIO and Director)

Four pillars (each serves all three audiences):

• Functional Auditor: Clean Core Score 0–100. Section A (CIO): KG fidelity risk in €. Section B (Director): SI challenge questions, man-day saving. Section C (SI): Language Translation Ledger, SAP alternatives.
• RICEFW Auditor: Joule API Pathway Audit, Clean Core Level A–D, Technical Debt Index 1–10. Section A: financial impact of blocked AI agents. Section B: RETIRE/MIGRATE/REDESIGN/KEEP verdicts. Section C: BTP remediation paths.
• Truth Engine: Watermelon Detection, Fiori Deployment check, Programme Truth Score 0–100. Section A: 3 SteerCo questions. Section B: 48-hour action list. Section C: vendor friction map.
• Human Signal: three-stage Fiori adoption model, HITL Policy readiness, Human Signal Score 0–100. Section A: GUI training weight, AE adoption financial risk. Section B: go-live recommendation, stakeholder resistance map.

On-Demand SAP Advisory:

• SAP Programme Management — end-to-end governance, factory management, multi-stream delivery, vendor oversight, SteerCo reporting for Greenfield, Brownfield, Rollout and AMS programmes.
• Delivery Management — RICEFW oversight, Data Migration governance, Release & Cutover management, Hypercare, SLA/KPI management.
• Due Diligence & Landscape Assessment — SAP landscape review, AS-IS/TO-BE roadmap, RFP structuring, SI selection advisory.
• IT Strategy & CIO Advisory — transformation roadmap, Clean Core strategy, Autonomous Enterprise readiness planning.
• Programme Recovery — distressed programme assessment, rapid governance setup, escalation resolution.

Operating through senior professional networks across EMEA.

• Implementation of the S/4HANA transformation (brownfield) at an agricultural equipment manufacturer
• Implementation of the new supplier evaluation in S/4HANA, including programmed technical adjustments to customer-specific processes
• Conducting workshops with business departments on technical and functional changes in S/4HANA, with a focus on P2P processes and approval processes
• Preparation of the new system incl. customizing and conversion of customer-specific ABAP developments to Clean ABAP

• Finalised several addon implementation projects as project manager, coordinating external service providers
• Implemented VAT reporting, e-invoicing, asset reporting, drug reporting to governmental authorities
• Played key role as business solution design specialist in an S/4HANA implementation project across PP-PI, eWM, QM, PM, IM, MM, SD and other logistic areas
• Designed organizational structures and processes in all logistic areas
• Developed and proofread business blueprint, managed implementation, test preparation and migration

• Designed and implemented a hybrid recommendation system (content-based + collaborative filtering)
• Built end-to-end ML pipelines including data processing, feature engineering, model training, and evaluation
• Developed RAG-based LLM systems using LangChain and vector databases for semantic search and knowledge retrieval
• Established MLOps workflows with MLflow for experiment tracking, versioning, and deployment readiness
• Implemented deep learning models (computer vision & classification) using PyTorch and TensorFlow

• Consulting in the SAP EAM module as part of the migration to EON's S/4 HANA oneERP system

• Review and cost estimation of customer-specific developments (e.g. cockpit for EAM orders, document flow display)

• Preparation of EAM classification data for technical objects (functional locations, equipment) for migration to new classes

• IT services for the administration of the SAP® systems NETZ/Sales, BW, Core, Portal
• Administration of SAP® authorizations and users via central user administration (ZBV) in SAP® Solution Manager
• Setup and further development of SAP® authorization roles
• Role assignment according to requests
• Creation, change, and deletion of users
• Incident handling and error analysis (e.g. authorization trace, debugging in test systems)
• Cooperation with the SAP® development team on new implementations and process changes
• Special tasks
• Execution of Privileged User Management (PUM) 2023–2025 using Security Bridge
• Decommissioning of the SAP® Core system and migration to S/4HANA

IT infrastructure / SAP Grantor / SAP-BTP transformation project in the public sector for the digitalization of government funding programs. The goal was a clean-core-oriented SAP-BTP solution architecture with CAP/RAP services, APIs, integrations and operational readiness for Run, AMO and AMS structures.

• Industry: Public
• Budget 2026 5 Mio EUR
• Budget planned for 2027 8,7 Mio EUR
• Team size 45 FTE

• Supported an integration project between SAP S/4HANA and a MES / Siemens Opcenter system via Azure Middleware.
• Responsible for SAP-side analysis, mapping and provisioning of relevant data objects such as material master data, production orders and process orders using SAP standard APIs and OData services.
• SAP-side mapping for Material Master, Production Orders and Process Orders
• Usage of API_PRODUCT, API_PRODUCTION_ORDER_2_SRV and API_PROCESS_ORDER_2_SRV
• Consideration of SAP S/4HANA Advanced Available-to-Promise for order confirmation, production availability and downstream MES execution
• Support for SAP Gateway and OData service topics
• Interface coordination between SAP S/4HANA, Azure Middleware and MES / Siemens Opcenter
• Support for testing, monitoring and error analysis
• Worked with BTC Cockpit and Deloitte ASADEV Tool

• Planning and implementing tailored Odoo ERP solutions to support and optimize specific business processes
• Configuring and customizing Odoo modules according to individual customer requirements, including process automation and data integration
• Training and supporting end users and administrators to ensure full use of Odoo features and to enhance user skills
• Providing ongoing post-implementation support, including troubleshooting, maintenance and updates to adapt to new business requirements
• Migrating data and integrating external applications into Odoo environments for a seamless, unified data landscape
• Analyzing and improving existing Odoo systems to boost efficiency and optimize the user experience

• conversion of a function-group-based Adobe Interactive Forms framework to an object-oriented Adobe framework for documents in transport/logistics and dunning (FI)
• Adobe Lifecycle Designer 11.0.1 for SAP
• creating new and troubleshooting existing forms, function modules, programs, classes, and methods
• maintaining Smart Forms
• document printing, email sending, and file archiving
• message control for deliveries, orders, invoices, proforma invoices, and transports
• ticket system: Jira
• communication: Microsoft Teams
• migrating customers to a new SAP framework
• handling incident and change request tickets
• software: SAP ERP 6.0, SAP_ABA 7.5G, S4CORE 1.05

• Part-time 2-3 days/week
• Developments in the SD module and CRM Interaction Center
• Consulting, customizing in SD module
• Adapting Fiori applications in the SD module
• Approval workflow for credit memos: design, concept, implementation, customizing
• Credit memo request: object type BUS 2094
• If the credit memo request value is below a certain threshold -> automatic release and removal of billing block
• If the credit memo request value is above a certain threshold -> automatic determination of the responsible employee
• The employee receives a work item in their integrated inbox or in My Inbox (Fiori) -> the employee can reject, approve, or edit the credit memo request
• UML modeling in technical documentation
• Creating a Z-table for customer sample line items
• Merging COA1 (delivery) + COA2 (CAQ) forms and adding to the spool request as a single PDF
• Correcting workflow title according to NACE, fixing message "ZBMA title is displayed incorrectly in SBWP (Workplace)"
• Receiving PLM documents from an external PLM system, creating an RFC function module, storing PLM documents in the material master as GOS objects
• On releasing a production order, reading PLM documents from MM and saving them in a shared folder for the MES system
• Displaying the number of inspection methods in a popup when creating an order -> VA01/VA02
• Automatic stock reconciliation LVS IDOC INVCON
• Performing AQUA tests
• IDOC archiving for old IDOCs
• NL_PM_drawings and storing print output, informing MES via ZPPORDER IDOC, writing technical documents
• Using SD user exits, BADIs for various requirements
• Extending screens for customer requests via screen exits
• Creating message types for sales orders, purchase orders, and invoices
• Extending CRM Interaction Center Business Partner -> Overview -> Contract with customer-specific requirements
• New Fiori application departure control with data from Z-table and standard equipment tables, displaying a pie chart, calculating "vehicles in operation"
• Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for performance feedback, attachments from GOS objects
• Extending Interaction Center Business Partner -> Overview -> new tab on Overview Page with list tables for PM quality notifications, attachments from GOS objects
• Implementing BADIs in CRM
• File storage on SAP server/UNIX server
• Using BOL/GENIL architecture in CRM development
• Project language: German

• Spearheaded the development of BW Bridge and Datasphere models, integrating S/4HANA, BW/4HANA, and BDC to enable real-time analytics in SAP Analytics Cloud (SAC).
• Designed and implemented Calculation Views using SAP HANA Modeler, aligning with LEONI's requirement for expertise in BW/4HANA modeling and Eclipse.
• Authored comprehensive technical documentation and RICEFW objects, ensuring clarity and alignment with business requirements.
• Conducted training sessions for internal teams on Datasphere and BW Bridge, fostering knowledge transfer and self-sufficiency.