SAP Business One Experts in Germany

• DTO class generator: In-house development of a tool for the automatic generation of classes, functions, and methods for use in .NET Core projects based on SAP Business One Service Layer metadata
• E-invoice import add-on: Development of a SAP Business One add-on / coresuite module for the automated import of ZUGFeRD e-invoices as incoming invoices – with configurable mapping to flexibly control the import logic across four mapping types (DIRECT, SQL, FIXED, EXPR). The add-on is available as a licensed product for SAP Business One customers.

Stack: SAP Business One, SAP Business One Service Layer, coresuite Country Package, C#

• Interim management and management consulting with a focus on sales, brand management, internationalization, business development, and market entry strategies for international consumer goods and trading companies.

• Controlling project work: implementation of customer quotation calculation and development of a trading and forward calculation for sales
• Development of a cost of goods manufactured calculator
• Theoretical design and practical implementation: temporary Excel-based solution introduced quickly; embedding into INFOR LN and creation of the requirements specification
• Majority of project management using modern tools (Loop, Jira, Excel, PowerPoint)
• Regular reporting on quotes submitted (contribution margin 1 and full cost coverage) and comparison with post-calculation

• Detailed information in the reference projects file
• Responsibility for the strategic and operational management of the company
• Leading and coordinating product development projects in the areas of e-health and medical technology
• Freelance project management activities in various industries, including IT and medical technology
• Introduction of innovative products and solutions in medical technology, connectivity and fitness in international markets
• Building platforms for e-health and corporate health management
• Introduction and migration of ERP systems (SAP Business One, JTL WaWi) in sales- and production-oriented companies
• Project management for international and cross-company projects
• Crisis management and successful control of critical projects
• Support of IT infrastructure including server landscapes and SAN systems
• Consulting for international company founders

• Interim management of IT operations in the IT service provider business
• Implemented ISO 27001 certification including preparation of all documentation
• Implemented change processes and system migrations
• Optimized operational workflows and realigned technical systems and administrative processes
• Brought multiple large projects into production
• Launched a new business line in the gaming PC sector

• Created internal web application to improve the salary process using a microservice interfacing with MSSQL
• Developed interactive web UI using Microsoft Blazor
• Integrated Azure AD for user authentication
• Designed and implemented roles and permissions in the database
• Developed progress page guiding users through each process step
• Processed bonus calculations by importing Excel files
• Configured email notifications using MSSQL Send Mail
• Tools and technologies: C#, ASP.NET 6, MS-SQL, REST API, Visual Studio 2022, TFS, microservices, Kanban Board, Azure DevOps

• Conceived and implemented customer solutions, accurately estimating project efforts
• Tested and documented fully developed software using C# and Visual Basic with .Net
• Collaborated in the installation, configuration, and maintenance of SAP Business One systems
• Utilized Microsoft Visual Studio and version management (SVN) for efficient development
• Managed code repositories and collaborated with teams on GitHub for seamless workflow and version control
• Provided 1st and 2nd level support for SAP Business One users, promptly resolving issues
• Collaborated with customers to troubleshoot and optimize add-on solutions
• Familiarity with FSM SAP integration, facilitating efficient field service management
• Leveraged GitHub for issue tracking and knowledge sharing within the support team

• Building up the workforce from 1,300 to 1,850 employees (white-collar positions) together with the team and an external colleague
• Advising the company across the entire recruiting process chain
• End-to-end recruiting
• Active sourcing
• Close collaboration and coordination with internal and external stakeholders (e.g. external HR service providers, hiring managers and works council)

• The customer is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a standard template worldwide.

• The program also includes the “RISE with SAP” migration and modernization program, which may involve migrating the landscapes of selected country installations to the SAP Private Cloud.

• On the stakeholder side, the program reporting line extends to the company’s executive board and that of the implementation partner.

• Fiserv Germany’s ERP landscape currently includes several non-standard SAP tools and applications that extend the functionality of the ECC environment and can often be integrated into downstream systems. As part of the transition to SAP S/4HANA, it is essential to assess the core functionality, integration points and future viability of these applications in order to determine their alignment with the target architecture.

• The focus of the work is on providing expert advice and assessment to define the scope, strategy and roadmap for transitioning Fiserv Germany’s SAP ECC system to SAP S/4HANA.

• The recommended best practices from SAP are followed and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.

• This assessment forms the basis for a successful SAP S/4HANA transformation and ensures alignment with industry best practices, regulatory compliance and future scalability.

• Migration Strategy Definition – assessment of available transition approaches based on business objectives, technical feasibility and SAP Best Practices.

• Technical Readiness Assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points and infrastructure readiness for SAP S/4HANA.

• Business Process Impact Analysis – reviewing the latest business process documentation to define the scope and effort required to implement the necessary functions in SAP S/4HANA and to identify opportunities for process optimization.

• Roadmap for Non-SAP Systems and Applications – assessment of third-party and legacy applications regarding their integration with SAP S/4HANA and recommendation of consolidation, migration or replacement strategies.

• Deployment & Implementation Planning – defining a phased approach for implementation, including project schedules, risk mitigation strategies and key milestones aligned with business priorities.

• This transformation takes place in phases: the Discovery phase leads to the Explore phase, which is followed by the Design phase and finally implementation.

• Program management

• Change management

• Requirements management

• Transition management

• Stakeholder management

• Risk management

• Comprehensive coordination

• In just a few weeks, I became independently able to close deals in a completely new, technically demanding product environment: I qualified incoming online leads (social media, landing page), provided technical advice, prepared quotes, and negotiated contracts (SAP Business One).
• In about seven months, I closed deals worth roughly EUR 340,000, including a semi-trailer for transporting up to four premium SUVs (order value approx. EUR 242,000, including clarification of technical feasibility).
• Left due to operational reasons as part of a restructuring.

• Climate solutions, approx. 14,800 employees, approx. €3.9 billion revenue
• Led and managed the carve-out of Viessmann Climate Solutions from the Viessmann Group into the publicly traded US group Carrier Global Corporation
• Responsible for adapting and converting monthly, quarterly, and annual financial statements to US GAAP, including group reporting to Carrier Group
• Further developed, restructured, and optimized group reporting, commercial processes & structures; implemented Fast Close & Power BI; and developed and coached finance departments

• Coaching
• Mentoring
• Project management
• Quality management
• IT security management
• Release management
• Change Management
• CRM

• Clearing of accounts receivable and accounts payable in the finance department
• Reconciliation of receivables and payables using big data analysis (>80,000 PDFs)
• Integration into a new application using automated flows
• Use of AI Builder & Prompt, Azure AI Document Intelligence, fuzzy matching & Python

• Design and implementation of a Laravel backend API for provider-based geo search, feature details, boundary geometries and neighborhood detection.
• The API serves as a server-side proxy, cache and enrichment layer, protecting credentials for external geo services and persisting features, localizations, geometries, hierarchies and neighborhood relationships in MariaDB.
• Key areas included normalization of autocomplete and feature data, caching strategies for expensive boundary/polygon requests, spatial processing of GeoJSON and MultiPolygon geometries, as well as neighborhood detection using hierarchies, bounding box filters and topology checks.
• Additionally, separate production and diagnostic endpoints were created, along with status and error catalogs, discovery logging, a Docker development stack, API documentation, and unit and feature tests.
• Technologies: PHP 8.3, Laravel, REST API, geo data API, GeoJSON, MariaDB Spatial, Eloquent, Laravel Queues, PHPUnit, Mockery, Docker, Docker Compose, API design, geocoding, boundary data, spatial queries.