Enterprise Architecture Experts in Berlin

• Building up the Enterprise Architecture department. Preparing the convergence of IT / OT.
• Mapping the global business application landscape (6 countries).
• Concept for a graph model of the application landscape. Storing the results in the open-source graph database Neo4J. Various reports in the database query language CYPHER and the visualization component BLOOM. Automatic generation of IT architecture diagrams.
• Development of an application taxonomy to identify redundant applications.
• Applying Gartner's Software Portfolio Management TIME model (Tolerate, Invest, Migrate, and Eliminate) for portfolio management.
• Enterprise Architecture Governance: establishing architecture guidelines for documenting measures and decisions.
• Process modeling according to Porter (Value Chain).
• Various architecture approvals for change requests and documentation in Architecture Decision Records (ADR).
• Working on the RACI matrix for various processes.
• Working on business capabilities as preparation for a LeanIX rollout.
• Contributing to the concept for IT/OT convergence.
• Establishing architecture guidelines in a very pragmatic corporate culture. Knowledge about applications and responsibilities is spread across the world.

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.

• Supported orderbird in setting up and driving an internal advanced analytics project for the internal customer dashboard
• Structured the internal dashboard project for later development

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

• Development of a Target Operating Model for integrated hardware, firmware and software delivery.
• Establishment of a PDMO governance model with clear roles, responsibilities and decision rights.
• Improvement of portfolio and delivery transparency for senior management and executive management.
• Integration of a stage-gate product development process with agile software delivery.
• Redesign of release, quality, change and prioritization processes.
• Development of a scalable tooling and reporting architecture for Jira and PPM systems.

• Managing the further development of IT network service management

• Overall leadership of the transition, consulting on the transition of IT network services

• IT coordination of a tender in the area of IT network services

For (3) Further development of IT network service management Managing follow-up work for the transition (including setup of issue management) Managing and monitoring the performance of external service providers Consulting and managing the further development of IT network service management (processes, procedures, organization, tools)

For (2) Transition of IT network services Overall leadership of the transition (transfer of operational responsibility for IT network services to an IT service provider) Definition and setup of transition governance Planning and tracking of milestones, dependencies and cutover windows Managing the preparation, achieving operational readiness & process/tool integration Carrying out service handovers (cutover, parallel run, stabilization) Ensuring risk management, progress tracking, steering committee and management reporting, stakeholder management

For (1) IT coordination of the IT network services tender Managing all IT work streams of an IT network tender Coordinating the creation of all service descriptions IT review / evaluation of offers IT representative in bidder talks/negotiations Creating presentations/decision papers

• Led cross-industry initiatives in product management, IT governance, agile transformation, and business development.
• Advised executives on portfolio strategy, innovation roadmaps, governance frameworks, and operational execution.
• Developed KPI dashboards and frameworks translating strategy into measurable results.

• Subject matter expert for the client on modeling and developing Camunda BPMN 2.0
• Development of new features and APIs, and coordination of tasks
• Design and development of RESTful APIs with Swagger (code first)
• Creation of target designs, high-level concepts, and requirement specifications
• Analysis and evaluation of alternative solution approaches
• Integration of external IT systems (ANUBIS, SES, ZPS) via Google GCP Pub/Sub and RESTful web services
• Pair programming, code reviews, and collaboration with API product owners
• Consulting on transforming legacy BPMN workflows and configuring Camunda BPM
• BPMN and DMN modeling and implementation in short iterations
• Operational support, bug fixing, and knowledge documentation
• Use of TDD, static code analysis with SonarQube, and integration tests
• Automation of test cases in Java and analysis of stack traces/logs on GCP-PROD
• Identification and execution of test data and documentation of test results

• Leading 20+ staff in development, site reliability engineering, and architecture.
• Leading the group-wide agentic AI initiative (Norway, Poland, Germany).
• Hands-on solution architect and AI consultant for over 50% of my working time on client projects in the publishing sector – from local publishers to international corporations.
• Strategic consulting and technical implementation of AI workflow platforms (n8n, Workato).
• Developing prototypes for traditional, AI-based, and agentic AI workflows.

• Responsibility for IT infrastructure across 8 sites, 2,500 users, 80 systems, 8,000 assets
• Responsibility for IT/non-IT procurement with €18M annual budget
• Central service provider management, digitalization of contracts and procurement
• Project management for scanning solution, site integration, MS SharePoint
• Leadership of 18 FTE across 3 teams
• Agile leadership in implementation of Digital Office and Digital Coach

Projects:

Project: RWE – Development of a company-wide Zero Trust cybersecurity architecture (CITADEL) Role: Senior Enterprise Cybersecurity Architect / Zero Trust Architect Company: RWE AG Description: Concept and implementation of the strategic CITADEL cybersecurity target architecture at RWE, based on the Zero Trust architecture principle and aligned with regulatory requirements such as NIS2, ISO 27001 and company-wide security governance policies. The goal was to build a measurable, auditable and scalable security architecture with a strong focus on Identity Governance, compliance transparency and operational manageability. Responsibilities & Achievements:

• Zero Trust architecture design: Developed a company-wide Zero Trust reference architecture (Identity, Device, Network, Application, Data) including trust zones, control points and enforcement mechanisms according to NIS2.
• Identity & Access Governance (IGA): Designed and introduced IGA governance structures including role models, recertification processes, segregation of duties (SoD) and lifecycle management for identities and access.
• Security governance & KPIs: Defined and implemented security KPIs and metrics to manage Zero Trust maturity, identity risks and compliance at the management level.
• Compliance & reporting: Built standardized compliance reports and dashboards to support internal audits, external assessments and regulatory evidence (e.g. NIS2).
• Architecture & stakeholder alignment: Worked closely with Enterprise Architecture, IT operations and business units to integrate the CITADEL architecture into existing IT and security landscapes.
• Strategic security consulting: Advised programs and projects on Zero Trust compliance, identity centricity and regulatory requirements in the energy and critical infrastructure (KRITIS) environment. Technologies & Methods: Zero Trust Architecture, NIS2, Identity Governance & Administration (IGA), IAM, RBAC, SoD, Entra ID, SailPoint, Zscaler, Terraform / IaC, Policy as Code, security KPIs, compliance reporting, NIST 2.0, ISO 27001, Enterprise Security Architecture, governance frameworks, risk & control management

Project: Scalable AI Workbench Platform on Microsoft Azure Role: Cloud Architect & Engineer Company: Siemens Energy Description: Design, development and operation of a secure, modular cloud infrastructure to support Data Science, Machine Learning and AI applications for various engineering teams at Siemens Energy. Responsibilities & Achievements:

• Cloud architecture: Designed and implemented an Infrastructure-as-Code solution (Terraform) for automated provisioning of Azure resources (Resource Groups, Storage Accounts, Cosmos DB, Application Insights, networking, PostgreSQL Flexible Server, Azure Container Apps, Azure Container Registry).
• Developer portal: Used Backstage with custom frontend and backend plugins (Node.js, TypeScript, React.js, PostgreSQL, Container Apps) to enable self-service and empower developers, data scientists and AI/ML engineers.
• Role-based access control: Implemented Azure RBAC to grant targeted access (e.g. Storage Blob Data Contributor, Reader) to engineering groups (e.g. AI Engineers) for relevant resources.
• Data platform engineering: Built and configured a multi-layered storage landscape (Raw, Curated, Vector data), including automated container creation and access control for advanced analytics and AI workloads.
• DevOps integration: Integrated with Azure DevOps for CI/CD pipelines to automate deployment, monitoring and compliance.
• Security & compliance: Implemented Private Endpoints, network policies and Managed Identities to ensure data protection and regulatory compliance.
• Collaboration: Worked closely with cross-functional teams to align the cloud infrastructure with business and technical requirements and drive digital transformation at Siemens Energy. Technologies: Azure, Terraform, Azure DevOps, Cosmos DB, Application Insights, Azure Storage, Private Endpoints, Azure Synapse, Azure Machine Learning, Azure Entra ID, RBAC, Backstage, Node.js, React.js, PostgreSQL, Python (automation), Git

• Participated as a public speaker regarding leadership and transformational topics at the WeAreDevelopers World Congress with 15 thousand visitors.

• Senior program director and enterprise architect with nearly 30 years of operational experience in HR, ERP, security, risk management, finance, PLM and SLM.
• Expertise in IT program and project management, engineering, process management and organizational development.
• Experience working for the world leader in service management software, rail transportation and a leading tier 1 automotive supplier.
• Subject matter expertise in finance, automation processes, logistics, ERP and PLM and integration, including related end-to-end lifecycle data management and enterprise architecture.
• Specializes in managing large and complex engagements, programs and projects from demand, idea and strategy to operation, including stakeholder and change management.
• Expertise areas: HR, ERP, SecOps, integrated risk management, supply chain and operations, finance, SLM, product strategy, lifecycle management, shared services, IT and PLM.
• Industry experience in technology, tier 1 automotive, transportation and logistics, manufacturing, high technology and software industries, banking and insurance, and railway.
• Experience with SecOps (security incident response and vulnerability management), digital portfolio management, integrated risk management, service portfolio management and business continuity planning.
• Experience defining and designing integrated risk management including security and operations (response plans), CMDB initiatives and shared service implementations.
• Implemented integrated risk management including digital business continuity plans, disaster recovery plans, digital maturity assessments and security risk registers.
• Technology skills include SAP, HR, time and attendance, ERP, PLM, ALM, ITSM and CAD systems.
• Experience with cloud-based services and master data management.
• Familiar with TOGAF, IT4IT, SAFe and PPM.
• Project client exposure to companies such as Siemens, BMW, Daimler, BASF, Bayer, Bosch, DHL, DB Schenker, ServiceNow, Bombardier, KION, Johnson Controls, Schaeffler, Deutsche Telekom, SAP, FEMSA, CEMEX, Nestlé, Heineken, Air France/KLM, Airbus, Vodafone, Majorel, Virgin Trains, Equinor, ASML and Volvo.
• Holds a master’s degree in informatics and a bachelor’s degree in applied economics.

• Transformation management for the renewal of core insurance systems
• Overall management of the transformation program with 10 projects and many subprojects
• Advising the management board
• Designing the new insurance processes
• Ensuring compliance with DORA, GDPR and BaFin
• Program management (multi-project management) based on PMI principles
• Continuous coordination with all service providers and internal stakeholders
• Reporting to all stakeholders
• Preparing and running steering committees
• Detailed task and resource planning
• Tracking effort and budget as well as forecasting
• Decision and escalation management
• Managing the different program phases such as solution design phase, agile implementation phase, test phase, training phase and migration phase
• Building 15 cloud environments in redundant data centers
• Preparing iterative rollouts to European countries