ITIL Foundation

• 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.

Introduction of new hospital software

• Supported the introduction and implementation of new hospital software during ongoing clinical operations
• Coordinated and provided operational support for the software rollout in clinical departments
• Delivered user training and guidance to hospital staff to ensure safe and efficient use of the new software
• Explained software features, workflows and new digital processes to the relevant user groups
• Provided on-site support to doctors, nursing staff, medical departments and administrative employees during the introduction and transition phase
• Acted as a First Responder for questions, usage issues and incidents related to the newly introduced software
• Logged, analyzed and initially assessed user issues, and coordinated follow-up with the responsible support team and technical departments
• Helped users transition existing workflows to the new digital processes
• Identified recurring user questions and operational challenges and shared relevant findings with the project team
• Worked closely with project management, IT, the software provider and the hospital's responsible contacts
• Provided ongoing feedback from clinical operations to project management to improve the rollout and user acceptance
• Helped ensure a smooth transition to live operations
• Supported users during the Go-Live and stabilization phase
• Documented support cases, user feedback and open items, and tracked them through to resolution
• Coordinated closely with project management to meet project goals, rollout dates and implementation requirements

• Development of ETL pipelines with Talend (7/ Enterprise)
• Development/adaptation of database schema/database functions (PostgreSQL)
• Development of GIT CI pipelines

Technologies: Talend Enterprise, Git, PostgreSQL, Dbeaver, SQL, PL-SQL, Liquibase

• Consulting on Agile Leadership and Lean Management
• Facilitating workshops
• Training and coaching in Agile Leadership, Lean Management and team development

• Planning, managing, and executing IT projects in network architecture, hybrid cloud solutions, asset management/CMDB implementation, and system hardening (clients, servers, databases)
• Ensuring all projects are delivered on time, within budget, and meet quality standards
• Identifying and managing risks and proactively resolving issues
• Collaborating closely with technical and non-technical stakeholders to ensure project objectives are achieved
• Defining and tracking KPIs and progress reports for all project phases

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

• Analysis of the as-is IAM solutions and their functions
• Definition of the functional scope for the rollout
• Coordination of the internal rollout team regarding roles and activities for the international rollout initiatives
• Stakeholder communication across all countries and divisions, including approval processes for the works councils
• Change management design and implementation for the rollout project, including building a community and conducting community calls with divisions and countries
• Design and implementation of the release management process after the rollout of the minimum viable product
• Support in migrating existing solutions to the new solution
• Rollout execution in the countries and post-rollout follow-up
• Documentation of all processes, functionalities and responsibilities in Confluence

• Client support, 2nd and 3rd level, server administration
• Project and process coordination
• Support for MS365 services
• Linux administration
• Provider management

• Supporting integration testing

• Describing and creating the cut-over playbook

• Conducting workshops to clarify requirements

• Gathering business requirements

• Business process modeling

• IT design

• Project planning

• Supporting migration testing

• Conducting a Greenfield S/4-HANA conversion. A DATEV application and an AS400 are to be replaced with an S/4-HANA system in a public cloud. The general ledger and accounts payable are run on DATEV. The AS400 handles accounts receivable and business partners. Accounts payable and receivable are being migrated to S/4-HANA, and the DATEV solution is being decommissioned.

VALUE ADDED:

The structured analysis and further development of business requirements and processes is driving the modernization of contract administration in a focused manner. Complex business matters and dependencies are made transparent, optimization potential is identified, and transferred into scalable solution approaches that enable as much straight-through processing as possible. This creates clearer and more efficient processes as well as reliable decision-making and implementation foundations for business departments, architecture, and development.

• Development of business requirements and processes for the further development and modernization of contract administration
• Creation and further development of business concepts, process descriptions, and decision-making documents for implementing new and optimized processes
• Analysis of existing processes and identification of optimization potential to simplify and scale processes
• Structuring of complex business matters in a dynamic project environment to ensure transparency and traceability for all involved
• Identification and clarification of business dependencies and interfaces, especially in interaction with adjacent systems and departments
• Contribution to business target models and development of solution approaches for new, scalable processes that also enable straight-through processing
• Leadership and moderation of business workshops to coordinate and further develop requirements with internal stakeholders from business departments, architecture, and development
• Prioritization of business topics and requirements for targeted implementation
• Support with testing, reviews, and quality assurance, including the creation and coordination of business test cases to verify the implemented solutions
• Use of SharePoint and Kanban to document and manage tasks

• Planning, coordination and tracking of the work for database administration (DBA)
• Coordination with the application developers and test managers (QA) involved in the project
• Migration of the existing databases in several stages
• Coordination with and provision of information to stakeholders
• Technologies: MariaDB
• Tools: MS Office, Confluence, Jira
• Methods: Project management according to the customer-specific procedure
• Project language: English / German

• Responsible for the new development of billing and auditing software for prescriptions (prescriptions) to fully check and evaluate e-prescriptions for correctness (content, billing)

• The system consists of several contexts that run as services (Docker containers):

• Checking and processing data deliveries via FTP and email

• Managing invoices, clearings, advance payments and deductions

• Managing and running audit rules and audit folders

• Evaluations based on Metabase

• Developer Stack: Kotlin, Vue 3 / Vuetify 3, ANTLR, Spring Boot 3, REST API, Gradle, Docker, GitLab, PostgreSQL, Kafka, Keycloak, Scrum, Grafana, Loki, Testcontainers, Prometheus