CompTIA Security+

Creation of concepts for the M365 implementation, especially Tenants, EntraID, EntraConnect, and ExchangeOnline, taking into account the BAS standards (mandatory baseline security requirements) in the “M365 Concept” project, with the goal of transferring the concepts to the M365 environments of Bitmarck and subsequently handing them over to the customer.

• Creation of an as-is analysis of the existing M365 environments as well as the on-premises environments and BAS standards.
• Creation of concepts for the topics Tenants, EntraID, EntraConnect, and ExchangeOnline, taking into account the BAS standards
• Design and implementation of an automated solution for creating standardized M365 tenants based on Microsoft M365 DSC (Desired State Configuration)
• Transfer of the concepts to the M365 environments
• Creation of detailed technical documentation

• Overall leadership of several strategic operations projects focusing on Workplace Services, SLA Framework, access management, certificate management, e-learning, backup & recovery, test management, and capacity management, as well as the introduction of system monitoring and feasibility studies for 24x7 operations, in some cases including implementation in ServiceNow
• Creation of various ServiceNow operating concepts covering training, access rights, and emergency management as part of a new cloud hosting initiative for the ServiceNow platform
• Executive board reports and leadership of steering committees as part of company-wide strategic objectives, as well as the establishment of new balanced scorecards for measuring KPIs related to optimization-driven project results

• Strategic planning, detailed technical preparation and operational management of an email gateway migration in a security-critical government environment.
• Preparation of the technical specification and development of technical concepts and migration approaches in line with BSI requirements.
• Technical requirements management with business units, information security and operations.
• Coordination of external service providers, integrators and implementation partners; maintenance of project plans, milestones, resources, risks and dependencies.
• Regular reporting to project management, the program environment and internal stakeholders.

• Functional requirements management for DIVID, the Umweltbundesamt platform for administering the single-use plastics fund. Focus: entitled parties, sub-entitled parties, and benefit reports.
• Consolidation and analysis of specifications, Jira, Confluence, functional concepts, and UX designs. Independent structuring and delimitation of requirements, as well as identification of contradictions, gaps, and dependencies.
• Creation and quality assurance of implementable user stories with clear, testable acceptance criteria. Preparation of decision alternatives and coordination with business, development, UX, and QA through team refinement.
• Conducting manual and technically assisted accessibility tests. Coordinating findings with QA and the Product Owner for further planning and implementation.
• Result: more consistent requirements, clearly defined processes and stories, and transparent open decisions. Separation of assumptions from confirmed requirements; better basis for implementation, refinements, and QA test cases.

Tools used: Jira, Confluence

• Requirements management, process planning, interface function, ISMS setup, and documentation
• Setup and establishment of an ISMS according to ISO 27001 and establishment of emergency management / ITSCM
• Coordination of the circumstances with the public-sector IT service provider
• Consideration of KRITIS relevance within the scope and implementation of a B3S
• Development of requirements for document control and the continuous improvement process
• Preparation of relevant project documents
• Analysis of existing processes and preparation of guidelines
• Requirements gathering for ISMS and ITSCM and coordination with the IT service provider, including definition of interfaces
• Analysis of communication processes and escalation paths
• Review of documents for risk management, ISMS, emergency preparedness, and emergency response
• Redesign of the complete documentation and preparation of new relevant documents
• Development of necessary rules, policies, and concepts
• Interface between customer and service provider to ensure document quality
• Coordination of protection needs with specialist departments, particularly regarding KRITIS relevance, and planning of resulting measures
• Development of preventive measures to minimize the risk of data center outages in scenarios such as pandemics or ransomware attacks
• Definition of the test strategy for IT emergency exercises
• Initiation of necessary awareness training measures for specialist departments
• External Information Security Officer
• Introduction of document control

• Completed the integration of log sources into Microsoft Sentinel, including GCP workloads – centralized consolidation of all security-relevant events from Azure and GCP environments for complete end-to-end telemetry and comprehensive compliance evidence
• Developed custom rules and use cases based on the GFG Use-Case Library and the MITRE ATT&CK Matrix to cover company-specific threats and GFG-relevant scenarios with precise, mapped detection rules
• Tuned detection rules to minimize false positives, optimized detection thresholds, and modeled exceptions – enabling the SOC to work with relevant, prioritized alerts while reducing Mean Time to Detect/Respond
• Built SOAR capabilities in Sentinel by developing playbooks to automate recurring response processes such as containment, user and host isolation, and ticketing – shorter response times and 24/7 scalability
• Designed and built a log transformation solution to normalize and enrich incoming raw logs (GeoIP, CMDB, threat intelligence) and convert them into a consistent schema for high-performance KQL queries, use case logic, and correlations
• Managed Azure security through Azure Policies to enforce security and compliance standards, prevent drift, and continuously remediate deviations
• Operated the Defender XDR portal to link endpoint, identity, email, and SaaS signals with Sentinel findings, enable holistic incident triage, and orchestrate measures directly from XDR

Technologies: Microsoft Sentinel, Microsoft Defender XDR, Azure Policy, KQL, GCP, MITRE ATT&CK

• Industry: Insurance, Trade, IT
• Customers & Projects: Consulting and selling insurance and similar services
• Main tasks: Insurance consulting (health insurance, retirement planning, wealth building); commercial services, inside and field sales; sales data analysis and forecasting; customer consulting and support; opening a new sales headquarters for private and business customers; business development & innovation management; business use case development; process optimization; stakeholder management; team leadership and training; preparation and delivery of trainings;
• Technologies used: Microsoft Office 365, Microsoft Teams, Jira, Draw.IO, Camunda 8, Java (8, 17,21,25), Git, Spring Boot, Spring Batch, Spring Data REST, Spring Web, Spring Security, J-Unit, Playwright, Lombock, Vaadin, H2, PostgreSQL (16, 17 18), pgAdmin, Docker, LLMs, JasperSoft Studio, JasperReports

As part of this project, the existing active network infrastructure was modernized and made fit for the future. The goal was to introduce a powerful, secure and scalable network and WLAN infrastructure, including a Network Access Control (NAC) solution to improve network security and centralized access control.

At the beginning of the project, a comprehensive requirements analysis was carried out, taking into account the technical, operational and security-related requirements of the hospital sites. On this basis, a technical tender was prepared for new switches, WLAN access points and the NAC solution.

The successful implementation of the project established a modern, standardized and secure network infrastructure that meets the growing requirements for availability, mobility and IT security in hospital operations.

Activities:

• Supporting the tender process, including technical evaluation of offers and bidder evaluation
• Leading and managing the entire project implementation
• Coordinating the project process with internal stakeholders, business units and hospital IT
• Managing external service providers during the implementation and installation of the systems
• Monitoring the implementation, including quality control, project acceptance and defect management
• Coordinating and managing communication between hospital IT and external service providers as part of the NAC implementation
• Managing escalations in the event of technical and organizational challenges
• Ongoing budget monitoring and control of project expenses and additional costs
• Preparing decision papers for management on project changes, additional services and risks

Project: Defect Generation on Test-Bench Images of Metal Surfaces Environment: Automated Visual Inspection (AVI), Metallurgy & Manufacturing

• Objective & Implementation: Designed, architected, and trained Generative Adversarial Networks (Pix2PixHD / SPADE) for image-to-image transformation. Targeted generation of synthetic material defects (e.g., cracks, inclusions, scale) on rough metal surfaces under real test-bench lighting conditions for privacy-compliant and efficient dataset expansion (data augmentation).
• Technical Design: Implemented robust Generative AI and computer vision pipelines in Python and PyTorch. Used semantic segmentation approaches for mask-controlled defect synthesis and subsequent evaluation with EfficientDet object detection models.
• Business Impact: Massive dataset upscaling (10x) without time-consuming and costly physical test-bench runs, while significantly improving the detection performance of automated inspection systems.

Technologies & Skills Used: Python | PyTorch | SPADE | Pix2PixHD | EfficientDet | Machine Learning | Semantic Segmentation | Computer Vision

• Development and implementation of tailored information security strategies

• Introduction and further development of ISMS according to ISO 27001, BSI baseline protection, and other standards

• Risk management and creation of security concepts

• Consulting for KRITIS, PCI DSS, TISAX, and VdS 3473/10000

• Building and improving security organizations

• Creation and implementation of guidelines, policies, work instructions, and process descriptions

• Audit support and certification preparation

• Conducting trainings, workshops, and awareness campaigns

• Selection and consulting on the introduction of IT security solutions such as SIEM, DLP, IDS/IPS, firewalls, and encryption technologies

• Conducting penetration tests and vulnerability analyses

• Consulting on the selection, integration, and management of security architectures in complex IT environments

• Consulting on ITSM and managed security services and SOC

• Leading and managing complex projects to improve information security

• Process analysis, optimization, and management according to ITIL, ISO 27001, and cybernetics

• Introduction and quality assurance of management, documentation, and knowledge management systems

• Support in complying with regulatory information security requirements (e.g. GDPR, HIPAA, SOX, GMP, KRITIS)

• Development and implementation of risk analysis procedures

• Organizing initial response, forensic investigations, and organizational measures in the event of security incidents

• Designing and running targeted workshops on topics such as ISMS, IT risks, and current threat scenarios

• Awareness campaigns to promote security culture in companies

• Special trainings on ISO 27001, BSI baseline protection, KRITIS, and other relevant standards

• Simulations and exercises to prepare for information security incidents

• Interim management for leading information security projects or IT security organizations

• Taking on the role of an external CISO (Chief Information Security Officer)

• Support in developing and implementing IT security and corporate strategies

• Coaching and mentoring of managers in the field of information security

• Building and leading security departments as well as recruiting and qualifying employees

• Temporary assumption of management responsibility in critical situations

• Developed a browser-based platform for Kubernetes no-code deployment and cluster management
• Developed a CLI in TypeScript to deploy resources in the cluster without leaving the browser UI.
• Implemented DevSecOps pipelines: image scanning, SBOM, policy enforcement, supply-chain security, and used Kyverno. Implemented IAM integration for the command-line utility tool.
• Designed role and permission models for Keycloak, OAuth/OIDC, and social login flows.
• Used LLMs to convert user intent into diagrams.
• Worked on integration with multiple sovereign clouds like StackIT, Hetzner, CIVO, UpCloud, plus public clouds like AWS, GCP, and Azure
• The technology stack includes Java, Spring Boot, Kubernetes, OpenAI, Kubernetes multi-tenancy using vCluster, Karpenter, RBAC for CLI, Helm, React

• Built a customized MediaWiki instance, including installation, MySQL database, SSL, and automatic backups
• Set up user roles (Admin, Mod, Verified, User) and a permissions system
• FlaggedRevisions for editorial review workflows · Commenting and rating extensions

AI-supported document processing and inventory management integration

Design and development of an AI-supported application for the automated processing of delivery and invoice documents, connected to SelectLine ERP. Documents are analyzed using AI, matched with orders and line items, and prepared for posting goods receipts.

IMPACT:

• Automated extraction of structured order, delivery and invoice data from PDF and image documents
• Automatic and manual mapping of documents to orders and order line items
• Integration with SelectLine ERP for order import, status synchronization and goods receipt postings
• Traceable processing through separate analysis, mapping and posting processes as well as technical logging
• Development of a containerized end-to-end architecture with AI analysis, workflow automation and relational data storage

KEYWORDS: AI, document analysis, OpenAI, n8n, SelectLine ERP, FastAPI, Python, JavaScript, MariaDB, Docker, REST API, PDF, OCR, mapping, inventory management, goods receipt, workflow automation

• Expert in the company's architecture management area

• Support for standardizing the company's IT landscape

• Further development of architecture management

• Shaping the company's business architecture

• Restructuring, administration and maintenance of all IT assets

• Support in creating a unified software asset management and CMDB

• Creation of unified document management (e-file)

• Transition of documents into a central DMS structure

• Link between architecture management and the department's internal business process management

• Support in developing strategic and tactical development plans

• Organizing communication with key stakeholders

• Support in the conception, organization and coordination of the architecture office to be built up

• Accompanying and advising the entire architecture management process

• Advising the company's business units on architectural topics and their framework conditions

• MS Office, Windows 10, VBA

• ITIL, TOGAF, PowerBi, Kanban, Scrum

• Internal agency tools

• Open Touch Conversation, Webex, wire, bdbos

• MS Sharepoint, JIRA, Confluence

• ARIS, Archimate, BPMN