ISO/IEC 27001 Lead Auditor

• Support in building and further developing the information security management system
• Cooperation with external consultants in the certification team for the support structure
• Involvement in project planning, identification, and implementation of the necessary measures according to BSI IT baseline protection
• Professional support for in-house subject matter experts in creating the documents required for certifications
• Carrying out the work according to BSI 200-2

• Innovation/pilot project eHealth Germany
• SaaS company in the media sector, NRW
• Secure software development lifecycle, NRW
• BSI IT baseline protection assessments for multiple clinics

Management of several MFA methods for central authentication within a group company. Interface between different stakeholders such as support, finance and accounting, developers, and security departments. Budget controlling and monitoring of KPIs as well as SLAs. Review of operating documentation

• Design and global rollout of sensitivity labels (confidentiality labels) for automated classification and encryption of business-critical data.
• Definition and rollout of Data Loss Prevention (DLP) policies to protect IP and personal data across endpoints, Exchange, SharePoint, Teams, and non-Microsoft clouds.
• Setup of Insider Risk Management policies to detect and contain excessive data leaks and risky user behavior.
• Implementation of GDPR and retention requirements through automated retention policies and structured records management.
• Technical support for legal teams in internal and external investigations using eDiscovery (Standard/Premium) and Content Search.
• Continuous improvement of the security and compliance level by reviewing the Microsoft Compliance Manager and closing gaps (regulations such as ISO 27001, NIS-2)

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.

• Overall leadership of multiple strategic operations projects focused on workplace services, SLA framework, access management, certificate management, e-learning, backup & recovery, test management, and capacity management, as well as implementing system monitoring and feasibility studies for a 24x7 operation, partly including ServiceNow implementation
• Development of various ServiceNow operating concepts related to training, permissions, and emergency management as part of a new cloud-hosting initiative for the ServiceNow platform
• Board reporting and leading steering committees within the framework of corporate strategic objectives, as well as establishing new balanced scorecards to measure KPIs for optimization-driven project results

• Supported the implementation of §8a requirements of the BSI Act for critical infrastructures.
• Systematically prepared and supported internal and external audits, resolving previous deviations (HA, NA, VP)
• Implemented the specific requirements of the IT security catalog
• Developed training, created run books, and conducted assessments to ensure operational effectiveness.

• Led 34 specialists in application management and software engineering
• Developed and ran fleet management for 45,000 vehicles for the German Armed Forces using SAP R/3 and SAP S/4 Hana modules
• Provided and enhanced software for rental and leasing business as well as mapping all company processes of BwFPS, including mobile apps
• Supported the electrification of the Bundeswehr vehicle fleet
• Developed and operated cloud-based custom solutions
• Responsible for the security architecture of the entire IT landscape, following the IT security requirements of the Bundeswehr, BSI IT-Grundschutz, and critical infrastructures
• Secured terrestrial communication networks, mobile networks, IT middleware, and applications against cyberattacks
• Migrated the fleet management system to SAP S/4 Hana, achieving efficiency gains
• Developed a complexity index for the IT landscape and reduced it through retirement, modernization, and interface removal
• Used AI models to support procurement processes, knowledge management, and process simplification

• Coordination of the B3S and ISO 27001 implementation project, considering the upcoming KRITIS evidence procedure
• Providing consulting services in ISO 27001, B3S, KRITIS, and IT baseline protection
• Collaborating with the Information Security Officer (ISO)
• Identifying company assets for IT risk management
• Developing a zone concept for IT risk management
• Creating an action plan for B3S
• Developing a template for risk analyses

• Provide consulting services nationwide in both private and public sectors
• Advise on information security management systems, IT-Grundschutz, KRITIS compliance, TISAX, business continuity and crisis management
• Support the introduction of policies, risk management methods, asset registers and supplier management
• Conduct internal audits, training workshops and support audit preparations

• Recognition of national notified bodies
• Preparation of cybersecurity competency reports
• EU Radio Equipment Directive

• Founded and lead a cybersecurity advisory firm focused on virtual CISO services for financial, SaaS, and critical infrastructure clients.
• Advise executive teams on cyber risk, regulatory compliance (DORA, NIS2, ISO 27001), and incident preparedness.
• Built and executed security programs from scratch, driving measurable maturity improvements.
• Delivered tailored risk assessments, policies, and cloud security guidance (AWS, Azure).
• Scaled the business through client acquisition, partnerships (Vanta, AWS, etc), and a network of senior consultants.

• ISMS consulting

• Interim management

• Conducting security analyses & audits

• BCM consulting

• Executive management