Nmap Experts in Germany

• Work within time-critical operating procedures; coordinate issues with customers, partners and central support.
• Maintain reliable handovers and concise incident communication when service, equipment or routing issues occur.

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.

• Completed 25+ hands-on labs focusing on digital forensics, incident response, and advanced threat hunting techniques.
• Earned top-tier badges in malware analysis, enterprise log analysis, and threat intelligence gathering.
• Developed specialised skills in forensic report writing and evidence collection methodologies to support incident investigations.

• Worked on FPGA enhanced network encryption device with secure boot, TPM2.0 and smart card integration for BSI approved usage with Post Quantum Cryptography
• Developed and audited Linux drivers
• Collaborated using GitLab, Gerrit, Confluence and Jira
• Technologies: C, C++, Secure Boot

• Performed security assessments and penetration testing on Microsoft AI models for text, image, and video generation.
• Conducted prompt injection attacks through diverse input vectors, including crafted text, steganographic images, and manipulated visual elements (e.g., varying opacity and embedded content).

• Linux server migrations: planning and execution of the migration with SLES Linux deployment of VMs in VMware 8.0
• Guiding colleagues on configuring Linux VMs with vSphere Auto Deploy
• Application operations: ensuring smooth operation of applications on migrated servers
• Operations manuals: revising existing manuals, updating and creating new ones as needed
• Reviewing service offers: adjusting and optimizing service offerings of external providers
• Logistics software, Red Hat Linux, Ansible, Confluence / Jira

• Planned and executed black-box adversarial testing of traffic-sign computer-vision pipelines; produced a threat model and attack-surface analysis for safety-critical scenarios
• Built a programmable hardware proof of concept using a holographic POV fan and a repeatable test harness to run real-time experiments and collect evidence for vulnerability assessment
• Quantified misclassification across lighting, distance, and angle, achieving up to 90% untargeted misclassification; delivered steps to reproduce, PoCs, and prioritized mitigations, and documented limitations and residual risk

Supervised the course Software Engineering for Bachelor students and delivered lectures.

• Developed a custom tool using the Mistral 7B LLM to scan, validate and report security vulnerabilities.
• Security tested AI agents, bots, and other LLMs with a focus on prompt injection, model inversion, data poisoning, EDR/AV bypass and evasion techniques, membership inference, model evasion, overfitting to malicious inputs and contextual manipulation.
• Onboarded repositories to SAST solutions for security scanning, implemented secrets scanning, DAST, SCA, and utilized ZAP for DAST in CI/CD pipelines.
• Engaged in security awareness trainings, developed CTF challenges and training materials to enhance developer security knowledge.
• Planned and executed bi-annual red teaming operations based on the MITRE ATT&CK framework and led internal and external pentests based on the OWASP Top 10 framework for 70+ applications worldwide, resulting in detection, reporting, and remediation of hundreds of vulnerabilities.
• Triaged HackerOne reports.

• Created as-is network documentation for a Bechtle customer
• Analyzed existing configurations and adjusted them
• Advised on Fortinet and Check Point products
• Troubleshot complex routing, switching and application issues
• Tools: MS Azure, FortiManager, Cisco Nexus & Catalyst, Cisco WLAN Controller, Citrix Netscaler SD-WAN, MS Visio, Checkpoint VSX, Wireshark

• Embraced full-time caregiving while achieving B2 German fluency
• Advanced cybersecurity skills through hands-on training at Masterschool
• Worked with AI & LLM tools: ChatGPT, Claude, Gemini, prompt engineering basics, LLMs, AI-assisted writing tools

• Drafting company agreements related to data protection
• Acting as a mediator between business interests and data subject rights in a corporate context
• Process analysis and evaluation regarding data protection and information security implications according to GDPR, BDSG, BSI baseline protection
• Support for information security audits according to ISO 27001
• Implementation of change management processes
• Analysis of IT infrastructure and deriving recommendations
• Expert support in legal proceedings and communication with supervisory authorities
• Preparation of data protection impact assessments (DPIAs) and procedure and processing documentation (VVZ)
• Training on corporate data protection and information security
• Cooperation with law firms in legal proceedings

• Risk Management
• Incident Management
• Security Analysis
• Secure Coding
• Information Security Management System (ISMS)