PBX Experts in Germany

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

• User account management and creation in Active Directory
• Group management and updates in Active Directory
• Permissions management on file servers
• Exchange/Outlook support
• VPN setup
• System and product support: Windows 10, Windows 11, Office 2019, Office 365, Active Directory, TeamViewer, RSA VPN, Microsoft Teams, RSA Security Console, Deep Discovery Mail Inspector, ServiceNow, Macmon

• Introduction of an access control solution and preparation of a tender for a visitor management system.
• As project manager, I am responsible for the successful introduction of a cloud-based access control system at two sites with approximately 4000 employees.
• Responsible for the successful implementation of the project.
• Preparation and coordination of project plans and status reports with all stakeholders.
• Preparation/coordination of an initial effort or cost estimate and related planning for the implementation of operational services.
• Identification of interfaces.
• Compliance with the budget and schedule.
• As Tender Manager / Demand Manager, I am responsible for the following specific tasks:
• Analysis of potential providers.
• Elicitation of requirements.
• Preparation and coordination of the requirements catalog.
• Preparation of an evaluation matrix.
• Preparation of tender documents.

Topics:

• Further development of the CRM system NKAM and technical separation of “direct” and “indirect” sales
• Redesign of the discount management area and outsourcing to another system.
• Designing numerous improvements on the wholesale side to reduce manual effort down to the level of user stories.

Europe-wide re-platforming & centralization

• Independently created the migration concept and implementation plan for the Europe-wide centralization and consolidation of IT services for around 20 European companies as part of a re-platforming program.
• Migration assessment: analysis of the existing IT, infrastructure, application, and service landscapes of the companies as the basis for the migration strategy.
• Development of the centralized target vision and target architecture based on a modern technology stack, taking platform and containerization approaches into account.
• Design of a highly available central infrastructure in an active-active model across two data centers; consideration of cloud, infrastructure, application, CMDB, and IAM services.
• Development of the migration and transformation roadmap, including defining migration waves, dependencies, requirements, and priorities for the move from decentralized services to the central platform.
• Analysis of technical and organizational dependencies, identification of migration risks, and development of a structured approach for step-by-step migration and centralization.
• Creation of target, solution, and implementation views for each service domain; design of the end-to-end join-move-leave process as a blueprint for the European rollout (Jira/Jira Asset Management).
• Alignment of migration strategy and roadmap with European companies, management, IT, providers, and other stakeholders; presentation of the 12-month roadmap to the Managing Director Europe.

• Conceptual consulting for securing business processes
• Consulting for planning and implementing IT and IT security projects
• Security and policy checks, process optimization, contingency planning
• Project management and interim management in IT infrastructure and information security

Overview of relevant projects:

• 2025: Consulting on a DLP concept and for Digid GmbH.
• 2025: Consulting for a customer after a cybersecurity attack in which the IT infrastructure was compromised and the attacker gained M365 tenant admin rights. Investigation and recovery of the IT infrastructure. Preparation of recommendations for increasing IT security.
• 2025: Continuation of the projects listed below for Thyssenkrupp Marine Systems and Norddeutsche Landesbank.
• 2024: Preparation of a DNS concept including consulting on DNS strategy and technology, DNS design, DNS security, load balancing, reverse lookup zones and automation. Preparation of a DHCP concept including consulting on DHCP design, the central DHCP management system and automation. Consulting on the operation of the products mentioned, operating processes, and adapting the IT documentation and IT service description for Thyssenkrupp Marine Systems.
• 2024: Analysis and assessment of the network and security infrastructure established by the providers with regard to the overall architecture, consisting of the design and components. Development of proposed solutions to improve current operations, maximize performance and security, and reduce complexity. Presentation of the results, their causes and possible solutions to C-level management, including the required decision templates. Development of a SASE concept based on a Zero Trust architecture for Norddeutsche Landesbank.
• 2024: Continuation of the projects listed below for Atlas GmbH and Deutsche Vermögensberatung AG.
• 2023: Consulting on resolving findings from an IT security assessment of the IT infrastructure, conducting proof-of-concepts for DDoS protection and Digital Experience Monitoring (DEM) with Zscaler (ZIA, ZPA & ZDX), creating a new security architecture based on Zero Trust, redesigning a Cisco ISE implementation and designing a DNS security solution to protect guests and financial advisors for Atlas GmbH / Deutsche Vermögensberatung AG.
• 2023: Continuation of the projects listed below for Digid GmbH, Vaillant Group GmbH (until 09/2023), Bundesanstalt für Geowissenschaften und Rohstoffe (until 05/2023) and Union Investment IT-Services GmbH (until 07/2023).
• 2022: Preparation and review of white papers for infrastructure and security architectures, planning new network infrastructures for Deutsches Luft- und Raumfahrtzentrum.
• 2022: Development of a concept for the technical and process-related modernization of a disaster recovery plan for United Nations Volunteers.
• 2022: Development of a concept for moving measurement data to a cloud environment, introducing Network Access Control and conducting an awareness training session for Digid GmbH.
• 2022: Development of a network segmentation concept for DZ Hyp AG.
• 2022: Development of a network segmentation concept for Bundesagentur für Arbeit.
• 2021: Development of a new load balancer architecture for Bundeswehr Fuhrparkservices GmbH.
• 2021: Vulnerability scan and penetration test of a web frontend, including evaluation and preparation of recommendations for remediation, taking risk and probability of occurrence into account, for customer ifi GmbH.
• 2021: Consulting, concept development and sub-project management for introducing a Network Access Control solution (certificate authentication and MAC address bypass) and macro-segmentation (area and zone concept based on dynamic assignment of endpoints) in office and production IT for customer Vaillant Group GmbH.
• 2021: Upgrade and optimization of the LAN and WLAN infrastructure for customer United Nations Volunteers.
• 2021: Development of a target concept for modernizing the IT security infrastructure consisting of the DMZ (Cisco switches, firewalls, WSA, ESA, SMA), internet access, admin and management networks and wireless LAN, including support during implementation, for Bundesanstalt für Geowissenschaften und Rohstoffe.
• 2021: Creation of a micro-segmentation concept based on Cisco DNA and SGT and Zero Trust for Union Investment IT-Services GmbH.
• 2021: Review and update of ISMS Level-3 policies and preparation of process instructions for customer Software AG.
• 2021: Project management for the global Tec-Refresh project Meraki WLAN 2.0, coordination of outsourcing the LAN/WLAN infrastructure to a managed service provider and preparation of a WLAN concept for automated guided vehicles for customer Heraeus Infosystems GmbH.
• 2021: Project management and technical support for the “Transition of SIEM/SOC Services” project of a customer into a shared environment and assumption of the interim role of Head of Security Operations at customer Datagroup SE.
• 2021: Workshop for a future implementation of Mobile Device Management at customer Allgeier Experts Go GmbH.
• 2021: Sub-project management for introducing a rule management tool for firewalls and recertifying NAC endpoints based on 802.1x and MAB at customer Union Investment IT-Services GmbH.
• 2020: Development of a network segmentation concept for two data centers based on Cisco and VMware for Aareon AG.
• Recording and analysis of the current network architecture, including project initiation.
• Development of a concept for micro-segmentation in the data center and access network.
• 2020: Infrastructure and security architecture audit for customer Stuttgarter Versicherung AG.
• Analysis of the IT infrastructure and IT security architecture with regard to the configuration of network and security components. Additional review of contracts, process descriptions and manuals for completeness. Development of recommendations to improve the stability and operation of the infrastructure. Preparation of a network segmentation concept and project management for implementing the measures from the analysis project.
• 2020: Consulting on setting up an ISMS-Light for customer Josera foodforplanet GmbH & Co. KG.
• 2020: Security architecture consulting for customer Datagroup SE.
• Development of a future IT infrastructure and IT security architecture.
• Analysis of the current IT architecture of all 23 companies.
• Recommendations for optimizing the IT infrastructure and preparation of a comparison between a classic perimeter security concept and the Zero Trust model.
• Preparation of a security zone concept.
• Preparation of an IT infrastructure architecture in coordination with all companies.
• 2018 - 2019: Stream Lead in the Cyber Security program of Deutsche Lufthansa AG.
• Responsible for designing and implementing 9 projects in IT security infrastructure and user access management, as well as managing project managers and experts.
• Project area: Network Segmentation and Access Control.
• Project area: Security Architecture.
• Project area: Privileged, Identity & Access Management.
• Project area: Simplify User Authentication (MFA).
• Project area: Mobile & Endpoint Security.
• Project area: OT Security.
• Project area: E-enabled Aircraft.
• 2018: Security architecture consulting for customer Deutsche Lufthansa AG.
• Project management for the development, evaluation and management of the company-wide information security architecture.
• Development of a security strategy and roadmap to align the security architecture with the Zero Trust model.
• Evaluation of security solutions, services and tools available on the market.
• Definition of requirements for RfPs and evaluation of offers.
• Development, maintenance and monitoring of security architecture artifacts.
• Conducting security assessments of existing and new IT systems and security services.
• 2018: ISMS consulting for customer GLS IT Services GmbH.
• Consulting on introducing and initially operating an ISMS based on ISO27001.
• Auditing the IT environments of the GLS country companies.
• Analysis and assessment of IT security risks and derivation of required measures.
• Development of proposed solutions in coordination with the relevant stakeholders.
• Project management and transition of the ISMS to later operations.
• 2016 - 2018: Security Pre-Sales Consultant for customer Cisco Systems GmbH.
• Nationwide strategic and conceptual consulting for major enterprise customers and financial and insurance customers on Cisco and Meraki security products and services such as Firepower, WSA, ESA, Stealthwatch and ISE.
• 2017 - 2018: Design and implementation of an ISMS for customer Verivox GmbH.
• Conducting various BIAs and GAP analyses.
• Preparation of security policies based on ISO 2700x.
• Assumption of the interim role of Information Security Officer.
• 2017: Preparation of a contingency concept for VPV Lebensversicherungs-AG.
• Review and update of the IT contingency manual.
• 2016: Consulting and project management for the design of cloud and hosting services for customer Vodafone Group Services GmbH.
• Analysis and optimization of the sell-build-run process.
• Preparation of detailed-level designs for cloud products.

• Optimization of business results and expansion of sales activities
• Responsible for personnel organization
• Introduction of a document management system (DMS)
• Introduction and optimization of the ERP, CMS and CRM landscape
• Introduction of digital signatures
• Increase in revenue, reduction in costs and increase in EBIT

• Processing and coordination of IT tickets (Helix, Omnitracker) incl. VIP support and remote support (Microsoft Teams, RDP, FastViewer)
• Onsite support at the main location as well as support for modern conference and meeting room technology (e.g. MeetingBoard 75 Pro)
• User and rights management in Active Directory (Active Roles), Azure AD, Exchange and MDM
• VDI support and monitoring with Citrix Director and Aruba Networking
• Endpoint management and policy administration via Ivanti
• Deployment, configuration and lifecycle management of clients (Dell notebooks, iPhones, iPads)
• Hardware rollouts for new employees incl. shipping across Germany
• Asset and license management as well as organization of site migrations

Project: Rollout of new infrastructure components

• Defined and managed the implementation of an overarching management framework with clear roles and responsibilities as part of the hardware rollout.
• Designed and established governance and control mechanisms, including the development of compliance requirements and processes for continuous quality assurance, supported by ServiceNow.
• Coordinated technical activities between service, infrastructure and specialist teams to ensure the smooth delivery and commissioning of printers and notebooks.
• Created a detailed rollout plan with specific timelines, milestones and responsibilities.
• Managed the procurement, delivery, testing, configuration, installation and on-site commissioning of hardware, including integration into existing IT systems.
• Established and continuously optimized processes for the procurement, distribution and use of printers and notebooks.
• Developed and implemented standardized provisioning processes, analyzed existing procedures, harmonized the processes involved and ensured compliance with security, compliance and quality requirements.
• Introduced agile methods to continuously improve the hardware provisioning process.
• Promoted collaboration through clear responsibilities and communication structures between internal IT teams and external service providers.
• Documented and monitored rollout progress, created rollout reports and tracked hardware implementation in real time.
• Supported change management and organized and delivered training sessions for end users.
• Created user manuals and online resources.
• Analyzed the existing hardware landscape, created hardware inventories, assessed current equipment and checked hardware compatibility.
• Developed detailed infrastructure mappings.
• Planned, organized and conducted structured interviews with key stakeholders and created requirements documents.

Strategic AI consulting for management, identification, assessment and prioritization of agentic use cases, training for the development team and management

My work at Liebherr Electronics and Drives GmbH was highly rewarding, both professionally and personally. During this time, I was responsible for designing, developing and delivering training measures in the areas of high-voltage technology, energy storage systems and high-voltage battery repair. My responsibilities also included digitizing and optimizing training materials, teaching current safety and quality standards, and providing practical training for specialist staff.

Due to the permanently long commuting distance between my home in Karlstein and my place of work, I decided to focus my professional future on my home region again in the long term.

Activities & Skills:

• Technical training and legally compliant concept development in the following areas: teaching knowledge in electronics, high-voltage systems, high-voltage energy storage systems, high-voltage battery repair
• Structured analysis of technical relationships and troubleshooting
• Creation, digitization and optimization of technical training and work documents
• Reviewing and improving quality standards.

Participation in various projects related to the development and introduction of new telecommunications products in the mobile communications and fixed-line sectors, with a focus on 5G, wholesale and IPv6 technologies.

• Planning, coordination and execution of product development projects, particularly in the 5G and fixed-line environments
• Support for the rollout of new offerings, including test management and quality assurance
• Participation in the development of wholesale products and eSIM solutions
• Close coordination with internal departments (technology, marketing, operations) and external partners
• Use of agile tools and methods for project management and collaboration

Tools: JIRA, MS Office, MS Project

Technologies: 5G, 5G Campus Networks, Fixed Network (FixNet), IPv6, eSIM, Wholesale product development

CS-APN 5G NSA – IPv6 / Dual-Stack for B2B Customers

Ensuring the use of CS-APNs in dual-stack mode (IPv4/IPv6) in combination with MPLS VPN and IPSEC VPN.

• Project management including test planning, test coordination and go-live management
• Technical coordination for activating IPv6 functionality for B2B connections

eSIM Manager – Product Development for B2B Customers

Development of a tool for the fast and scalable provision of eSIM profiles for business customers.

• Product design and process definition for activating eSIMs on different device types (smartphones, IoT, laptops)
• Collaboration with partners to integrate the solution into existing infrastructures

eSIM Handling B2B – Blanco eSIM Process Integration

Optimization of the eSIM provisioning process through the introduction of dynamic Blanco eSIM processes.

• Definition of new processes for issuing non-activated eSIMs (Blanco) via the frontend and partner community
• Design of the integration into service and IT systems

All-IP 5G NSA – Mobile Access for B2B Internet/Voice Services

Expansion of the All-IP portfolio with mobile 5G access offering higher bandwidth for business customers. (5G Indoor Coverage).

• Project management including test management and go-live preparation
• Interface coordination for introducing Local-SIM-based solutions

5G PN – Campus Roaming / Private Networks

Development and introduction of 5G Private Network (PN) solutions with a focus on industrial applications (IIoT).

• Design and definition of business use cases
• Development of SIM/eSIM processes for 5GPN, including roaming between private and public networks

IPv6 for B2B – Introduction in Mobile and Fixed-Line Products

Introduction of IPv6 support for All-IP products and M2M services in the B2B environment.

• Product and process development for integrating IPv6 (in accordance with RIPE-554)
• Implementation for large customers such as retail chains with several thousand branches in Germany and abroad

• Requirements analysis and replacement of local SharePoint as CMDB with open source NetBox to prepare for deploying Cisco ACI (SD-WAN) with Microsoft Azure
• Coordination with systems like Checkmk and Grasp
• Introduction and coordination of cmdbsyncer as CMDB data hub; further development of the syncer with Kuhn & Ruess GmbH
• Implementation of SNMPv3 on AIX LPAR/VIO, Linux, Windows, SAN/storage, network components (Cisco switches, F5 load balancers, Palo Alto and CheckPoint firewalls, iLO boards)
• Deployment and further development of the network scanner JDisc in cooperation with the vendor (Utimaco HSMs, Linux detection)
• Integration of NetBox, JDisc, and cmdbsyncer into the infrastructure using Docker containers
• End-user training: preparation, creation of materials, and delivery
• Creation of data flow and network diagrams
• Population and planning of IPv4/IPv6 with NetBox including VLAN import
• Dual-stack setup of servers and clients with IPv4 and IPv6
• Connection of REST interfaces for Checkmk, JDisc, vSphere, HMC, i-doit, NetBox Software: Confluence, Jira, MS Office 365, Teams, i-doit, NetBox, JDisc, cmdbsyncer, DB Visualizer, vSphere, HMC

INTRODUCTION OF AI OPERATING SYSTEM & DEVELOPMENT OF DIGITAL INFRASTRUCTURE

Technology / Start-up – Munich, 3 employees

Objective:

Selection and implementation of an AI operating system, development of a structured knowledge base, and creation of AI agents and skills to increase efficiency across the entire company

• Requirements analysis and evaluation of suitable AI operating systems based on the company’s specific needs
• Design and development of a central knowledge base as the foundation for AI-supported processes
• Development and configuration of AI agents and skills for recurring business processes
• Prompt engineering for precise, context-based outputs from the AI agents
• Personal coaching for the founders and employees on using AI independently and effectively
• Overall project management, including planning, prioritisation and progress tracking
• Documentation of the implemented solutions and creation of usage concepts for sustainable operation

Tools: Langdock, SharePoint, Prompt Engineering, AI agents, AI skills