Symantec Experts in Germany

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

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

• Analysis of requirements and the current situation
• Migration of an old domain structure and Tobit to Exchange 2019 with integration to MS365
• Evaluation of implementation paths and planning for securing sensitive data
• Planning regarding BSI basic protection, the German Federal Data Protection Act (BDSG), and GDPR
• IT governance and IT security backtests
• Support with ERP setup and securing mail transfer
• Hyper-V 2016/2022, Microsoft Terminal Services Cluster, Microsoft Exchange 2019
• Office 365, Microsoft 365, Azure AD, Teams, Salesforce
• Cisco, Zyxel, and HP switches, Sophos firewalls/UTMs, SecurePoint
• Microsoft IIS 2022, IPv4/IPv6, Veeam, Wortmann online backup, NextCloud
• Services: DNS, DHCP, TCP/IP, subnetting, firewalling, routing, VoIP, Group Policy (GPO), SIEM, remote work, home office, high availability, failover, VLAN, PRTG

• ITSM consulting, analysis and optimization of IT capacity with BMC TSCO / BMC Helix
• Drafting "Governance guidelines for operational capacity management"

• Overall coordination of service providers for all infrastructure topics at a production site being set up in Baden-Württemberg
• Design and finding solutions for internet connectivity, building office communication networks, setting up WLAN in production and administration buildings, IP address management, password policies, time tracking, access control systems, backup strategies, emergency power planning, operating concepts, cost planning, event management, workplace setup including laptop/mobile phones/telephony, remote support, print servers
• Selecting suitable external service providers and planning to meet needs for spare parts, repairs, on-site service, network and workplace support including on-site system replacement by providers
• Choosing suitable external service providers for facility management and building technology (fiber optic connections, data center infrastructure, cable ducts etc.)
• Coordination with clients and service providers
• Escalation management, schedule control
• On-site presence for service meetings and managing service providers

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.

• Designed and specified the technical network integration of a new business-critical application system (MUREX) in the capital markets area in a complex interface and outsourcing environment.

• Created component specifications, a catalog of measures and an implementation plan.

• Ensured proper integration of the developed results in line with the bank’s framework: IT compliance, IT security, change and release management.

• Selected and integrated a new service provider for the bank; moved critical bank applications to the provider.

• Designed, implemented and supported the new Cisco network and Fortinet security setup at the service provider data center.

• Acted as technical interface between the bank, service providers and consulting partners.

• Supported and further developed the network and security infrastructure (clients, servers, networks); performed error analysis and implemented solutions within agreed service levels.

• Analyzed and diagnosed all security and network failures, glitches and malfunctions.

• Initiated continuous improvements to ensure efficient resource use and acceptable response times for users.

• Provided network support in a financial services organization and prepared operational changes on production banking network infrastructure for both large and small projects within strict change management discipline.

• Designed, defined, tested, governed and improved engineering standards.

• Performed the role of network architect for medium to large projects involving team resources.

• Datastage 11.7, dbt, Oracle 19, Python 3.12 / PySpark 3.5, Azure GitHub, Azure DevOps, Automic
• Development of migration jobs to transfer data from the collection DWH to the new Risk Mart, as well as development of ETL pipelines to migrate historical data from the old Mart to the new Risk Mart.
• Storage of the silver layer on Hadoop and the gold layer in Oracle.
• Translation of DataStage jobs into dbt to publish reporting data in Google Cloud to a PostgreSQL database.
• Creation and optimization of complex SQL queries for data extraction from a data vault, taking into account historical data in the point-in-time tables.
• Creation of Oracle table definitions (DDL) and adjustment of existing stored procedures.
• Versioning changes in GitHub and deployment via the CI/CD portal.
• Refactoring long-running DataStage jobs into Python using PySpark to reduce server load.
• Migration of SAS scripts to PL/SQL, including new development of distribution functions that have no direct equivalent in Oracle.
• Development of Automic jobs to run DataStage pipelines and Python scripts (PySpark jobs) that control the population of the SME and institutional risk tables in the Risk Mart and perform business calculations.
• Participation in the agile process, including creating user stories, estimations, and planning in Azure DevOps.
• Handling Azure DevOps tickets and close collaboration with testers and business teams for error analysis and resolution.

• Redesigning cablewise infrastructure with CAT 8.1 keystones, measuring the speed and quality of the new installation with Pockethernet, documentation at a local saddlery
• CAT 8.1 installation and building a data center, site linking, VPN and VLAN configuration for a local car dealership, implementation of IT-Security standards like virus protection (G Data) and firewalling (OPNSense)
• Relocation of a tax office with redesign of the IT infrastructure, virus protection (G Data) and backup solutions (QNAP)
• Planning, conception and implementation of an inhouse data center, BSI-compliant for commercial laundry (including Proxmox-based virtualization of existing infrastructures, QNAP, G Data, OPNSense, APC)
• Implementation and conception of security solutions in the SME sector
• Collaboration on the IT-security concept for the Bremen network of authorities (in the dLAN network)
• Creation of IT-security concept VOIS (modules MESO, KFZ/iKFZ) including audit preparation for KBA
• Expansion of the IT-security concept for the online service for electronic residence registration (eWA) to include use as an eFA (one-for-all) service (nationwide)
• Expansion of the IT-security concept to include modules wos & wvp
• Concept development for the implementation of DIN SPEC 27076 at MSEs and SMEs
• Creation and evaluation of emergency concepts
• Creation and evaluation of response actions and BCM plans
• Assessment of existing business continuity management (ISO 22301)
• Development of BCM strategy options
• Conducting awareness training

• Project manager controlling the update to ISO 27001:2022 (certification from ISO 27002:2013 to ISO 27002:2022) including gap analysis, project planning, preparation of internal and external audits, and creation and maintenance of required documentation.
• Coordination of adjusting existing measures and implementing new measures according to the new standard’s requirements, as well as continuous monitoring and adjustment of these measures.
• Regular reporting to management on progress and risks.
• Senior consultant supporting audit reviews with a focus on critical infrastructures (KRITIS), including resolving findings, creating and updating evidence documents, and amending provider contracts.
• Senior consultant reviewing all deliverables and responsibilities of the IT provider according to the existing contract: identification of over 1500 deliverables & obligations (D&O), setup of a D&O tracker (claim register), and joint expert review with service owners for various service descriptions (e.g. IT service management, workplace and print services, application and desktop services, endpoint management, email including archiving, file services, software packaging, certification, distribution).
• Senior consultant adjusting service scopes in existing service descriptions to enable end-to-end service responsibility of the provider, including identification and analysis of use cases, process analysis and optimization (incident, problem, change), as well as recording and documenting all software products in LeanIX and documenting the contract change.
• Focused services: managed software service, application and desktop service, workplace and print services, web server service, container service, M365, SAP/Oscare, output management systems (OMS), telephony and omnichannel management service.
• Project manager steering a benchmark based on the existing IT contract, including coordination of the entire benchmark process between the benchmarker, IT provider and client, review of benchmark results, and preparation and conduct of price negotiations with the IT provider.

• Analysis and further development of the security architecture.
• Design and development of Splunk apps and technical add-ons (TAs).
• Development and implementation of security use cases in the Splunk SIEM.
• Creation and maintenance of incident response playbooks in Cortex XSOAR.
• Support of technical proof-of-concepts to assess new detection technologies.
• Lifecycle management and operational support for Splunk and Cribl systems.
• Deployment and scaling of Splunk indexers in hybrid data center environments.
• Maintenance, update planning, and optimization of Cribl Stream & Edge for log ingestion and data routing.
• Creation of dashboards and reports to visualize security posture and system availability.
• Technical analysis to assess network topologies and data flows.
• Integration of new data sources via Cribl Stream/Edge and heavy forwarders in cloud and on-prem environments.
• Integration of external security components such as Cortex XSOAR (SOAR) and user behavior analytics (UBA).
• Implementation of complex correlation rules in Splunk Enterprise Security (ES).
• Connection of external ticketing systems via mail gateways and REST APIs.
• Automated deployment of use cases, dashboards, and detection rules via Git and Ansible.

• Project support for VMware/Active Directory
• Operational support for administration, process execution
• Creation and review of documentation
• Active Directory, Powershell, VMware VSphere 7, Confluence, Jira
• Windows Server 2016/2019/2022/2025 GUI/Core
• Concept and rollout of Windows Update Services (approx. 500 client/server systems) and takeover of a central WSUS gateway company-wide
• Takeover and redesign KMS/RDS systems company-wide

• Designed and implemented a new user support tower organization as part of the global IT transformation initiative.
• Created an operating and control model for the central service desk, including downstream support units (field service, VIP support, service points).
• Performed a comprehensive as-is analysis of existing service desk and field service structures and developed a target architecture based on ITIL 4 and SIAM.
• Defined roles, responsibilities, and governance mechanisms for internal IT and external providers.
• Prepared the blueprint document Service Management & Governance Handbook (User Support) to standardize global service processes (incident, request, problem, change, knowledge, ITSCM, CSI).
• Developed a KPI and SLA framework to measure service quality and performance in global user support.
• Defined the reporting and review structure (operations meeting, service review meeting, management steering board).
• Prepared RFP documents for the external tendering of L1/L2 support services, including definition of scope, governance model, process requirements, tool integration (ServiceNow), and KPI/SLA sets.
• Supported procurement and legal departments in evaluating and negotiating vendor proposals and assisted in vendor selection and contract finalization.
• Oversaw the handover to operational support, including knowledge transfer, training of provider teams, and establishment of a continuous improvement process (CSI).
• Methods / framework / tools: ITIL 4 / ITSM, SIAM, IT4IT, ServiceNow, Jira, BPMN, operating model canvas, KPI & SLA design, governance & performance management

• User account management and creation in Active Directory
• Group management and modification in Active Directory
• Permission 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

• Support for the transition to the provider
• Quality assurance in developing operations manuals
• Operational performance management of the provider