Martin Bausewein-IT Architect
Experience
IT Architect
NDA defense industry
- Evaluation of a modernization concept for IT infrastructures including client workstations
- Development of an alternative concept focused on data sovereignty and reducing provider dependencies
- Selection of suitable alternative open-source products and solutions
- Design of a proof of concept approach for step-by-step evaluation of the options
IT Architect
Daimler Truck AG
- Building an application stack in a VPC (IBM Cloud) to fully separate Mercedes-Benz infrastructures
- Setting up and switching VPN connections, including network and firewall configuration
- Rebuilding RHEL8 VMs with business applications (including nginx, traefic proxy for OIDC) and Oracle database (multi-stage)
- Optimization and hardening of components: hardening all components; monitoring stack with notifications (Telegraf, InfluxDB, Grafana); IDS/IPS stacks (firewall, fail2ban, clamAV, lynis); COS backup
Transition Manager
Bilfinger SE
- Interim reinforcement of the project team in WAN/LAN outsourcing worldwide for around 700 locations
- Responsible for vendor management during WAN/LAN discovery as well as planning transition and migration in the areas of WAN, LAN, service management, and NOC
Project manager
Planta GmbH
- Consulting, analysis, and design to customize standard planning systems for individual customer requirements
- Successful implementation of multi-project and portfolio management systems in traditional and agile environments
- Leading the introduction of a hybrid planning system for the Baden-Württemberg police
- Managing a proof of concept (PoC) to evaluate planning systems for the Ministry of the Interior of Baden-Württemberg
Transition Manager
cunova GmbH
- Lead architect for non-SAP applications and security in a carve-out project
- Analysis of on-premise IT and OT legacy systems, design of the future hybrid IT landscape, planning the migration, and managing the service provider for building the hybrid solution
- Assessment and advice on implementing findings from a security audit of the divesting company and development of an IT security concept
- Selection and management of IT service providers, establishment of an ITSM framework, and technical leadership of the migration
- Support and consulting during the transition to regular operations
IT Architect
Daimler AG / Daimler Truck AG
- Building a multi-stage VPC environment as part of the division separation
- Managing the cloud risk process and implementing security requirements
- Planning and executing or coordinating the setup of the VPC including migration, testing, and data cleanup
- Implementing an OSS monitoring and notification stack with integration of application and operational services; backup and disaster recovery concepts; hardening and monitoring; VPN connection, VPC network architecture including zones, policies, DNS; OIDC integration of the application
- Operation in the Application Management Service (AMS)
IT Architect
NDA Insurance
- Designing an archive system for searching customer/insurance data after SAP shutdown
- Defining PoC reports for the search
- Data model including roles and permissions concept of the archive system
- Developing an operation model and implementing a container-based PoC (Docker Compose stack) with PostgreSQL database; admin container for data import; Tomcat application server with automatic certificate generation; BIRT engine with defined MVP reports
IT Architect
NDA Automotive Supplier
- Consulting and feasibility analysis of a data crawler for consolidating data from various internal and external systems
IT Architect
Mercedes Benz / Daimler Truck / Daimler AG
- Creating a migration concept for the system landscape (Windows, RHEL, Kubernetes) from IBM Cloud to AWS
- Developing modernization strategies for legacy applications for Kubernetes operations, improving security and cloud maturity with the introduction of a service mesh
- Setting up a VPC with BYOK in IBM Cloud for rehosting legacy applications, including base configuration, system hardening, monitoring concept, and coordination of the installation team
- Cross-environment monitoring with Prometheus & Grafana for all components in the VPC stages (Kubernetes tenant, Windows and Linux VMs) with dedicated security audits, certificate and backup checks; central log stack with Elastic Stack (Elasticsearch, Kibana, Logstash)
- Implementing hardening measures for Linux systems (RHEL, SuSE, Ubuntu) and specifying changes for custom developments
- Designing and executing migrations from on-premise, private and off-premise clouds into IBM Cloud VPC
- Conducting PoC projects to evaluate modernization options for application architecture from legacy to container operations
- Supporting security audits, information classification, and cloud risk processes, and deriving technical requirements and solutions
- Project management for switching providers of a media archive and preparing to eliminate a supplier dependency: process analysis and redesign; interface redesign; concept for decoupling systems and migrating data; managing service providers and internal project teams
- Responsible for AMS operations of distributed applications on Linux and Windows servers
- Designing on-premise system and data migration concepts with minimal downtime
- Requirements, release, and test management for the system landscape in the after-sales area
Root server operations
Bausewein IT GmbH
- Operating and administering Linux servers (Debian, Ubuntu, RHEL) with a focus on security, performance, and stability
- Setting up and running various server services: mail service (postfix, dovecot, SpamAssassin, rspamd, ClamAV); databases (PostgreSQL, MariaDB/MySQL, Redis, InfluxDB); ticketing (Mantis BT); IoT stack (InfluxDB, MQTT, Grafana); monitoring (Telegraf, InfluxDB, Grafana); security (lynis, rkhunter, ClamAV, fail2ban, ufw, crowdsec); virtualization (Proxmox, KVM, Qemu, Docker, Kubernetes)
- Continuously evaluating system hardening and security concepts
Industry Experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Automotive, Government and Administration, and Insurance.
Business Area Experience
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Experienced in Information Technology, Operations, Project Management, and Business Intelligence.
Summary
With many years of comprehensive IT experience – including over 15 years in enterprise environments – I offer companies strategic and operational excellence in designing, securing, and transforming complex IT landscapes.
I combine deep architecture and technology know-how with project experience in international corporations and mid-sized companies. My focus is on IT strategy, cloud/legacy architecture, IT security, and transition management, especially in migrations, carve-outs, and infrastructure modernization. I stand for analytical thinking, a goal-oriented approach, a pragmatic work style, and audience-appropriate communication.
Skills
- It Strategy & Enterprise Architecture (Ibm Cloud, Aws, Hybrid Clouds, Vpc, Byok)
- It Architecture & Infrastructure Modernization
- Transition & Migration Management, Carve-outs
- Planning & Control Of Complex Migrations (Cloud / Hybrid / Legacy)
- It Security, Hardening, Audit Support (Infrastructure & Processes)
- Open Source Stack (Monitoring, Mail, Security, Databases)
- Provider Management & Itsm Frameworks
- International Project Experience In Corporate Structures
- Project Management & Technical Consulting
Languages
Statistics
Experience
Global Experience
Expertise
Profile
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