OSI Model Experts in Germany
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Meet FRATCH Experts in Germany, who have recently used OSI Model
Jens Schneeweiß
Last position:
Network Technology at ISP, Internet Service Provider, BGP Peering
- Optimization of the transmission media of the data links in the Ruhr area
- Configuration/expansion of switches and routers for an autonomous system AS
- Improve the network protocols used Layer 2/3 (OSI model), RSTP, broadcast, etc.
- Laying cables, crimping, antennas, routers, switches
- Maintenance, expansion, selection and prioritization of troubleshooting measures for network monitoring (PRTG, The Dude)
- Organization and new connection of another BGP peering, data center, NGN fiber optic
- VPN IPSec site connections for 6 sites with PFSense, Fritzbox
- Configuration of WLAN devices (Mikrotik, UBNT
Label: TCP/IP, VLAN, BGP, OSPF, MPLS, VPLS, routing protocols, WLAN, EoIP, PPPoE, routing, SNMP, DHCP, DNS, NAT, native IP, VLAN, Ethernet, VoIP., switches and routers from: Nortel, Cisco, MikroTik, UBNT., network management systems: The Dude, PRTG, UISP
Ola Van Dunen
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Andre Kholodov
Last position:
Nearshore Engagement Manager at EnBW AG
- Built strong awareness of nearshoring within the company
- Engagement Manager in the Nearshore Competence Center
- Responsible for nearshore consulting, partner screening and technical onboarding, designing and implementing cooperation scenarios, change management, stakeholder management, participating in steering committees and collaborating with IT and business units
- Tools used: Microsoft Office 365, Microsoft Teams, Azure DevOps, Microsoft SharePoint, Conceptboard
- Key results: established a nearshoring strategy, successfully identified and implemented outsourcing partnerships, executed change management and stakeholder management at a top level
Luca Pacor
Last position:
ERP Program Manager at Fiserv
The client is undergoing a comprehensive transformation. All SAP ECC landscapes worldwide are being migrated to SAP S/4HANA, with the goal of introducing a global standard template.
The program also includes the migration and modernization initiative "RISE with SAP", which may involve migrating selected country installations to the SAP Private Cloud.
On the stakeholder side, the program's reporting line extends up to the company's board and the implementation partner's board.
Fiserv Germany's ERP landscape currently includes several non-standard SAP tools and applications that extend the ECC environment's functionality and often integrate with downstream systems. As part of the move to SAP S/4HANA, it is essential to assess the core functionality, integration points, and future viability of these applications to determine their alignment with the target architecture.
The focus of the role is to provide expert advice and assessment to define the scope, strategy, and roadmap for migrating Fiserv Germany's SAP ECC system to SAP S/4HANA.
SAP's recommended best practices are followed, and a structured approach is used to ensure a smooth transition with minimal disruption while maximizing business value.
This assessment forms the basis for a successful SAP S/4HANA transformation, ensuring alignment with industry best practices, regulatory compliance, and future scalability.
Migration strategy definition – evaluating available transition approaches based on business objectives, technical feasibility, and SAP best practices.
Technical readiness assessment – conducting a system analysis to assess compatibility, custom code impact, data volume management, integration points, and infrastructure readiness for SAP S/4HANA.
Business process impact analysis – reviewing the latest business process documentation to define the scope and effort needed to implement required functions in SAP S/4HANA and identify process optimization opportunities.
Roadmap for non-SAP systems and applications – evaluating third-party and legacy applications for SAP S/4HANA integration and recommending consolidation, migration, or replacement strategies.
Deployment & implementation planning – defining a phased rollout approach, including project timelines, risk mitigation strategies, and key milestones aligned with business priorities.
The transformation is carried out in phases: the discovery phase leads to the explore phase, which then leads to the design phase and finally to the implementation phase.
Program management
Change management
Requirements management
Transition management
Stakeholder management
Risk management
Comprehensive coordination
Silvia Biedermann
Last position:
Business Consultant - Product Management Banking at Aareal Bank AG
- Focus on EBICS optimization and further development of the customer’s internal EBICS application
- Business and technical consulting for Aareal First Financial Solutions AG on products and applications of the EBICS standard in the areas of operations and further development, as well as project-related communication with external development partners and the product vendor to map the relevant optimizations on a technical level
- In the role of business coordinator, consulting on content-related and regulatory requirements as well as technical prerequisites and needs, and consolidating these on a business level
- Consulting on the use of EBICS formats
- Review of the current EBICS standard for potential optimizations and further development
- Analysis of the current state to identify further development potential and derive suitable recommendations for action, taking regulatory requirements into account
- Carrying out EBICS tests during the project
- Responsible on a business level for requirements management, and in this context capturing and documenting requirements for such tests
- Design of a functional and long-term test management approach
- Execution and evaluation of tests
- Consulting on sustainable quality assurance and audits
- Project languages: German and English
- Tools/methods: MS Project, MS Office, MS Visio, TestRail, Confluence, Jira, Business Logics Bank Rechner, Business Logics test data generator, Business Logics banking tool, Business Logics test system, DBEAVER, Squirrel, Unix virtual machines, WinSCP, Kitty, PuTTY, various Aareal Bank products, online banking portal, Aareal Sign, core banking system, SAP Blue Eagle, SAP RE-FX, Aareon Wodis Sigma, Haufe Real Estate Wowinex, GAP Group Immotion, UTS Karthago, SAP IS-U/Waste, SIV kVASy, various EBICS clients
André Görst
Last position:
IT Consulting Project Management / Engineering Subproject Management at T-Systems (on assignment for government agencies)
- Projects for federal networks (NdB).
- CR management, EoL change requests, design and documentation according to ITSCM.
- Data center planning.
- Project management and engineering subproject management.
- Software development for virtual server environments according to BSI.
Andreas Zimmermann
Last position:
ITSM Consultant at Industrial company / Global IT division
- 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
Björn Auel
Last position:
Project Manager at DB InfraGO
Project Elevator Emergency Call Reorganization: Project to evaluate and define a new technical solution for connecting elevator emergency calls across all DB InfraGO passenger station facilities.
Objectives: Secure redundant connectivity for all sites nationwide. Define the technical solution, document it, and provide thematic oversight and control of specialist and line organizations.
Identify and commission the technical solutions.
Manage the documentation and approval of the technical solution within DB regulations.
Define and follow up on the roadmap for the solution description.
Develop a rollout plan to prevent shutdowns.
Prepare, align, and implement decision proposals for steering committees.
Communicate the solution in all committees and regional departments.
Dirk Eichler
Last position:
Senior IT Engineer at IT service provider
- Planning, concept design, re-design
- Pre-sales support
- Project support according to PRINCE2
- Setup of a CMDB
- Implementation of communication processes
Varsha Sehrawat
Last position:
Embedded Engineer (Working Student) at Lautsprecher Teufel GmbH
- Proficient in using JIRA for sprint planning, bug reporting, and task management.
- Modified and enhanced embedded C/C++ firmware code on STM32, ESP32 and ARM-based MCUs and SoCs.
- Debugged and fixed embedded software issues; managed code with Git/GitLab (commits, merge requests, reviews).
- Created and maintained test cases and test plans using Testmo.
- Debugged and validated firmware builds; provided detailed bug reports.
- Executed manual tests across development stages.
- Familiar with RTOS concepts and implementation, including task scheduling and interprocess communication for real-time embedded systems.
- Managed planning and execution of acceptance and regression testing.
- Supported mobile app and system-level testing for audio streaming device.
- Tested communication protocols (HTTP, I2C, SPI, UART) and API interactions.
- Used terminal tools and SSH to debug embedded Linux systems.
Charles Jakob
Last position:
Network Architect at RedGlobal GmbH
- Configuration of Dell switches, routers, and access points.
- Error analysis and resolution.
- Environment: Extreme, Cisco and Dell switches and routers, Extreme A3 NAC, Extreme CloudIQ.
Tilmann Spahlinger
Last position:
Technical Expert, Software Architect at Rolls Royce Power Systems / MTU
- Created concepts and architecture for ECU diagnostics over CAN-Bus using UDS, PDX, ODX and safety paradigms
- Designed system deployment for EMS and documented using UML, Draw.io, MS Word, MS Visio and Confluence
- Developed process flows for development, planning, logistics, test & diagnostics in Scrum with Jira and MS Planner
- Communicated across multiple customer teams, conducted knowledge transfer
Last position:
Software Developer - Building Automation
- Testing controller ECUs
- Implementing test environment
- Implementing virtual nodes
- Commissioning CANopen network
- Defining and automating test cases
- Designing and implementing LSS automation
- Implementing data exchange between tools
- Porting requirements to XML format for vTestStudio
- Products: CANoe, vTestStudio, Playwright, Cypress, Robot, .NET
- Skills: CAPL, C++, CANopen, concept creation, Python, JavaScript, XML, C#
Andreas Bode
Last position:
Oracle Applications DBA at Pyur
- EBS 12.1 to 12.2.11 upgrade (DB 12 to 19)
- Cloning process automation
- HTTPS migration
- Performance analysis and performance tuning
- Error analysis
- Cloning
- Patching
- Backup and recovery concept analysis and evaluation
- Disaster recovery tests
Oliver Horn
Last position:
Orbis Support at Recura Kliniken Beelitz
- Incident handling
- Error analysis
Discover over 15,000 top freelancers
Statistics of experts using OSI Model
Aggregated from the professional profiles of matched freelancers.
Experience
28 years
Position duration
2.2 years
Positions per freelancer
26
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Manufacturing, Banking and Finance
Certification focus areas
Information Technology, Project Management, Quality Assurance
Bachelor's degree or higher
86%
Master's degree or higher
29%
Certifications per freelancer
4
Most common languages
German, English, French
Speak two or more languages
100%
Based on our profile pool as of 30 Aug 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Germany are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Germany using OSI Model
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 30 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
About the technology
Layer basics
The OSI Model is a reference framework for understanding how data moves across a network. It splits communication into layers, from physical transport to the application layer, so specialists can isolate problems and design systems in a structured way.
Where it helps
- Network troubleshooting and root-cause analysis
- Protocol design and integration work
- Security reviews across traffic paths
- Documentation for system and network teams
- Training for clear cross-team communication
Common work
Companies bring in OSI Model specialists when traffic breaks in ways that are hard to trace. They help map packet flow, compare expected behavior with real network traces, and explain where a fault belongs in the stack. In Germany, this is often useful in distributed enterprise environments and cross-border infrastructure work.
Tooling and methods
Strong experts use packet capture tools, protocol analyzers, logs, and diagrams together. They understand TCP/IP, Ethernet, DNS, HTTP, and common transport issues, then relate them back to the relevant OSI layer. That skill makes it easier to pinpoint whether the issue sits in cabling, routing, session handling, or the application itself.
What good specialists do
- Explain layered problems in plain words
- Trace failures from symptoms to the right layer
- Work cleanly with network, security, and application teams
- Separate protocol facts from assumptions
- Document fixes so they can be repeated
When to hire
Bring in freelance expertise when incidents repeat, migrations are unclear, or teams disagree on where a fault starts. The best professionals do more than name layers; they connect the model to real traffic, real systems, and real business impact. That is what makes the OSI Model useful in practice, not just in theory.
Frequently asked questions
The facts hiring teams ask for most often when it comes to OSI Model.
The OSI Model is used to structure network work into clear layers, so teams can understand where communication fails. It helps with troubleshooting, protocol analysis, architecture discussions, and security reviews. In practice, it turns vague network problems into a step-by-step investigation.
OSI Model knowledge gives a clean conceptual map, while TCP/IP is the more practical stack used in day-to-day systems. Good specialists usually know both and can move between the two without confusion. If a team only knows one, they may miss where a problem really starts.
A strong OSI Model specialist usually understands TCP/IP, Ethernet, DNS, HTTP, routing, switching, and packet analysis. Security basics matter too, because many incidents involve traffic paths, firewalls, or session behavior. Clear documentation and communication are also important.
A OSI Model freelancer can often start with a small amount of context if packet captures, logs, or diagrams are available. The more complex the environment, the more useful it is to share network topology, system boundaries, and recent changes. That lets the specialist focus on the right layer quickly.
For many OSI Model tasks, remote work is enough because packet traces, logs, and diagrams can be shared securely. On-site can help when physical network issues, cabling, or local infrastructure need direct inspection. In Germany, many teams combine both depending on the incident and access rules.
A good OSI Model professional explains the problem in layered terms and shows how they reached the conclusion. Look for clear reasoning, not just terminology. Strong answers should connect symptoms, evidence, and the fix without jumping straight to assumptions.
OSI Model expertise is useful in incident response, network redesign, protocol integration, and security analysis. It also helps when teams need to document how systems communicate or prepare for a migration. Any project with unclear traffic behavior can benefit from this kind of structure.
Not always, but a OSI Model issue that looks small can hide a deeper network or application problem. If the task is a simple layer check, a practical specialist may be enough. If multiple systems, vendors, or teams are involved, deeper experience usually saves time.
The average hourly rate of freelancers in Germany who have used OSI Model in their recent projects is 103 €, which corresponds to a daily rate of about 821 € based on an 8-hour working day.
Of the freelancers in Germany who have used OSI Model in their recent projects, 86% hold at least a Bachelor's degree and 29% hold at least a Master's degree.
On average, freelancers in Germany who have used OSI Model in their recent projects have 28 years of professional experience, with a single engagement typically lasting around 2.2 years.
The most common languages among freelancers in Germany who have used OSI Model in their recent projects are German (100%), English (100%), and French (32%).
The most common industries among freelancers in Germany who have used OSI Model in their recent projects are Information Technology (89%), Manufacturing (79%), and Banking and Finance (63%).
The most common business areas among freelancers in Germany who have used OSI Model in their recent projects are Information Technology (100%), Product Development (89%), and Project Management (79%).
Main locations of FRATCH Experts, who have recently used OSI Model
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
Berlin Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg Request a free demo
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Philipp Thomaschewski
FRATCH CEO
