Join GmbH
Michel Fritzsch
From system administrator to enterprise search expert to AI expert – with a foundation in infrastructure, depth in Sinequa and a focus on RAG, CompanyGPT and measurable AI solutions.
Eisenach, Thuringia, Germany
Structure
The homepage is organised into clear areas – from profile and services to case studies, tools, education and contact.
Looking for a project or sparring partner?
For AI strategy, RAG, enterprise search or incident support – best reached directly on LinkedIn.
Profile
My career started in system administration – servers, networks, integration and troubleshooting as a solid foundation. Over the years that grew into enterprise search expertise with Sinequa, relevance engineering and complex search architectures. Today I am an AI expert: I help organizations with generative AI, RAG and corporate AI platforms like CompanyGPT – always with a focus on data sovereignty, governance and real business value.
At Join GmbH I connect all three worlds: operational IT understanding, search and knowledge platforms, and the introduction of AI in the enterprise – from readiness and architecture through pilots to operations.
Good enterprise AI needs more than a model – it needs sources, access rights, governance and measurable relevance.
Foundation
System administrator
Apprenticeship and early years as technical consultant at BSS: infrastructure, integration, monitoring and stable operations.
Deepening
Enterprise search expert
Sinequa, index architecture, semantic search and relevance – knowledge as a central enterprise platform.
Today
AI expert
RAG, generative AI, CompanyGPT and enterprise AI with a focus on GDPR, integration and measurable outcomes.
8+ years at Join GmbH – one continuous path from foundation to AI expertise.
Expertise
From system administrator via enterprise search to AI expert – three stages, one thread
LLMs
Today's focus: corporate AI with CompanyGPT, RAG pipelines and LLM integration – secure, governance-ready and with measurable impact instead of demos alone.
Sinequa Certified Professional
Over a decade of Sinequa practice, index architecture and relevance engineering. Enterprise search is today the foundation for RAG and corporate AI – not a replacement for it.
KI-Strategie
Guiding AI initiatives with business case, stakeholder alignment and realistic roadmaps – from pilot to rollout.
Linux
Where it all began: infrastructure, operations and system integration as the base for stable search and AI landscapes.
Expertise
As a trainer I guide IT apprentices at Join GmbH and teach practical knowledge in system administration, system integration and modern IT infrastructure.
Join solutions
CompanyGPT by Join – the secure AI platform for enterprises and public administration
As an AI expert at Join I guide the path from idea to corporate AI: CompanyGPT for enterprises, RathausGPT for public administration – GDPR-compliant, integrable and with a clear governance framework.
Potential analysis, prioritization and pilot scoping with measurable goals for business and IT.
LLM selection, hosting model (on-prem, EU cloud, hybrid), GDPR and AI Act compliance.
Connect Microsoft 365, CRM, ERP and knowledge sources – including SSO and audit trails.
Training, policies, change champions and phased introduction across departments.
Monitoring, cost control, relevance tuning and expansion to further use cases.
Your corporate AI platform – often described as “ChatGPT for business”. Uses internal knowledge in a GDPR-compliant way, is LLM-agnostic and integrates into global IT landscapes.
RathausGPT as a sovereign alternative for municipalities and authorities – open source, F13-compatible and without data leakage to external clouds.
No sharing of sensitive corporate or citizen data with public AI services.
Roles, policies, audit trails and central model management from one place.
Intelligent search, summaries and answers based on internal sources.
LLM-agnostic architecture – the best model per use case, without vendor lock-in.
Interested in CompanyGPT?
Visit ki.join.de for details on architecture, compliance and use cases. For a personal conversation about your use case, reach me on LinkedIn.
References
Enterprise Search, Microsoft 365/Azure and AI — anonymized insights from long-running client work
Automotive
5+ yearsBuilt and operated a multi-server cloud environment for Enterprise Search across several million documents — including automatic person recognition in content.
A scalable search platform for large document estates in a distributed cloud architecture.
Financial services
10+ years — ongoingLong-term evolution of Enterprise Search plus additional search for public and internal portals.
Consistent search across internal knowledge sources and portal landscapes — continuously operated and extended.
Electrical & energy technology
5+ yearsIntroduced and evolved an Enterprise Search solution for several million documents across complex technical and corporate sources.
Reliable search over large technical and organizational document collections.
Mid-market · Microsoft
Many projectsNumerous projects around Microsoft 365 and Azure — from introduction and integration to operations and evolution in mid-market IT landscapes.
Practical cloud and productivity solutions tailored to mid-market needs.
Mid-market & municipalities · AI
Many projectsMany AI projects for mid-sized companies and municipalities — from use cases and architecture to secure, governance-ready solutions.
Concrete AI applications focused on value, integration and data protection.
All profiles are anonymized and describe typical project types without naming individual customers.
Career
7 years 10 months · since Sep 2018
Sep 2018 – Present
Eisenach
3 years 10 months · Nov 2014 – Aug 2018
Nov 2014 – Aug 2018
Eisenach
Qualifications
My Education
IT Specialist for System Integration
Andreas-Gordon-Schule Erfurt
Graduated June 2014
Training as IT specialist for system integration remains the solid foundation for infrastructure, integration and troubleshooting in complex customer projects.
As Trainer
Training IT apprentices at Join GmbH – practical, structured and focused on enterprise IT.
Join GmbH – IT Specialist System Integration
The training area with learning path, subnetting, tasks, exam simulation, oral exam and glossary is available on dedicated sub-pages.
FAQ
Connect
Interested in AI strategy, CompanyGPT, RAG or enterprise search? I look forward to connecting.
Contact exclusively via LinkedIn.
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