Co-CEO
Sebastian Dahm
Operating models, decision intelligence and implementation lead. Translates the reality of mid-sized and enterprise organisations into AI operating models that work productively with frontier models.
Team
The people who bring
AI into your organisation.
Rinascai combines a permanent partner team with a network of experienced senior experts. The partners own strategy, architecture and delivery; the senior experts bring the specialist depth a given mandate needs — from regulatory questions to technical implementation.
Partners
Management team.
Co-CEO
Stefan Wetzler
Strategy, board-level dialogue and implementation support. 20+ years of operational experience on the client side and in CFO- and CEO-level advisory for mid-sized companies and corporate groups.
CFO
Dr. Johannes Wollenburg
Finance, structure, build & brand. Designs engagement architectures that combine AI-first thinking, economic viability and scalability.
CTO / CPO
Jean-Luc Winkler
Product and technology. Owns the Rinascai AI Suite, architecture, tool stack and engineering delivery.
Certifications
CSO
Michael Witzenleiter
Consulting, go-to-market and brand. Translates AI capabilities into offerings that decision-makers understand and organisations can actually implement.
Certifications
COO
Benjamin Brüser
Operations and delivery. Owns assessment, governance tooling and the stable running of client mandates.
Senior Experts
Specialist depth,
when the mandate calls for it.
Our senior experts complement the partner team with specialist experience in regulation, data architecture, processes and change. They join per project — with the same accountability for the outcome.
Sebastian Tenti
Senior Expert · Power BI & DWH
Connects operations, numbers and technology. Builds business intelligence that does not stop at the dashboard but triggers a decision.
- Power BI & reporting architecture
- Data warehouse & data modelling
- Data quality & software QA
- Supply chain & logistics processes
Florian Felsch
Senior Expert · Cloud & AI
Solutions architect with 12+ years in distributed systems and cloud architecture — from event-driven design to hands-on delivery.
- Event-driven architecture & Kafka
- AWS & Azure cloud architecture
- Java, Kotlin & Spring Boot
- RAG pipelines & AI infrastructure
- API design & microservices
TOGAF EA FoundationiSAQB CPSA FoundationAWS Cloud PractitionerAzure Fundamentals
Hannes Windisch
Senior Expert · Fabric & BI
30+ years of database and BI experience. Builds data warehouses and analytics pipelines — today with Microsoft Fabric and Power BI.
- Microsoft Fabric & Power Platform
- Data warehouse architecture
- MS SQL Server & database design
- Power BI & data analytics
- Python for data science
MS Exam 462: SQL ServerPython for Data SciencePattern Discovery (Mining)
Jan Schürmeier
Senior Expert · Data Engineering
14+ years in data & analytics, founder of Simplience. Turns complex requirements into understandable, maintainable data solutions.
- Data engineering & ETL pipelines
- Databricks, Fabric & Azure Synapse
- Data Vault & data modelling
- Spark, PySpark & Azure Data Factory
- Power BI & report design
SAP Data Services 4.x
Nicolas Kadner
Senior Expert · Payment
Cuts payment costs by 20–40% and simplifies payment processes. 10+ years in e-commerce, retail and payment method management.
- Payment strategy & method portfolio
- Tenders & provider negotiation
- Checkout & conversion optimisation
- Payment compliance & data protection
- Interim management & project lead
Felix Welter
Senior Expert · IT-Security
IT security expert for security operations and AI-supported threat detection. Experience in e-commerce, public sector and finance.
- Security operations & SOC
- AI-supported threat detection
- Security architecture
- Information security management
GIAC GSOC
Rafael Alex
Senior Expert · UX & AI Design
Designer and developer in one. Makes AI usable — from the user problem through interface and brand to a working product.
- UX & interface design for AI products
- Conversion paths & website audits
- Branding & corporate design
- AI automation (n8n, LLM workflows)
- Rapid prototyping to SaaS MVP
Join the Team
Our expert network grows by curation. Those who join have shaped their field for years and take responsibility for the outcome — not for the presentation.
- 10+ years in the field
- Delivery, not slide decks
- References that speak for themselves