Christoph Kelzenberg
Lead Data & Customer Platform Congstar - Deutsche Telekom Ag @congstar
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WORK HISTORY
Lead Data & Customer Platform Congstar - Deutsche Telekom Ag @congstar
Cologne, DE
Product Owner for the Medallia Customer Experience Management platform, delivering insights across 7M customers.Designed and implemented a CX data architecture aligned with congstar’s data strategy, ensuring high-quality and consistent data.Embedded real-time customer feedback into product and service optimization, driving measurable improvements in satisfaction and retention.Acted as bridge between business and technology, enabling AI & data-inspired steering at scale.
EDUCATION
RWTH Aachen University
Master of Arts - MA, Communication services
SKILLS
ABOUT CHRISTOPH KELZENBERG
Driving Growth with Data & AI — creating Customer Delight and Loyalty!For me, Data & AI are more than numbers and algorithms – they are the key to creating customer experiences that inspire loyalty, deliver measurable business value and make companies more data inspired, customer-centric and successful.With 20+ years of experience, I’ve been building and leading international Data & Analytics teams, developing strategies and platforms, and translating complex data landscapes into clear decisions.I enabeld retail and telco companies leverage Data & AI to engage customers, cut costs, and accelerate growth. Proven impact at congstar, Telefónica, REWE, Eis.de & Kaiser+Kraft – where I delivered measurable transformation, from unlocking multi-million revenue potential to boosting customer satisfaction by double digits.Data platform architecture | Databricks | Power BI | Medallia | Qualtrics | AI/ML (Mixed-Media Modelling, ChurnPrediction, Sentiment Analytics, Forecasting)| Data Governance | Digital Analytics | Adobe Analytics | Google Analytics | GT4 | Tage Management | Tealium | Mouse Tracking | Mouse Flow
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