Christoph Kelzenberg

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.

Defined and executed the company-wide data strategy, unlocking new revenue streams from customer & transaction data. Built and scaled a 16-person BI & Analytics team, transforming the organization into a data-inspired & customer-centric company. Implemented a modern cloud-based Data Platform, cutting reporting effort by 70% and fueling e-commerce growth. Led marketing effectiveness initiatives with AI-driven Mixed Media Modeling, reallocating spend to achieve >€5M savings while safeguarding revenue

Directed 5 BI & Analytics units (25 FTEs) across Europe, consolidating fragmented teams and driving collaboration. Championed data culture across international business units, positioning analytics as a true growth driver. Accelerated insight delivery and decision-making, strengthening customer-centric steering across the group. Saved €8M through AI-powered marketing efficiency analyses by reallocating budgets and maximizing ROI

Founded a consultancy focused on Customer & Business Intelligence. Developed a BI & CX methodology toolbox to help clients establish data-driven strategies. Acquired and managed clients across multiple industries.

Built and led an 18-person analytics team, embedding analytics into REWE’s digital transformation journey. Drove omnichannel analytics & AI initiatives, improving marketing ROI and customer insights. Acted as strategic advisor to senior management, enabling better and faster data-driven decisions. Achieved €6M savings with a Machine Learning forecast that enabled more efficient steering of marketing and logistics departements

Established and grew the Web Intelligence Unit, defining strategy, processes, frameworks & KPIs. Introduced an A/B testing framework that fostered a customer-centric culture, improving customer satisfaction by +8pp and driving ~10% revenue growth Supported strategic business initiatives with data-driven insights for marketing, product, and digital channels.

- Qualitative und quantitative Analysen im B2C und B2B Umfeld mit nationaler und internationaler Ausrichtung - Websiteoptimierung - Durchführungen von Ad Hoc Studien, Online-Website-Evaluationen und Usability Labs - Multi-Client-Studien / Online-Benchmarking Analysen zu Themengebie-ten Automobil, Banken, Firmen-Extranet / -Intranet - Durchführung von Online-Kundenzufriedenheits- und Mitarbeiterbefragungen - Einführung und Weiterentwicklung von Methoden und Tools

Web Analytics for Site Optimization; Measuring Marketing Campaigns Online; Creating and Managing the Analytical Business Culture;

E-Commerce