Marek Piotrowski

Owned a high-volume rebate payout workflow by building a single-script automation that secured accurate client distributions of $20M/month while reducing cycle time by 98.6%. Implemented strict cross-database validation controls and delivered financial forecasting and executive reporting to C-suite and directors.

Developed advanced regression models in Python/R to isolate key drivers in sensitive remuneration datasets and support executive decision-making. Built rigorous data cleaning and integrity workflows to ensure accuracy for high-liability, client-facing advisory deliverables.

Architected and maintained scalable enterprise BI dashboards by integrating disparate data sources and data warehouses to support reliable reporting services. Led delivery streams and stakeholder management, converting ambiguous requirements into durable technical specifications for production analytics platforms.

Supported full lifecycle BI implementations including requirements gathering, dashboard architecture, and maintenance of reporting layers. Delivered consulting outcomes for multinational accounts by aligning reporting design and data structures to measurable operational KPIs.

Automated recurring data preparation and reporting workflows using VBA, Python, and R to reduce manual processing and improve operational reliability. Managed large-scale data validation and extraction across relational databases to ensure integrity of survey-based reporting for hundreds of participating entities.

Executed data validation, cleansing, and extraction tasks across relational datasets to support Compensation & Benefits reports. Supported recurring reporting cycles by improving internal processes and documentation for repeatability and quality control.

Master of Science in Data Science from the Polish-Japanese Academy of Information Technology, completed in February 2022.

Bachelor of Arts in Finance, Accounting and Insurance from the University of Warsaw, completed in June 2019.

Achieved the AWS Certified Cloud Practitioner certification.

Holds a Cambridge C1 Advanced English language certificate.

Holds a Goethe-Zertifikat B2 German language certificate.

Earned MicroStrategy BI certifications including Mobile Architect, Application Architect, Analytics Architect, Architect, and Analyst.