Hire the Best Six Sigma Specialists
in Hungary

Overview Hi, I’m Dezső. With over 10 years of hands-on experience in data manipulation and analysis, I specialize in transforming raw data into actionable insights. My expertise spans Excel, Python, and Exploratory Data Analysis (EDA), backed by a strong foundation in AI/ML mathematics and theory. Whether you need to streamline workflows, troubleshoot complex tools, or extract meaningful patterns from data, I deliver efficient, reliable solutions. Technical Skills - Excel Mastery: Advanced formulas, VBA automation, Power Query, and custom macro development. - Python Programming: Scripting, data transformation, and automation for small to mid-sized projects. - Data Analysis: EDA, statistical modeling, and visualization (e.g., Pandas, NumPy, Matplotlib). - AI/ML Fundamentals: Strong theoretical knowledge of machine learning algorithms and mathematics. - Web Scraping: Data extraction and integration into structured formats. Why Work With Me? - Proven Expertise: Designed and troubleshooted Excel tools for diverse industries, including creating automated dashboards and training teams on analytics best practices. - Problem-Solving Focus: Skilled at reverse-engineering workflows, debugging code, and optimizing processes. - Clear Communication: While my English is conversational (not native-level), I prioritize clarity, transparency, and meticulous attention to detail. Availability - Flexible Hours: Available weekdays 5–8 PM CET and weekends for urgent or ongoing projects. Let’s Collaborate! If you need a data professional who combines technical precision with practical problem-solving, let’s connect. I’m ready to tackle your Excel challenges, automate repetitive tasks, or analyze complex datasets—efficiently and on time.

9,200+ hours. 100% JSS. Six Sigma Yellow Belt Certified. I am a Senior Data Quality & Governance Specialist with a decade of experience in high-stakes, audit-focused environments. My track record includes 7,300+ hours dedicated to a single Enterprise client (Veeva Systems), where I ensured the integrity of complex Life Sciences data across 18+ global markets. I don't just "enter data"—I build frameworks to ensure it is accurate, consistent, and compliant. Where I deliver immediate value: * Data Governance & Stewardship: Expert-level record matching, entity resolution, and duplicate detection within rule-based frameworks (Veeva OpenData standards). * Audit-Ready Quality Control: I’ve reviewed 10M+ data points with a documented 7-8% error detection rate. I provide full QC logs and traceability. * Data Integrity & Cleaning: Specialized in cleaning and harmonizing complex CRM databases (Veeva, custom MDM systems). * Investigative Research: Strong ability to resolve data conflicts using structured business rules and open-web validation. Technical Toolbox & Methodologies * Data and Quality: Excel Advanced, Power Query, Google Sheets, Power BI, Power Pivot * Veeva and Life Sciences: Veeva Network NTW, Veeva Vault exposure, OpenData standards * Project and Process: Six Sigma Yellow Belt, Scrum Agile, Jira, Monday, Trello, Slack * Documentation and Visualization: SharePoint, Visio, Draw io, Confluence, Google Workspace * Compliance: GDPR aligned data handling, Audit trail creation, Rule based validation My Background: * Long-term Enterprise Experience: 4 years as a Quality Control Specialist at Veeva Systems. * Process Driven: Six Sigma Yellow Belt mindset applied to data workflows. I am an EU-based, GDPR-conscious professional. If you are tired of freelancers who require constant oversight, let’s talk. I bring the precision of a Senior Data Steward to your project from day one.