Mariño Klint John

Data Analyst with experience in ETL, data validation, and dashboard development, specializing in transforming complex datasets into actionable insights. Skilled in Excel, Power Query, Power BI, and SQL, with a focus on improving data accuracy and efficiency. Continuously developing advanced analytics skills to deliver greater business impact.

Data Analyst at Staff Outsourcing Solutions (2025-01 – Present)

• Executed end-to-end ETL processes, transforming raw vendor catalogs into clean, structured datasets ready for system integration and reporting
• Developed automated data transformation workflows using Excel and Power Query, reducing manual processing and improving data consistency across large datasets
• Standardized product attributes (MAKE, MODEL, YEAR, OEM, NI#) to ensure uniform formatting and high data quality
• Applied validation techniques using COUNTIFS, lookup functions, and cross-referencing with ARI and internal datasets to maintain high data accuracy
• Designed rule-based classification systems to tag records such as Match or Discard, improving data reliability for downstream processes
• Identified and resolved naming inconsistencies through data analysis and research, increasing matching accuracy across datasets
• Delivered validated and production-ready datasets to support business operations, reporting, and system ingestion

Data Entry Specialist at Staff Outsourcing Solutions (2024-09 – 2025-01)

• Managed and maintained large-scale product listings across Amazon, eBay, Walmart, and internal platforms, ensuring data accuracy and consistency
• Processed bulk product data using Excel, including SKU matching, deduplication, and data structuring for efficient catalog management
• Conducted data research to complete missing product attributes and improve listing completeness and quality
• Performed data validation on pricing, titles, and specifications to maintain consistency across platforms
• Contributed to the creation of structured, SEO-friendly product content to enhance visibility and performance

BSBA in Marketing – Mindanao State University at Naawan (2019 – 2024)

International Baccalaureate (IB) Passer – Al‑Batinah International School (2013 – 2019)