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About

Sethu S ↓  Download Resume
✉sethus4791@gmail.com inlinkedin.com/in/sethus4791 ⌥github.com/itsmesethus ◈kaggle.com/sethu123123 ◉Coursera Profile ◎Credly Profile

📍 Villupuram, Tamil Nadu-605103
☏ +91-8122815260

Sethu S

Data Scientist  ·  Statistician  ·  AI/ML Engineer

3+
Years Exp.
6+
Projects
30+
Certifications

I am a Statistics graduate and Data Scientist with 3 years of professional experience delivering statistically robust and scalable analytics solutions in large-scale data environments. Currently working as an AI/ML Engineer at Nielsen, I contribute to the development and validation of high-precision audience measurement and weighting methodologies that support national television analytics and decision systems. My work involves designing and optimizing data pipelines, implementing advanced statistical techniques, and working with large datasets using Python, PySpark, and SQL. I play a key role in maintaining data integrity and methodological accuracy while supporting industry regulatory audits, including Media Rating Council (MRC) reviews conducted by Ernst & Young (EY). This experience has strengthened my ability to build reliable, transparent, and production-ready analytical systems. With a strong foundation in statistics and machine learning, I specialize in translating complex analytical concepts into scalable data solutions — passionate about leveraging data science to extract meaningful insights and enable organizations to make informed, data-driven decisions at scale.

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Experience

Current Role
Nielsen — AI/ML Engineer
Bangalore, IndiaJuly 2024 – Present
Key Responsibilities
  • Spearheaded the 2025-2026 US TV Annual Weighting Control Review by updating and validating complex PySpark & SQL code and revising decision logic for next-year weighting stages, providing critical implementation guidelines for 6+ downstream teams to ensure methodological compliance for the National TV ratings.
  • Led end-to-end technical walkthroughs for Media Rating Council (MRC) audits conducted by Ernst & Young (EY); provided deep-dive code explanations and methodological transitions for weighting pipelines, resulting in zero follow-ups and findings.
  • Executed the "Media Landscape Project (Presence of Attributes)" by transitioning theoretical research into functional code prototypes using Python for the 2 weighting pipelines (NPM & Big Data + Panel) and collaborated across teams to deliver methodology enhancements results to the MRC.
  • Optimized 4 critical weighting engines (NPM, Big Data + Panel, OOH & OOHx), maintaining high-precision audience estimation for National TV ratings and earning a 2025 Silver Award for technical excellence during MRC audits.
  • Enhanced 3-step quality framework (Installed, Intab, and HUT) to automate data exclusion thresholds; collaborated with engineering teams to integrate these validation gates into the production Intab select.
  • Validated the Time Period Rating Engine through Full Sample UAT, detecting and resolving critical Universal Estimates (UE) discrepancies; supported Custom Vizio-Roku Weighting process and executed high-impact ad-hoc technical audits to satisfy complex client requirements.
Tools & Skills
Evoscien Pvt Ltd — Statistician
Bangalore, IndiaMay 2023 – June 2024
Key Responsibilities
  • Managed and preprocessed large datasets obtained from the Entomology research team, ensuring data integrity and suitability for further statistical analysis.
  • Designed and implemented statistical models, algorithms, and techniques, extracting insights that led to a 15% improvement in decision-making processes.
  • Conducted appropriate statistical tests (t-tests, ANOVA, chi-square tests, and non-parametric tests) to analyze data and identified meaningful patterns, trends, and relationships with a 95% confidence interval.
  • Collaborated with Entomology and Engineering with data-driven approaches, resulting in improved operational efficiency by 15%.
  • Created 20+ detailed reports and interactive data visualizations, effectively communicating analytical findings to both technical and non-technical audiences.
  • Continuously stayed updated with new developments and trends in statistical analysis and software packages.
Tools & Skills
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Education

Postgraduate
M.Sc Statistics
Bharathiar University
Coimbatore, Tamil Nadu2021 – 2023
CGPA 8.61 / 10
Relevant Coursework
Undergraduate
B.Sc Statistics
Arignar Anna Govt Arts College
Villupuram, Tamil Nadu2018 – 2021
CGPA 9.39 / 10
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Skills

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Projects

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Certifications

Certifications earned across data science, ML, statistics, and analytics domains.

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Contact

Feel free to reach out for collaborations, opportunities, or just to connect. I'm always open to discussing data science, AI/ML engineering, and analytics.

Get In Touch

📍 Villupuram, Tamil Nadu-605103
☏ +91-8122815260

Resume

Download my resume to learn more about my experience, skills, and achievements in data science and AI/ML engineering.

↓  Download Resume — Sethu S