As a dedicated Data Analyst with a solid foundation in Industrial Engineering and a passion for leveraging data to drive strategic decision-making, I thrive on transforming complex data sets into actionable insights. Currently pursuing my MSc in Data Science at Sabancı University, I am specializing in the application of machine learning and graph neural networks to solve real-world problems, such as my thesis on "Solving Exam Scheduling Problem Using Graph Neural Network"With hands-on experience at TEMSA, I have successfully led the design and development of multiple dashboards that have enhanced decision-making processes across various business functions, including Finance, Strategy Development, and After Sales. My work involved collaborating with cross-functional teams to ensure data solutions were aligned with business goals, implementing advanced data visualization techniques, and developing ETL pipelines to maintain data integrity.I am driven by curiosity and a continuous desire to learn, which is reflected in my journey from an undergraduate degree in Industrial Engineering to a minor in Business Analytics, complemented by an exchange program at the National University of Singapore. My technical skills include proficiency in Power BI, SQL, Python, PyTorch, Azure Data Factory, and Microsoft Fabrics, which I continually refine through practical projects and ongoing academic pursuits.
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Data Analytics SpecialistTemsaİstanbul, Turkey -
Data AnalystTemsa Mar 2022 - PresentIstanbul, Turkey• Selected from 10,000 candidates for the Sabancı Holding Management Trainee (MT) program (SEED), completed rotations in the Spare Part Team and SabanciDx Advanced Data Analytics Team.• Successfully completed leadership and development programs, enhancing critical thinking, storytelling, and data analytics skills, leading to enhanced problem-solving for complex business challenges.• Collaborated with 3 departments (Finance, After Sales, Strategy Development) to analyze needs and develop customized data solutions, resulting in more informed decision-making and better alignment with departmental goals.• Designed and developed 6 dashboards (Profitability, Expenses, Corporate KPIs, After Sales KPIs, Spare Part Sales, and Spare Part Inventory), significantly enhancing decision-making processes and operational efficiency.• Developed and monitored data quality rules for master data (customer, materials, supplier), effectively identifying and highlighting data errors and enhancing the accuracy of reports• Created and maintained ETL pipelines using Microsoft Fabrics, Azure Data Factory and SQL. -
Teaching AssistantSabanci University Feb 2023 - Jun 2024Istanbul, TürkiyeCourse Name: CS 201 (Programming Fundamentals)• Conducted weekly office hours, assisting over 300 students with understanding programming fundamentals.• Graded assignments, homework, and exams, ensuring fair and consistent evaluation. -
Learning AssistantSabanci University Feb 2021 - Jun 2021Istanbul, TurkeyCourse Name: IE 305 (Simulation)• Conducted weekly online recitations for a class of 50 students, solving example problems and enhancing learning processes.• Conducted office hours to answer students' questions regarding the course material. -
Category Management InternGittigidiyor Jul 2020 - Aug 2020Istanbul, Turkey• Monitored and analyzed daily price competition for deal products, providing valuable insights that informed strategic adjustments and enhanced competitive positioning.• Supported category management with detailed market research and effective pricing strategies, contributing to more informed decision-making and improved pricing accuracy. -
Strategic Planning InternEvyap Jun 2019 - Jul 2019Tuzla, Istanbul, Turkey• Explored and documented production processes across Soap, Liquid Soap, and Shampoo production areas, identifying key areas for potential efficiency gains.• Analyzed tolerance differences in liquid shampoo and baby diaper production to improve quality control.
Sefa Yildiz Education Details
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3.75/4.00 -
3.75/4.00 -
Exchange Program -
3.85/4.00
Frequently Asked Questions about Sefa Yildiz
What company does Sefa Yildiz work for?
Sefa Yildiz works for Temsa
What is Sefa Yildiz's role at the current company?
Sefa Yildiz's current role is Data Analytics Specialist.
What schools did Sefa Yildiz attend?
Sefa Yildiz attended Sabanci University, Sabanci University, National University Of Singapore, Sabanci University.
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