Summary
Overview
Work History
Education
Skills
Interests
Timeline
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Yissel Diaz Ruiz

New York,NY

Summary

Data Analytics graduate student at Columbia University with strengths in statistical analysis, problem solving, and translating data into actionable insights. Passionate about music, technology, and data-driven product strategy.

Overview

7
7
years of professional experience

Work History

Accountant

Columbia University, SFS Accounting & Business Management
New York, NY
09.2021 - Current

• Analyze financial and operational datasets to identify discrepancies, trends, and efficiency opportunities across departments.
• Partner with cross-functional stakeholders to ensure data accuracy, compliance, and actionable reporting.
• Led analytics-driven process improvements, reducing month-end close timelines by 65%.
• Built and maintained automated trackers and reports to support forecasting and project monitoring.
• Managed and reconciled high-volume transactional data of several accounts, improving data quality and reducing errors by 15%.

Administrative Assistant

Pinnacle City Living
New York, NY
05.2019 - 07.2019
  • Collected, cleaned, and organized property and lease datasets, ensuring accurate tracking of renewals, vacancies, and unit attributes.
  • Supported data-driven decision making by standardizing records and improving data accessibility for operational reporting.

Education

Master of Science - Applied Analytics

Columbia University
New York (City), NY
05-2026

Certificate - Product Management

BrainStation
New York, NY
04-2024

Bachelor of Science - BBA in Statistics And Quantitative Modeling

Baruch College
New York (City), NY
05-2021

Skills

    Programming & Analytics: R, Python (pandas, numpy), SQL
    Statistical Methods: Linear & logistic regression, hypothesis testing, exploratory data analysis
    Data Visualization: Tableau, Excel (pivot tables, macros)
    Other: Accounts Payable and receivable, Financial Reporting, Process automation, data validation, stakeholder communication

Interests

  • Avid Reader
  • Music & podcasts
  • Fitness & wellness, running
  • Fluent Spanish and Beginner Portuguese

Timeline

Accountant

Columbia University, SFS Accounting & Business Management
09.2021 - Current

Administrative Assistant

Pinnacle City Living
05.2019 - 07.2019

Master of Science - Applied Analytics

Columbia University

Certificate - Product Management

BrainStation

Bachelor of Science - BBA in Statistics And Quantitative Modeling

Baruch College