Onyinye Stephanie Ozor
Wolverhampton,United Kingdom
Summary
I'm a technically skilled Data Analyst with expertise in SQL, Power BI, and automation of performance reporting. I translate complex datasets into actionable intelligence that helps teams monitor KPIs, manage demand, and meet reporting standards. I thrive on solving analytical challenges that make a tangible difference to service planning and care quality
Overview
4
4
years of professional experience
7
7
years of post-secondary education
1
1
Certification
Work history
Data Healthcare Worker
University Hospital Birmingham (NHS)
Birmingham, United Kingdom
04.2024 - 05.2025
- Collaborated on cystoscopy procedures and documentation, improving data accuracy and consistency.
- Maintained patient data in hospital systems, ensuring compliance with NHS data governance policies.
- Trained 5+ team members in data documentation and compliance, improving team efficiency by 25%.
- Participated in weekly team meetings to discuss progress and targets.
- Collaborated with team members to achieve daily targets.
Data Analyst
University Hospital Birmingham (NHS)
Birmingham, United Kingdom
01.2025 - 03.2025
- Developed and maintained dynamic Power BI dashboards to monitor Referral to Treatment (RTT) pathways, enabling stakeholders to spot care pathway delays earlier and take corrective action within the same reporting cycle.
- Extracted, cleaned, and validated large datasets using SQL, directly supporting accurate reporting and compliance with NHS England's monthly submissions requirement, preventing data rejections and reporting penalties.
- Developed performance reports and benchmarking, which cut patient waiting times for appointments by more than 30%.
- Automated reporting processes, reducing manual data processing time by 50% through SQL scripting and workflow optimization.
- Presented reports to stakeholders, supporting evidence based decisions on elective recovery strategies and theatre utilisation, which informed realignment of clinical target .
- Enhanced data quality and compliance reporting by implementing automated validation checks, resulting in a 95%+ accuracy rate for SUS submissions and, consequently, safeguarding payment by results revenue streams.
Data Analyst
Tiege Consult Ltd
Enfield, United Kingdom
01.2023 - 04.2024
- Leveraged SQL, Excel (Pivot Tables, VLOOKUP), and Power BI to uncover key trends that directly influenced quarterly revenue strategy, resulting in a 12% uplift in campaign ROI for the marketing team.
- Automated business intelligence reporting, which cut down weekly reporting time from 10 hours to under 5 hours, allowing my team to reallocate time to proactive analysis and forecasting.
- Developed DAX-powered Power BI dashboards, which enabled real-time monitoring of healthcare operational cost and efficiency KPIs and helped reduce inventory holding costs by 18% for the client.
- Cleaned and validated large datasets using Python (Pandas), leading to a 30% drop in reporting discrepancies and reducing back-and-forth between data and operations teams during monthly audits.
- Presented analytical findings that led stakeholders to reallocate 20% time to high-impact initiatives.
Data Analyst Intern
OES Energy Limited
Lagos, Nigeria
01.2021 - 12.2022
- Designed Power BI dashboards to visualize operational performance, empowering field engineers and executives to act on real-time data and shortening response time to underperforming assets by 25%.
- Queried and analysed large oil & gas datasets using SQL & Excel, cutting manual reporting time by 40 hours monthly and enabling earlier identification of production anomalies.
Education
Master of Science - Big Data Analytics
University of Derby
Derby 09.2022 - 10.2023
Bachelor of Science - Geology
Alex Ekwueme Federal University Ndufu-Alike Ikwo (AE-FUNAI)
Ebonyi State, Nigeria. 11.2016 - 12.2021
GCSEs - Maths & English
West African Examination Council
Niger state, Nigeria. 10.2013 - 12.2014
Skills
- Power BI, SQL, Python, R, Excel SSRS
- Data Analysis & Visualization
- Database Management & ETL
- Data Cleansing & Time management
- Statistical Analysis & Machine Learning
- Process Optimization & Automation
- Data Governance , GDPR & Compliance
- NHS Data Standards
- Data Validation
- Documentation Accuracy
- Data Storytelling
- Presentation
- Collaboration
Certification
- Data Analysis, Tritek Consulting, 2024
- SSRS-SQL Server: Reporting Services, Unknown, 2024
- MySQL for Data Analysis, Unknown, 2023
- Power BI Data Dashboards, Unknown, 2023
- Level 4 CPD - Introduction to UK Financial Regulation & Professional Integrity, In Progress, In Progress
Custom
Predictive Model for Mental Health Screening, Developed machine learning model using Python & Support Vector Machine (SVM) to assess patients' mental health based on chatbot interactions. Applied NLP techniques for text analysis, enhancing mental health screening accuracy. Customer Purchase Behaviour Analysis, Created an interactive Power BI dashboard to analyse customer purchasing patterns, identifying top-selling products, revenue trends, and customer demographics. Provided data-driven recommendations to optimize marketing strategies. Crime Pattern Analysis (Derbyshire), Analysed Derbyshire crime data using R, identifying common offenses and peak crime periods. Provided actionable insights that influenced law enforcement policy decisions. Classification & Predictive Analytics, Built customer behaviour classification models using Python & Random Forest algorithms, improving forecasting accuracy and supporting strategic business planning.
Accomplishments
Placed in the top 25% of candidates in a standardized Attention to Detail assessment, demonstrating high accuracy and precision under time constraints.
Timeline
Data Analyst
University Hospital Birmingham (NHS)
01.2025 - 03.2025
Data Healthcare Worker
University Hospital Birmingham (NHS)
04.2024 - 05.2025
Data Analyst
Tiege Consult Ltd
01.2023 - 04.2024
Master of Science - Big Data Analytics
University of Derby
09.2022 - 10.2023
Data Analyst Intern
OES Energy Limited
01.2021 - 12.2022
Bachelor of Science - Geology
Alex Ekwueme Federal University Ndufu-Alike Ikwo (AE-FUNAI)
11.2016 - 12.2021
GCSEs - Maths & English
West African Examination Council
10.2013 - 12.2014
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