Data Processing & Analysis Specialist

KALEJAIYE OLAYINKA OLUJIMI

Data Processing & Data Analysis Specialist

Lagos, Nigeria ********@*******.*** +234 802-***-**** LinkedIn: [Profile] Portfolio: [Link]

Professional Profile

Seasoned Data Processing and Data Analysis Specialist with 11+ years of experience in high-volume data entry, validation, and database management. Expert in Excel, Google Sheets, SQL, dashboard reporting, data cleaning, and exploratory data analysis (EDA). Delivered 20-30% efficiency gains, 90-95% accuracy improvements, and actionable insights in remote, deadline-driven environments. Excelled in confidentiality, process optimization, and cross-functional collaboration for data-driven decisions.

Key Skills

Data Entry & Validation

Data Processing & Migration

Database Management (Oracle, Access)

Data Cleaning & Reconciliation

Exploratory Data Analysis (EDA)

Dashboard Design & KPI Reporting

Excel (Advanced: PivotTables, VLOOKUP, Power Query, Macros)

Google Sheets & SQL Querying

Process Automation & Optimization

Remote Collaboration (Zoom, Slack)

Professional Experience

Senior Data Processing Officer / Team Lead

Lagos State Residency Registration Agency, Lagos, Nigeria

2020 – Present

Streamlined bulk data entry and validation using automated Excel and Access workflows, reducing processing time by 20% and boosting accuracy to 90% across 10,000+ records.

Developed biometric matching scripts, slashing manual verification time by 25% and accelerating resident ID applications while minimizing errors.

Designed unique ID indexing system, enhancing retrieval speed and achieving 95% verification accuracy for improved compliance and efficiency.

Generated compliance dashboards and reports, enabling timely decisions and regulatory adherence for stakeholders.

Resolved data discrepancies via cross-team coordination, cutting delays and elevating resident satisfaction.

Enforced data confidentiality and documented improvements, ensuring seamless transitions and 15% error reduction.

Data Analyst Intern

Nebiant Analytics (Remote)

Jun 2025 – Sep 2025

Analyzed supermarket data with PivotTables and VLOOKUP, identifying trends that optimized inventory and drove 12% sales increase.

Performed HR attrition analysis on cleaned datasets, pinpointing drivers to cut recruitment costs and enhance retention.

Automated data cleaning, reducing reporting errors by 30% and speeding project turnaround for stakeholders.

Created interactive dashboards, saving 15 hours monthly in manual reporting and accelerating decisions.

Data Processing Officer / Deputy Team Lead

Lagos State Residency Registration Agency, Oyo, Nigeria

Jan 2014 – 2020

Automated data entry with Excel macros and templates, increasing team productivity by 25% and expediting ID issuance.

Implemented data cleansing protocols, improving accuracy by 18% and streamlining resident records.

Optimized workflows and reporting, saving management 10 hours weekly and ensuring deadline compliance.

Processed biometric data via AssureID, reducing rework and boosting satisfaction/compliance.

Key Projects

AMDARI: Crime & Drug Abuse Analytics Dashboard

Developed interactive Excel dashboard for 10,000 records using Power Query and geospatial analysis, improving accuracy by 30% and revealing 25% correlation in repeat offenses with 10 visuals for stakeholders.

Sales Data Visualization Dashboard

Consolidated 50,000 sales records into KPI dashboard with PivotTables and slicers, highlighting 12% branch improvements and saving 20 hours monthly in reporting.

Order Fulfillment Dashboard

Automated tracking for 10,000 deliveries across 5 hubs, reducing backlog by 18% and delays by 25% via real-time metrics.

Education

Bachelor of Science in Biochemistry

University of Ado-Ekiti, Ekiti, Nigeria

Certifications & Training

Oracle Database 11g Administrator Certified Associate (OCA)

CompTIA Security (New Horizon Nigeria)

CompTIA Networking

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