BIDEMI SAKA TUNJI

Data Analyst | Data Visualization | SQL Expert

LinkedIn

About

Highly skilled and results-oriented Data Analyst with expertise in SQL, Power BI, and data visualization. Proven ability to transform complex datasets into actionable insights, drive data-driven decision-making, and enhance reporting efficiency. Committed to continuous learning and effective collaboration to achieve impactful business outcomes.

Work Experience

Data Analysis Intern

Cognifyz Technologies

Dec 2025 - Present

Internship focused on advanced data analysis and visualization techniques to support strategic initiatives.

  • Contributed to a Gender-Based Investment Project by leveraging comprehensive data analysis to identify key trends and uncover actionable insights, informing strategic investment decisions.
  • Developed and presented impactful data visualizations using Power BI, significantly enhancing stakeholder understanding of complex data sets and facilitating informed decision-making.
  • Designed, developed, and maintained robust dashboards to enable effective project monitoring, progress tracking, and streamlined reporting processes.

Data Analysis Intern

Amdor Analytics

Dec 2025 - Present

Internship centered on business intelligence and data management, focusing on improving data quality and deriving actionable insights.

  • Created an interactive Power BI dashboard to meticulously analyze consumer complaints, effectively highlighting critical service issues and supporting targeted resolution strategies.
  • Identified significant patterns and emerging trends within customer feedback data, providing actionable insights that empowered decision-makers to enhance service delivery.
  • Collaborated on a team project to enhance overall data quality, directly contributing to a 20% improvement in data accuracy and reliability.

Data Analysis Tutor

Cipher Academy

Dec 2025 - Present

Provided comprehensive instruction and mentorship in data analysis tools and concepts to aspiring professionals.

  • Taught foundational and advanced Excel and Power BI skills to aspiring data analysts through structured, hands-on virtual classes, fostering practical application.
  • Designed and delivered comprehensive beginner to intermediate-level curricula, with a strong focus on essential data cleaning, visualization, and dashboard creation techniques.
  • Provided personalized one-on-one mentoring and constructive feedback, significantly supporting student development and enhancing their career readiness in data analytics.

Education

Aircraft Engineering Technology

Nigerian Airforce Institute of Technology

N/A

Certificates

Advanced SQL for Data Analysis

Udemy

Power BI and Excel For Data Analytics

Udemy

Projects

Data Analysis Challenges (Zoom Chart)

Engaged in data analysis challenges to apply analytical skills in diverse sectors.

Languages

English (Expert) , Yoruba (Native)

Skills

SQL

  • Complex Queries
  • Data Manipulation

Data Analysis

  • SQL
  • Power BI
  • Data Visualization
  • Excel
  • Business Intelligence
  • Report Generation
  • Data Management
  • Analytical Thinking
  • Data Quality

Power BI

  • Dashboard Creation
  • Data Visualization
  • Business Intelligence

Data Visualization

  • Power BI
  • Dashboard Design
  • Storytelling

Microsoft Excel

  • Data Cleaning
  • Data Analysis
  • Reporting

Business Intelligence

  • Consumer Insights
  • Trend Identification
  • Decision Support

Report Generation

  • Dashboarding
  • Performance Monitoring

Data Management

  • Data Quality
  • Data Accuracy

Communication

  • Presentations
  • Stakeholder Engagement
  • Feedback Integration

Team Collaboration

  • Cross-functional Teams
  • Project Contribution

Curriculum Development

  • Training
  • Mentoring

Interests

Data-Driven Storytelling

  • Decision-Making
  • Strategy
  • Impactful Communication

Continuous Learning

  • Self-Study
  • Workshops
  • Courses
  • Skill Enhancement