Overview
Senior Data Analyst Jobs in City of Johannesburg, Gauteng, South Africa at Massmart
Title: Senior Data Analyst
Company: Massmart
Location: City of Johannesburg, Gauteng, South Africa
“We encourage people with disabilities to apply.”
Summary:
The Senior Data Analyst is responsible for designing, developing, and maintaining accurate and relevant dashboards and reports that support data-driven decision-making across Massmart. The role is also required to deliver mid-complexity analytics solutions, perform trend analysis, and ensure data quality through validation and alignment with enterprise standards.
FUNCTIONS / RESPONSIBILITIES:
Dashboard and Report Creation
- Design, develop, and maintain dashboards and reports using governed data sources, ensuring consistency with enterprise standards and definitions.
- Apply best practices in visualization design, including interactivity, drill-down functionality, and user-friendly layouts.
- Maintain a report library with proper version control, updating dashboards as business priorities change.
- Document report logic, data sources, and calculations for transparency and reusability.
- Continuously refine reporting solutions based on user feedback and business needs.
Data Analysis and Interpretation
- Conduct trend, variance, and correlation analysis to provide insight into changes in key performance metrics.
- Translate raw data into clear narratives and visuals that support business decision-making.
- Support root-cause analysis of performance issues and surface tactical recommendations to address gaps.
- Collaborate with senior analysts to build multi-source datasets and more advanced analytics outputs.
Data Management and Validation
- Perform validation and quality checks on all reports and dashboards before release, ensuring accuracy and business confidence.
- Align with data dictionaries, governance standards, and definitions, flagging inconsistencies or anomalies to governance or data engineering teams.
- Prepare and clean data sets for new reporting requirements, ensuring repeatability and consistency.
- Follow established update cycles and version control processes for reporting products.
Stakeholder Management and Support
- Act as a first-line support contact for end users, resolving dashboard access issues and reporting queries.
- Collaborate with business teams to scope requirements for new dashboards or enhancements.
- Provide timely reporting and insights to support ad hoc business initiatives, campaigns, or projects.
- Contribute to training sessions or demos to improve stakeholder understanding of BI tools and dashboards.
Requirements:
Minimum Academic, Professional Qualifications and Experience required for this position
Qualifications:
- Bachelor’s degree / Advanced Diploma in Business Analytics/ Information Systems/ Computer Science/ Statistics related qualification.
- Honours degree / Postgraduate Diploma in Business Analytics/ Information Systems/ Computer Science/ Statistics related qualification advantageous.
- Certification in BI tools (Power BI, Tableau) or Data Visualization Governance advantageous.
Experience:
- 5+ years of progressive experience in analytics/BI/reporting roles working with large, complex datasets and integrating multiple data sources within retail, multi-format, or omni-channel organizations.
- Proven ability to design and maintain dashboards and reports using Power BI, Tableau, or equivalent.
- Proficiency in Excel (advanced functions, pivot tables)
- Proficient in SQL/big query
Competencies and Skills
- Ability to identify trends, anomalies, and actionable insights from data.
- Ensures high data quality and accuracy in reporting outputs.
- Presents findings in a clear, compelling, and business-relevant manner.
- Skilled in BI tools, SQL, and data manipulation.
- Works effectively with senior analysts, stakeholders, and governance teams.
- Responds quickly to reporting issues and escalates risks when necessary.
- Thrives in a dynamic environment with shifting priorities.
- Seeks opportunities to streamline reporting processes and enhance user experience.
Technical Skills
- BI & Visualization Tools e.g., Power BI (DAX), Tableau, or equivalent (strong working knowledge).
- Intermediate SQL for joining, filtering, and preparing datasets.
- Familiarity with data dictionaries, governance frameworks, and validation processes.
- Ability to schedule and refresh automated reports to reduce manual work.
- MS Teams, Confluence, Jira for requirement gathering and issue tracking.
- Advanced knowledge of data manipulation and ad hoc analysis.
“Employment Equity Policy Requirements may be applicable”