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Lize Willemse

@lizewillemse

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I translate business needs into data, process, and technology solutions.

South Africa

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What I'm looking for

I'm looking to translate complex business needs into practical processes, data solutions, and technology delivery, working across cross-functional teams on analytics, systems improvement, and digital transformation.

I've delivered business analysis, data, and technology solutions for OpenBox Software, Wavery Consulting, NielsenIQ, and RT7 Digital across UK, US, European, and South African markets.

At RT7 Digital, I led the BI function, developed and deployed a data warehouse with ETL enhancements, delivered recurring client reporting, and built an Amazon-seller tracking dashboard for market and competitor analysis. At NielsenIQ, I investigated complex client data queries, supported reporting feasibility, and maintained reporting quality standards.

I'm experienced in turning stakeholder needs into process maps, functional requirements, user stories, reporting specifications, and practical delivery outcomes. My work includes API and integration testing, Power BI reporting, data validation, dashboard development, process optimisation, and digital transformation.

With an Industrial Engineering foundation and more than 10 years of experience, I bring together analytics, systems thinking, stakeholder management, and continuous improvement to help teams work smarter.

Experience

Work history, roles, and key accomplishments

Current

Senior Business Analyst

Current

OpenBox Software

Jul 2025 - Present (1 year 1 month)

Manage client and stakeholder relationships, translating business needs into clear requirements and actionable delivery outcomes. Design and document business processes to support workflow improvement and system implementation.

Business Analysis Stakeholder Management Requirements Definition Process Design User Stories API Testing System Integration

Systems Business Analyst

Wavery Consulting

Sep 2024 - May 2025 (8 months)

Mapped business processes and translated stakeholder needs into structured system and functional requirements. Developed user stories and supported testing to validate solutions against business requirements.

Business Process Mapping Requirements Analysis User Stories Testing Integration Mapping Stakeholder Engagement

Manager, Data Science

NielsenIQ

Mar 2022 - Sep 2024 (2 years 6 months)

Led data science initiatives at a global market intelligence organisation, investigating complex client queries and assessing feasibility of custom reporting adaptations. Managed annual reviews of industry coverage and ensured accurate representation of the South African retail landscape.

Data Analysis Reporting Feasibility Assessment Retail Analytics Data Quality Stakeholder Management

Power BI Developer

Aculocity

Jun 2021 - Feb 2022 (8 months)

Developed and maintained Power BI reporting solutions to support business reporting and decision-making. Contributed to database improvements and migration-related activities, and provided ad-hoc reporting and analytical support to business stakeholders.

Power BI Data Analysis Database Management Reporting SQL

Head of BI / E-commerce Data Strategist

RT7Digital

Sep 2019 - May 2021 (1 year 8 months)

Strategically managed the BI function and provided analytical services to internal business units. Developed and deployed a data warehouse, delivered client reporting, and managed executive stakeholder engagement.