Winnie Madikizella

I am a Data & Business Intelligence Analyst with over three years of experience helping businesses and mission-driven organizations escape the guesswork of bad data and turn it into actionable insights. My career has been focused on transforming complex data into a clear story, which has allowed me to drive tangible growth and make confident decisions across a variety of sectors, from social enterprises to e-commerce startups.

My Career and Expertise:

I began my journey as a Sales & Market Analyst, where I quickly learned to translate data into revenue, generating over $1.5M by analyzing customer acquisition and retention. As a Program Data Lead, I focused on using data for social impact, building dashboards that tracked over 5,000 beneficiaries to influence policy and secure funding. In my freelance work, I specialized in engineering automated BI pipelines that cut reporting time by 80%, freeing up teams to focus on strategy instead of manual work. My experience with tools such as Excel, Power BI, SQL, Python, Tableau, and AWS has enabled me to build scalable solutions that address real, business-critical problems.

Key Achievements

A passion for delivering measurable results drives my work. Here are some of my key achievements:

• Accelerated Executive Decision-Making: I built real-time Power BI dashboards that accelerated executive decision-making by 40% and boosted marketing campaign optimization speed by the same amount.

• Drove Revenue & Growth: I helped generate over $1.5M in new revenue and drove a 12% sales rebound in one quarter through data-driven experiments.

• Automated & Streamlined Reporting: I engineered fully automated BI pipelines that cut the reporting workload by 80% and automated 75% of donor reports, saving over 15 hours per month.

• Improved Data Quality & Accuracy: I improved data accuracy to 99% through validation models and standardized over 10K+ pricing records, raising data accuracy to 98%.

Interests:

Beyond my professional work, I am deeply interested in data literacy and community empowerment. My goal is to build an open-access platform to help people from all backgrounds understand and use data to improve their lives and businesses. I am always exploring how to leverage new technologies like large language models to solve complex social problems, and I am committed to sharing my knowledge by contributing to open-source projects.