Hire the Best Data Visualization Specialists in California

I'm a GIS analyst and cartographer with 8+ years of experience translating complex environmental, social, and operational data into maps and dashboards that actually get used. I've built interactive Tableau and ArcGIS Online tools for nonprofit disaster response, developed climate visualizations for international NGOs, and mentored students at Columbia University's School of Professional Studies and Climate School. My work has been featured at the Data Visualization Society's Outlier Conference. I work best with organizations where the data matters - environmental nonprofits, sustainability initiatives, climate advocacy groups, public agencies, and mission-driven teams. Whether you need a polished static map for a report, an interactive web map for stakeholders, or a Tableau dashboard that tells a story, I bring both the technical depth and the communication skills to get you there. My approach is equity-focused, collaborative, and delivery-oriented. I'll ask the right questions upfront so the final product fits your audience, not just your dataset.

Your Data, Transformed Into Dashboards That Drive Better Decisions Dashboards built with Looker Studio, Tableau and Power BI turn complex data into clear, actionable visuals—helping teams track performance, identify trends, and make confident decisions every day. What Can Be Delivered SQL-Driven Analytics: Reliable data models paired with clean visuals and intuitive filtering Looker Studio Reports: Google Ads, Analytics, and Sheets unified into a single, clear view Tableau Visualizations: Data storytelling focused on key performance indicators and outcomes Data Preparation: Cleaning, structuring, and organizing datasets for accurate reporting Automated Reporting: Seamless refreshes using blended and connected data sources Tools & Skills BI Tools: Looker Studio | Tableau | Power BI Data Sources: PostgreSQL | MySQL | BigQuery | Google Sheets | Excel Expertise: SQL | Data Visualization | Dashboard Design | Reporting Automation Why It Works Every dashboard is designed with clarity and decision-making as the priority—fast to load, easy to navigate, and built to deliver long-term value. Projects are executed with precision and attention to detail, ensuring each visualization communicates the right insight at the right time. Let’s Build Something That Informs and Inspires Dashboards built with Looker Studio, Tableau and Power BI that transform raw data into meaningful insights—ready to support real business results.

I am an expert Data & Analytics Consultant with nearly 10 years of experience delivering high-impact analytics & AI solutions that have moved the needle for 50+ clients across a multitude of industries ranging from Fortune 100 corporations to Series A startups. Data is the most underused asset most companies have - the answers to their biggest questions are usually already sitting in their systems, just buried, scattered, or stuck in reports nobody reads. My job is to surface those answers and make them useful. • Data Strategy — I help you decide what to capture, how it should be modeled, and how to consolidate scattered sources into a single source of truth. Clean, well-structured inputs are what separate dashboards people ignore from dashboards people run their business on. • Analytics & Visualization — I've delivered 100+ dashboards to 50+ clients, turning complex datasets into clear views that answer real business questions. Power BI, Tableau, Looker, Quick Sight & more. • AI Strategy — I help clients move past standard reporting into predictive and prescriptive analytics: where AI actually creates value, what's realistic versus overhyped, and how to put it to work so your data tells you what's coming, not just what already happened. Across all three, my goal is to be a real partner on your hardest problems, not just hand off a file and leave. Industries: Finance, Marketing, Accounting, Quick-Service Restaurant, Healthcare, Construction, Manufacturing, Life Sciences & Pharmaceutical Expertise: Data Strategy · AI Strategy · Data & Financial Modeling · Business Analysis · Marketing Analytics · Data Science · Dashboard Development · Power BI · Power Apps · Power Automate · M Query · DAX · Tableau · Tableau Prep · Alteryx · Python · AWS

Want to work with a Top-Rated Tableau & Data Analytics Expert? I build modern, visually compelling, and interactive dashboards, helping businesses unlock the power of their data to drive smarter decision-making. With 8+ years of experience in data analytics and data visualization, I focus on delivering clean, insightful, and interactive dashboards that help businesses grow. I’m well-versed across industries—whether it’s marketing data, sales reports, SEO dashboards, predictive modeling, or complex SQL and ETL workflows, I can build the best solution for you. What I do Best: • Business Intelligence & Data Visualization – Tableau, Tableau Prep, Power BI, Looker Studio, Zendesk Explore • Data Analysis – Python, SQL • Machine Learning & AI – Predictive modeling, forecasting, fuzzy matching algorithms, large language models (LLMs), retrieval-augmented generation (RAG) • ETL & Data Pipelines – Optimizing SQL queries, automating workflows • Excel Automation / VBA Macros • Cloud Data Solutions – Azure, AWS, Snowflake, BigQuery How I Work I start by understanding your goals, data sources, and key metrics. From there, I design and develop a tailored solution—whether it’s a dashboard, report, data pipeline, or machine learning model. I work collaboratively, incorporating your feedback and adapting to changes along the way. My focus is always on delivering clear, actionable, and reliable results that support smarter, data-driven decision-making Why Choose Me? • Proven Track Record – Top-rated on Upwork with 900+ hours worked, perfect 5-star feedback, and 100% job success. • Excellent Communication & Transparency – I’m always clear, responsive, and provide frequent updates on project progress. • Data-Driven Approach – I help you make informed decisions with precise, actionable insights. • Fast & Reliable – I respect deadlines and deliver high-quality results on time. I ensure that all key milestones are met without delays. • Industry Expertise – I’ve built dashboards for businesses in marketing, finance, e-commerce, and healthcare, helping them track KPIs, automate reporting, and extract real-time insights. What Clients Say About My Work: ⭐️⭐️⭐️⭐️⭐️"Kofi did a great job on ETL and ML tasks using Amazon Web Services (AWS). We'd be happy to work with him again." ⭐️⭐️⭐️⭐️⭐️"Kofi was great at communicating and meeting deadlines. He quickly adapted to a new data connector and delivered our dashboard efficiently. I appreciated his thoughtfulness and recommendations for improving our dashboard visualizations." ⭐️⭐️⭐️⭐️⭐️"Kofi was great to work with and very knowledgeable about Tableau. I will definitely work with him again if I can." ⭐️⭐️⭐️⭐️⭐️"It was an excellent experience working with Kofi. He consistently produces high-quality visualizations and delivers on time. He is committed, responsive to feedback, and flexible when project requirements change. I look forward to working with him on future projects!" Need Help on Your Next Project? Let’s schedule a call to discuss your project objectives and how I can help you unlock insights, automate reporting, and build visually appealing, actionable dashboards.

I help businesses turn raw data into clear, actionable insights. With 10+ years working in tech, I specialize in building intuitive Tableau dashboards, writing efficient SQL queries, and automating reporting workflows to save time and reduce errors. Whether your data lives in Excel, a complex database, or somewhere in between, I can organize it, visualize it, and make it useful for decision-making. Clients hire me when they need a strategic partner, not just a report builder. Core Skills & Tools 📊 Tableau – dashboards, visualizations, performance optimization 🗄️ SQL – queries, joins, data modeling 📑 Excel – formulas, pivot tables, Power Query, data cleaning 📈 Data visualization & business intelligence (BI tools) 📉 Reporting optimization & KPI tracking 🔍 Data analysis, forecasting, and trend identification Let’s talk about how I can make your data work harder for you.

🚀 As a TOP RATED PLUS freelancer with a 100% Job Success Rate on Upwork, I bring expertise in data visualization using Power BI. I have the ability to transform raw data into relevant information, providing insights to help clients visualize their data. 👨‍💻 With over 10 years of experience, I am a certified Power BI expert and master in DAX language. I also possess a deep understanding of SQL and have a track record of delivering high-quality solutions for my clients. 📈 Whether you need help with data modeling, dashboard creation, or performance optimization, I offer a range of services to suit your needs. I am committed to providing stunning and flexible business intelligence solutions that help you make informed decisions and stay ahead of the competition. 💻 Some of the services I offer include: - Full-stack Power BI solution development - Implementing Power BI embedded solutions and row-level security - Power BI solutions audit and data model enrichment - Power BI data model performance optimization - Custom visuals development - Basic and advanced DAX and Power Query remote and on-site training 📊 Let's take your data to the next level together! Contact me to get started.