Stanley Mutisya
Verified Expert in Support and Operations
Support & Operations Expert
Nairobi, Nairobi County, Kenya
Toptal member since February 9, 2026
Stanley is an executive virtual assistant and operations specialist with over five years of experience supporting international clients across administrative operations, healthcare support, freight coordination, and data-driven environments. He specializes in managing executive calendars, monitoring operational and dispatch boards, preparing end-of-day summaries, and maintaining high-accuracy records in accordance with strict confidentiality standards.
Expertise
- Advanced Excel
- Asana
- ClickUp
- Data Analysis
- Healthcare
- HubSpot CRM
- Microsoft Power BI
- SQL
Work Experience
Data Analyst | Operations Support
Impact Outsourcing Ltd
- Cleaned, organized, and maintained datasets of more than 266 records, improving data accuracy and usability.
- Built and maintained tracking systems in Google Sheets, Microsoft Excel, and Airtable, improving reporting visibility for stakeholders.
- Identified and corrected data inconsistencies, reducing reporting errors by 50%.
- Generated weekly and monthly reports to support operational and performance analysis.
- Created standardized data entry and documentation processes, improving team efficiency and consistency.
Administrative Assistant and Project Coordinator
J.MAR Constructions Pty Ltd
- Managed executive calendars, inboxes, and meeting logistics, supporting various stakeholders with 98% – 100% scheduling accuracy.
- Coordinated cross-team communication, ensuring deadlines and action items were consistently met.
- Maintained confidential records and sensitive data with zero compliance or data-handling incidents.
Data Analyst Intern
Ajira Digital Program
- Completed hands-on training in virtual assistance, data management, and digital tools, applying skills to real-world tasks and simulations.
- Executed administrative support tasks, including email handling, scheduling, and document management, with high accuracy.
- Managed and organized datasets using Microsoft Excel and Google Sheets, improving data clarity and usability.
- Followed structured workflows and standard operating procedures (SOPs) to deliver tasks within defined timelines.
- Demonstrated professionalism in remote work environments, meeting quality and turnaround expectations consistently.
- Applied digital work best practices aligned with client confidentiality and data integrity standards.
Medical Virtual Assistant | Healthcare Administrative Support
Nutrino Health
- Coordinated telehealth appointments and patient communications, supporting timely access to care while maintaining HIPAA compliance.
- Managed patient intake forms, scheduling, and virtual support workflows, reducing administrative delays in clinical operations.
- Supported revenue cycle activities by assisting with billing follow-ups and insurance pre-checks, helping prevent revenue leakage.
- Updated and maintained patient records within electronic health records (EHR) and electronic medical records (EMR) systems, improving documentation accuracy and data consistency.
- Handled sensitive patient information with strict confidentiality across all virtual interactions.
- Supported supervised clinical workflows, ensuring administrative tasks aligned with healthcare compliance standards.
Dental Billing and Insurance Support Specialist
House of Dentistry
- Prepared and submitted primary and secondary dental insurance claims using correct Current Dental Terminology (CDT) codes, reducing claim denials.
- Verified insurance eligibility and benefits, enabling accurate treatment estimates and minimizing billing errors.
- Reconciled payments, managed patient statements, and supported payment plans, improving collections transparency.
- Reviewed claim denials and coordinated corrections, contributing to faster reimbursement cycles.
- Supported front-desk financial workflows, improving patient billing experience and administrative efficiency.
- Maintained accurate billing records while adhering to insurance and compliance requirements.
Project History
Sales Performance Dashboard
https://www.notion.so/PORTFOLIO-2b756c8de00080029301e5ec3d199eb0?source=copy_linkCleaned and normalized raw sales data, built visual performance summaries, including year-over-year metrics, and designed interactive charts for executives.
This project involved designing and maintaining a real estate sales dashboard to provide a centralized view of property performance, agent productivity, and revenue trends. I structured and cleaned raw sales data, ensuring accuracy across listings, closed deals, commissions, and timelines. The dashboard provided clear visual insights into key metrics, such as monthly sales volume, conversion rates, average deal value, and agent performance.
I collaborated with stakeholders to define reporting requirements and translated business needs into intuitive data visualizations that supported faster decision-making. By automating data updates and standardizing reporting formats, the dashboard reduced manual reporting time and improved data consistency. It was actively used to monitor sales progress, identify high-performing properties and agents, and support strategic planning and marketing decisions.
My involvement directly contributed to improved visibility into sales performance, more informed forecasting, and stronger alignment between sales and marketing efforts.
Coffee Sales Excel Dashboard
https://www.notion.so/PORTFOLIO-2b756c8de00080029301e5ec3d199eb0?source=copy_linkAnalyzed multi-year sales, created filters for period selection, visualized customer segmentation, and converted messy data into a clean reporting tool.
This project focused on building an Excel-based coffee sales dashboard to analyze sales performance, product trends, and revenue patterns across multiple time periods. I cleaned, structured, and validated raw transactional data, ensuring accuracy for sales volume, revenue, product categories, and regional performance.
Using Excel formulas, pivot tables, and dynamic charts, I created an interactive dashboard that highlighted key metrics, such as total sales, average order value, top-performing coffee products, and month-over-month trends. The dashboard enabled stakeholders to quickly identify best-selling items, seasonal demand patterns, and underperforming products.
I optimized the dashboard for usability by standardizing data inputs and automating calculations, reducing manual reporting effort and improving consistency. The final solution supported data-driven pricing, inventory planning, and marketing decisions, providing clear visibility into overall sales performance.
Education
Diploma in Data Analysis
Moringa School - Nairobi, Kenya
Certifications
Administrative Professional Foundations
LinkedIn Learning
Ajira Digital Program Certificate of Completion
Ajira Digital
Skills
Tools
Asana, Trello, ClickUp
Professional Skills
Data Annotation
Administrative Operations
Executive Support, Data Entry
Communication
Executive Communication
CRM & Sales Tools
HubSpot CRM
Customer Support
Communication
Documentation
Disputes
Operations
Databases
Productivity Suites
Pivot Charts, Pivot Tables
Project Management Tools
Airtable
Quality & Performance
Policy Compliance
Security & Privacy
HIPAA
Skill Ladders
Charts
Tool Features
Reporting
Other
Data Analysis, Advanced Excel, Healthcare, SQL, Microsoft Power BI, Project Management, Administrative Support, Virtual Assistance, EMR, Electronic Health Records (EHR), HIPAA Compliance, Medical Billing Support, Patient Intake & Scheduling, Dental Billing Specialist, CDT Coding, Patient Billing & Collections, Insurance Reconciliation, Power Query, Database Management
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring