Guillermo Toso Sayan

Guillermo Toso Sayan

About

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Data Analyst
Lima, Peru
Contact Guillermo regarding: 
work
Full-time jobs
Starting at USD9/hour
Flexible work
Starting at USD9.4/hour

Timeline

work
Job

Résumé

Jobs verified_user 25% verified
  • iVisa
    Operations - Fraud and Chargeback Analyst public Remote experience
    iVisa
    Nov 2024 - Apr 2025 (6 months)
    • Supervision of payment gateways (Braintree, Stripe, Airwallex, Bluesnap, NMI, Easy Pay Direct) and transaction analysis to detect potential fraud.
    • Provided customer support via email and phone, ensuring prompt confirmation of refunds and conducting identity verification for fraud prevention.
    • Utilization of Google Sheets, Tableau, and Looker Studio to create reports and visualizations that support data-driven decision-making, while also leveraging Microsoft 365 tools such as Excel and Word for enhanced data management and documentation.
    • Negotiated with vendors such as Kount regarding transaction contract terms, successfully reducing costs from $0.09 to $0.07 per transaction, which enhanced our fraud analysis capa
  • Teleperformance Colombia
    Business Intelligence Supervisor for Peru, Colombia and Guyana verified_user Verified experience public Remote experience
    Teleperformance Colombia
    Nov 2023 - Jul 2024 (9 months)
    • Lead and coordinate teams of BI analysts and data specialists, ensuring the correct planning and implementation of projects; as well as, lead the monitoring, execution and improvement of reports, presentations and analysis for eleven (11) different assigned campaigns.
    • Facilitate interdepartmental communication and negotiation to offer solutions that meet the needs of the business and clients.
    • Collaborate with multidisciplinary and multicultural teams to define requirements and deliver BI solutions, promoting collaborative and results-oriented work.
    • Create insights and analysis in real time, facilitating effective communication with senior management of the campaigns and the client.
    • Train internal users
  • Teleperformance Colombia
    Bilingual Business Intelligence Analyst for Peru and Colombia public Remote experience
    Teleperformance Colombia
    Sep 2022 - Nov 2023 (1 year 3 months)
    • Designed and maintained reports to monitor, control, and improve the indicators (KPI) of four (4) different assigned campaigns and their respective support areas (workforce, quality, operations, training).
    • Collected, cleaned, updated, and analyzed data to prepare reports of results, follow-ups, and alerts to the leaders of the various areas and clients; utilizing SQL, Power BI, and Excel, while effectively communicating the findings.
    • Ensured that the reports were aligned with the Six Sigma methodology, meeting the quality and punctuality standards required by each client; identified trends and patterns to continuously seek opportunities for improvement in reporting and indicators.
    • Automated reports and dashboard
  • Divemotor
    Intern
    Divemotor
    Sep 2021 - Jul 2022 (11 months)
    • Collect, organize and interpret data to generate Excel reports from sales in the commercial area for Diveimport and Andes Motor.
    • Collect and organize information from more than 6,000 clients to build databases for Diveimport and Andes Motor using Excel.
    • Perform due diligence on more than 180 clients, employees and suppliers. Then I wrote a summary of the main warning signs.
    • Generate monthly reports and presentations on the Whistleblower Channel using Excel and Power Point.
    • Achieved four (4) successful audits by monitoring and prioritizing the workflow related to audits through GANTT.
Education verified_user 0% verified
  • University of Lima
    Bachelor of Engineering
    University of Lima