Open to opportunities

Luis Carlos Madera Guerrero

@luiscarlosmaderaguer

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Data Analyst focused on database management, Excel insights, and customer support.

Colombia

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What I'm looking for

I’m looking for positions that allow me to increase my knowledge in data/Excel and customer support, while contributing my own experience. I want a dynamic environment where I can grow professionally and develop new skills.

I bring more than 3.2 years of experience in data management and analysis, databases, and customer service through e-mails. I’m comfortable turning raw information into organized records and actionable insights using structured Excel workflows.

I’ve supported back-office operations such as bank dispute resolution, document validation, and data validation. I also handle customer service support (tickets, e-mails) and maintain accurate communication to keep processes moving smoothly.

In my roles, I managed databases, created conditional Excel tables, and worked with inventories—supervising and archiving information when needed. I’ve also contributed in administrative environments by running PC general use tasks and applying Microsoft Office tools.

Most recently, I’ve expanded into logistics-focused customer service and commercial support, including document validation, route tracking, invoice tracking, and cold sales of transport and freight services. With my English skills (B2+ and advanced), I aim to keep growing in a dynamic, professional team.

Experience

Work history, roles, and key accomplishments

Carrier Sales Specialist

Gentle Lean Solutions Group

Jun 2025 - Jan 2026 (7 months)

Handled customer service in logistics, performing cold sales calls and phone/email support while validating documents and managing routing. Tracked routes and monitored invoices for transportation and freight services.

Cold Calling Customer Service Logistics Support Validation Sales Support Back Office Operations

Inventory & Excel Admin

Universidad Mayor de Cundinamarca

Apr 2024 - Feb 2025 (10 months)

Managed Excel-based operations for inventory administration, including creation and supervisory archival tasks. Supported information organization and warehouse/inventory related documentation workflows.

Excel Supervisory Archiving Data Entry Back Office Administration Documentation Management

Data Analyst / Archivist

Data & Datos S.A

Mar 2024 - Apr 2024 (1 month)

Provided customer service support and handled archival/data organization tasks in a data-focused role. Supported information management with Excel and administrative documentation workflows.

Archival Management Customer Service Excel Back Office Support Data Entry Information Management

Data Analyst

Teleperformance Colombia

Aug 2023 - Mar 2024 (7 months)

Validated documents and analyzed account-related data for USA card/accounts, supporting customer requests. Maintained Excel usage for medium-level data handling and reporting.

Data Analysis Validation Customer Service Excel Account Support Data Verification PC Proficiency

Data Analyst

Data & Datos S.A

Jan 2022 - Aug 2023 (1 year 7 months)

Managed databases and medium-level Excel reporting for agro-business product import/export records, including data entry and administrative email/voice support. Performed back-office tasks and customer service support related to data and documentation.

Excel Database Management Data Analysis Data Entry Customer Service Back Office Administration Data Imports Document Support