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Guille MendezGM
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Guille Mendez

@guillemendez

I’m an HR Payroll Specialist who resolves discrepancies fast and keeps SLAs on track.

Costa Rica
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What I'm looking for

I’m looking for an HR/payroll operations role where I can validate payroll, resolve discrepancies, manage cases efficiently, and improve processes—working in a high-volume shared services environment with clear SLAs.

I’m a professional with over 3 years of experience in payroll operations, customer service, financial processes, and case management within high-volume Shared Services environments. I focus on payroll validation, discrepancy resolution, document management, and SLA compliance while maintaining confidentiality and audit readiness.

In my most recent role, I managed payroll-related processes such as employee account updates, leave requests, and payroll entries—ensuring accuracy and SLA compliance. I investigated timesheet issues and payroll discrepancies, performed data review, and maintained detailed documentation for operational and payroll processes.

Across HR, Finance, and Operations, I collaborate to resolve issues quickly and improve process efficiency. I also managed 30+ daily cases with strong attention to detail and customer service standards, while supporting continuous improvement and process standardization efforts.

Earlier experience strengthened my client-facing and troubleshooting skills through roles in customer service (including collections, reconciliations, and reporting support), technical support (L1 troubleshooting and escalations), and sales. I bring advanced Excel proficiency and hands-on experience with CRM and ticketing platforms to keep work organized, measurable, and responsive.

Experience

Work history, roles, and key accomplishments

IA

HR Leave Case Manager

Insight Global – Amazon

Mar 2025 - Feb 2026 (11 months)

Managed HR leave and payroll operations, including employee account updates and leave requests, ensuring accuracy and SLA compliance while handling 30+ daily cases. Investigated and resolved payroll discrepancies and timesheet issues, maintained audit-ready documentation, and supported continuous process improvement through cross-functional collaboration.

FV

Sales Representative

Foundever – Verizon

May 2024 - Jan 2025 (8 months)

Prospected and followed up on sales opportunities through cold calls and Slack outreach, positioning products based on industry and competitor insights. Updated KPIs in the CRM system and maintained current knowledge of products and emerging technologies to support pipeline growth.

EQ

Customer Service Rep (B2B)

Equifax

Aug 2022 - Nov 2023 (1 year 3 months)

Managed a portfolio of 100+ business-to-business client accounts, resolving payment inquiries, billing discrepancies, collections, and account reconciliation issues. Maintained accurate CRM and ticketing documentation, performed data validation/reporting support, and consistently met KPI and SLA targets in a fast-paced environment.

CA

Technical Support Agent

CSSCorp – Arris

Dec 2021 - Jul 2022 (7 months)

Provided L1 network technical support to customers and internal teams via email, chat, and phone, troubleshooting issues and escalating complex cases when needed. Documented technical interactions using G-Suite tools and collaborated with cross-functional technical teams to ensure a smooth user experience.

Education

Degrees, certifications, and relevant coursework

Guille hasn't added their education

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Tech stack

Software and tools used professionally

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