Marina Sigala
Rogers
Summary
Strategic Senior Analyst with 7+ years of experience driving high-impact fraud detection, investigation, and prevention initiatives. Known for uncovering complex, organized fraud networks through holistic pattern and trend analysis while maintaining high confirmation accuracy. Proven leader in cross-functional collaboration, process optimization, and scalable fraud operations, with a track record of improving tooling, workflows, and team alignment to deliver measurable risk reduction.
Overview
8
8
years of professional experience
Work History
Senior Analyst, Trust and Safety
Walmart Inc.
Bentonville
10.2024 - Current
- Built centralized fraud knowledge resources to unify Trust and Safety Fraud teams and improve access to workflows and insights.
- Layered multiple data sources and behavioral signals to uncover coordinated fraud networks.
- Drove significant fraud tooling and workflow enhancements by identifying systemic gaps and proposing scalable improvements.
- Identified and escalated organized fraud networks involving 800+ driver accounts using falsified documents, enabling enhanced identity and insurance validation checks.
Team Lead, Customer Engagement Services
Walmart Inc.
Bentonville
08.2021 - 10.2024
- Led the implementation of a skill-based scheduling approach, driving sustained service level improvement from 25% to 80%+.
- Played a key role in integrating a newly acquired brand’s operations into Walmart’s enterprise processes and programs.
- Mentored and coached Resolution Specialists to ensure successful performance by weekly one on one conversations, personal development, and team huddles.
Senior Resolution Coordinator, Fraud Operations
Walmart Inc.
Bentonville
11.2017 - 08.2021
- Trained and knowledgeable in the Chargeback process of 6 different processors.
- Utilized extensive knowledge of Walmart systems and Fraud trends to meticulously compile information essential for accurate dispute resolution.
- Successfully retained $1,635,699.70 for the company through effective dispute management and resolution during my tenure as an agent.
Skills
- Servant Leadership
- Fraud analysis
- Stakeholder communication
- Process Improvement
- Complex Problem-solving
Timeline
Senior Analyst, Trust and Safety
Walmart Inc.
10.2024 - Current
Team Lead, Customer Engagement Services
Walmart Inc.
08.2021 - 10.2024
Senior Resolution Coordinator, Fraud Operations
Walmart Inc.
11.2017 - 08.2021