Summary
Overview
Work History
Education
Skills
Certification
Timeline
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Mario Collier

Chicago

Summary

Dedicated Customer Service Specialist providing skills to prioritize and multi-task in fast-paced working environment. Successfully works as part of team to reach personal and business goals. Known for successfully handling escalated customer support issues.

Overview

15
15
years of professional experience
1
1
Certification

Work History

Customer Service Representative

Chicago Transit Authority, CTA
Chicago
07.2023 - 02.2025
  • Resolved customer complaints promptly and efficiently
  • Worked with team members to ensure efficient workflow throughout the day.
  • Transported individuals requesting wheelchair service to and from desired locations.
  • Sweep, mop and vacuum floors of all areas.

Package Handler

Walgreens
Chicago
06.2020 - 05.2023
  • Stacked boxes onto pallets in an efficient manner.
  • Assisted in training new employees on package handling processes.
  • Resolved conveyor system issues by clearing jams and blockages.
  • Picked products using RF scanner to fill orders.
  • Assisted in loading delivery trucks with prepared packages.

Laborer

CleanSlate
Chicago
01.2018 - 11.2020
  • Assisted with basic maintenance tasks such as sweeping, mopping, painting, and cleaning.
  • Cleaned work area after job completion ensuring all debris is properly disposed of.
  • Maintain janitorial supply inventory.
  • Disinfect equipment and supplies using germicides or steam-cleaning equipment.

Crew Chief

Portillo's Restaurant Group
Chicago
06.2010 - 11.2017
  • Conducted regular performance reviews to ensure quality standards were met.
  • Managed daily operations of team members to ensure efficient and successful completion of tasks.
  • Accomplished team objectives by effectively directing daily activities.
  • Resolved customer complaints regarding food quality or service issues.
  • Stored foods correctly using correct storage containers and labelling systems.
  • Trained new chefs on proper cooking techniques and menu items.
  • Delegated tasks and supervised kitchen staff to optimize food preparation, presentation and safety.

Education

GED -

Dunbar Vocational H.S
Chicago, IL
09-2001

J.D. - Psychology

Kennedy King College
Chicago, IL

Skills

  • Conflict resolution
  • Team collaboration
  • OSHA Certified
  • Complaint management
  • Inventory management
  • Employee training
  • Retail store support
  • Customer relations
  • Food Handlers License
  • Workplace safety
  • Multi-task management

Certification

  • Food Handler License
  • OSHA Certificate

Timeline

Customer Service Representative

Chicago Transit Authority, CTA
07.2023 - 02.2025

Package Handler

Walgreens
06.2020 - 05.2023

Laborer

CleanSlate
01.2018 - 11.2020

Crew Chief

Portillo's Restaurant Group
06.2010 - 11.2017

GED -

Dunbar Vocational H.S

J.D. - Psychology

Kennedy King College

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Mario Collier