Jeison Sierra
Brockton
Summary
Detail - oriented and highly organized Office Manager with strong experience in administrative operations, executive support, and human resources. Promoted from HR Generalist based on performance and leadership. Proven ability to manage executive schedules, coordinate domestic and international travel, prepare reports, and support company-wide operations with professionalism and confidentiality.
Overview
7
7
years of professional experience
1
1
Certification
Work History
Office Manager
We Care 365
United States
11.2021 - 01.2026
- Reported directly to the Administrative Director, providing executive and operational support, transitioned from HR Generalist to Office Manager based on performance and leadership
- Managed onboarding logistics for incoming staffs, coordinated domestic and international travel, including flights, hotel accommodations and itineraries for new employees.
- Prepared monthly inventory reports and tracked office and Marketing Supplies.
- Managed VP's calendar, scheduled meetings, travel, and priorities.
- Assisted with employee performance reviews and administrative documentation and maintained confidentiality of employee and executive information
- Handled vendor communications and service contracts effectively.
- Implemented office policies to enhance productivity and organization.
Certified Sales Associate
Charters Communications
United States
12.2020 - 10.2021
- Provided excellent phone services for internet, mobile phones, TV cable, and landline phones while assisting customers with federal discount applications.
- Increased revenue through effective upselling and cross-selling techniques.
- Exceeded sales goals through strategic prospecting and territory management.
- Mentored new sales associates, Sharing proven strategies for success in the role
Medical Call Center Representative
Maximus
United States
10.2018 - 11.2019
- Managed inbound and outbound calls to assist patients with medical inquiries.
- Coordinated appointment scheduling for patients with healthcare providers.
- Resolved customer issues by utilizing effective communication skills.
- Provided information on health programs and services available to clients.
- Entered patient data into electronic health records accurately and efficiently.
- Followed HIPAA guidelines when handling confidential patient information.
- Trained new representatives on call handling procedures and systems.
Education
High School Diploma -
Richard C. Spoto High School
Tampa, FL05-2018
Skills
- Office and Operations Management
- HR Administration and Onboarding
- Employee record management
- Performance review support
- Executive and Calendar Management
- Travel Coordination (Domestic and International)
- Procurement and Vendor Coordination
- Inventory Tracking and reporting
- Microsoft office, Google workspace and HRIS Systems
- Multitasking and Time management
- Confidential Documentation
Languages
Spanish
Native/ Bilingual
Certification
CPR Certified
Accomplishments
Employee of the Year 2025
Timeline
Office Manager
We Care 365
11.2021 - 01.2026
Certified Sales Associate
Charters Communications
12.2020 - 10.2021
Medical Call Center Representative
Maximus
10.2018 - 11.2019
High School Diploma -
Richard C. Spoto High School