Spanish Literature -
California State University, Channel Islands
Camarillo, CA 08.2015 - 05.2021
Oscar Sierra-Balderas
Human Resources Specialist | Safety & Operations | Army Reservist | Bilingual (EN/ ES)
Chula Vista,CA
Summary
Disciplined Army-trained Human Resources Specialist and Safety Associate with experience in incident management, compliance, and organizational operations. Recognized for reliability, attention to detail, and strong leadership under pressure. Fully bilingual (English/Spanish) with proven ability to manage sensitive information and enhance workplace efficiency.
Education
Military Training and Education
434th Field Artillery Brigade - Basic Combat Training: U.S. ARMY SOLDIER GRADUATE
Fort Sill, OK
07/24
Adjutant General School - 42A Course: HUMAN RESOURCES SPECIALIST GRADUATE
Fort Jackson, SC
09/24
NCO Academy Parks - Basic Leader Course: NON-COMMISSIONED OFFICER CERTIFIED
Camp Parks, CA
06/25
Work History
Human Resources Specialist
United States Army Reserves
Garden Grove, CA
10.2024 - Current
• Supported multinational training exercise Talisman Sabre 2025 (Australia), serving as the primary assistant to the
HR Captain.
• Delivered daily operational updates and morning briefings to leadership, ensuring accurate personnel reporting for
mission execution.
• Managed personnel status tracking across multiple units, contributing to operational readiness.
• Adapt to dynamic environments under strict timelines and high accountability.
Safety Support Associate (ASC) Inbound Operations
Amazon.com Fulfillment Center
San Diego, CA
10.2023 - Current
• Document incidents, collect statements, and escalate safety concerns to the Safety Manager and Site Leader.
• Monitored high-risk areas (Hazmat / Pick & Stage) and ensured compliance with standard operating procedures.
• Lead associate for inbound operations including Pick, Stage, and Pick-to-Buffer tasks.
• Recognized for professionalism and reliability; selected to support safety walkthroughs and help onboard new hires.
Skills
Technical Skills: Microsoft Office, IPPS-A, HR systems
Operational Skills: Incident reporting, surveillance, safety compliance
Soft Skills: Communication, leadership, adaptability
Accomplishments
• Scored 550 / 600 on the Army Combat Fitness Test (ACFT).
• Graduated Basic Leader Course (June 2025), demonstrating leadership potential and supervisory readiness.
• Successfully operated within a joint-forces multinational environment during Talisman Sabre 2025.
Certification
Safety & Compliance Certifications:
- RCRA Hazardous Waste Authorized Training
- DOT Hazardous Waste Shipper Training (EHS)
- Basic Spill Response North America
Military Administrative & Leadership Training:
- Integrated Personnel and Pay System–Army (IPPS-A) HR PRO
- Basic Leader Course (Army) – June 2025
- SERE 100.2 Level A – Code of Conduct & Survival Awareness
- Level 1 Antiterrorism Awareness Training
Mandatory DoD & Workplace Compliance Training:
- Department of Defense (DoD) Cyber Awareness Challenge 2025
- HIPAA & Privacy Act Training
- Equal Opportunity & SHARP Awareness