Yahaira Contreras
San Leandro
Summary
Detail-oriented Manufacturing and Quality Professional with a B.S. in Manufacturing Engineering and experience in startup environments. Supports operations and quality systems while driving continuous improvement through cross-functional collaboration. Committed to enhancing processes and ensuring compliance, seeking to advance into higher-impact engineering roles.
Overview
3
3
years of professional experience
Work History
Quality Technician II
Twelve Benefit Corporation
Alameda
05.2024 - 12.2025
- Conducted inspections and testing, documenting findings to verify products met internal specifications and quality standards.
- Perform material characterization using white light profilometer, XRF, microscopy, and thickness measurement tools.
- Conducted ink Characterization (viscosity, particle distribution, uniformity) to support process optimization.
- Perform electrode material processing, including mixing powders, tap density, coating, and material preparation.
- Partnered with manufacturing, quality, and R&D teams to address quality issues, enhancing process reliability.
- Assisted with the investigation of nonconformance reports, root cause analysis, and corrective/preventive action.
- Supported quality operations for pilot production processes, ensuring compliance in high-growth startup environment.
- Led technical training sessions and develop structured onboarding itineraries with live demos and PowerPoint presentations.
- Analyze process data using SQL and Excel to monitor trends and performance metrics.
- Maintained accurate quality records, reports, and logs to support audits and continuous improvement initiatives.
- Contribute to scale-up activities by adapting the quality process to evolving production needs.
- Assemble and prepare a single cell for electrochemical testing, formation, and performance validation.
Production Manager
BeetleBILT
San Leandro
01.2023 - 01.2024
- Analyzed and planned sites production based on current and anticipated business needs, considering factors such as unexpected sales opportunities, site capacity, and equipment requirements.
- Led a team of three by creating production schedules to maintain optimal inventory levels of raw materials, ensuring smooth production operation while maximizing profitability.
- Worked with production teams on the 3-spine system operation and troubleshooting techniques, empowering employees to resolve issues independently and maximize uptime.
- Maintained machines to ensure optimal operation by identifying and managing key production quantities.
- Provided data and guidance to operations teams, optimizing supply chain for timely execution of demand plan.
- Collaborated with leads across functional areas, aligning production schedules with business objectives.
Education
Bachelor of Science - Engineering Technology, Manufacturing Systems
San Jose State University
Santa Clara01-2021
Skills
- Production scheduling
- Inventory management
- Testing protocols
- In-process inspection
- Non-destructive testing
- Measurement techniques
- Inspection techniques
- Visual inspection
- Precision measurement tools
- Process monitoring
- Sampling procedures
- Final inspection
- Product testing
- Production logging
- Quality reporting
- Dimensional inspection
- Root cause analysis
- Inventory control
- Sampling methods
- Continuous improvement
- Leadership
- Team collaboration
- Teamwork
- Collaboration
- Strong communication
- Critical thinking
- Problem solving
- Attention to detail
- Time management
- Organization
- Sampling methods
- Continuous improvement
Affiliations
- Epsilon Pi Tau Honor Society, As a member of Epsilon Pi Tau, we have the opportunity to participate in a variety of activities and programs aimed at promoting excellence in technology education and practice. With networking events, professional development workshops, community service projects, and academic conferences.
- Sigma Pi Alpha Sorority Inc., As a member of Sigma Pi Alpha, we have the opportunity to participate in various activities and programs aimed at promoting academic excellence, cultural awareness, and community service. These include academic workshops, cultural celebrations, community outreach projects, and leadership development seminars.
Languages
- Spanish
- English
- Spanish
Technical Skills
Mixing, Powder Handling, Roll-to-Roll Processing, Cell Assembly, Testing Support, Moisture-sensitive Materials, White Light Profilometer, XRF Analysis, Thickness Measurement, Surface Measurement, Microscopy, Ink Characterization, SQL Data Analysis, Excel & Technical Reporting, Process Data Trending, Six Sigma, NCR Documentation, PFMEA Participation, Root Cause Analysis, SOP Development, Detailed Process Documentation, Preventative Maintenance Support, Preventive Maintenance, Equipment Calibration, Pilot-Scale Manufacturing, 5s Program, Cross-Functional Collaboration, Expert in Google Suite and Zoom, Microsoft Office Suite, HEX, Adobe, Confluence, Jira, Asama, Outlook
Languages
English
Professional
Spanish
Professional
Timeline
Quality Technician II
Twelve Benefit Corporation
05.2024 - 12.2025
Production Manager
BeetleBILT
01.2023 - 01.2024
Bachelor of Science - Engineering Technology, Manufacturing Systems
San Jose State University