Meet our leadership team

David Chao

President & Chief Executive Officer

With more than 23 years of experience in international rubber and plastics manufacturing, David Chao leads COI Rubber Products with a focus on strategic growth, global manufacturing, and long-term customer relationships.

His extensive background in international business development, supply chain management, and manufacturing operations has shaped COI's commitment to quality, operational efficiency, and customer satisfaction.

Under his leadership, COI continues to invest in technology, manufacturing capabilities, and innovative business systems to better serve customers across diverse industries.

Vivian Chao

Chief Financial Officer

Vivian Chao oversees the financial operations of COI Rubber Products, providing financial leadership, fiscal accountability, and strategic oversight.

Working closely with executive leadership, she supports responsible financial management, long-term business stability, and sustainable organizational growth.

Her leadership helps ensure COI maintains the financial strength and operational discipline necessary to support customers, employees, and manufacturing operations.

Napoleon Castillo

Vice President of Sales

Napoleon Castillo leads COI Rubber's sales organization, overseeing strategic customer relationships, commercial development, and sales initiatives.

He works closely with customers and internal teams to identify manufacturing opportunities, coordinate technical requirements, and build long-term partnerships.

His leadership emphasizes responsiveness, customer satisfaction, and the development of sustainable business relationships.

Daniel Nguyen

Sales Manager

Daniel Nguyen manages daily sales activities and supports customer relationship development across COI Rubber's commercial organization.

Working closely with the Vice President of Sales, he coordinates sales initiatives, supports business development personnel, and helps ensure consistent customer communication throughout the sales process.

Marcos Soto

Business Development Manager

Marcos Soto focuses on expanding COI Rubber's customer base through new business development, prospective customer engagement, and industrial market opportunities.

Working alongside the sales management team, he helps identify customer manufacturing requirements and connect prospective accounts with COI's custom rubber and plastics capabilities.

Jack Apollo

Sales Support

AI team member

Jack Apollo is an AI team member supporting sales research and outreach preparation. Human team members review business decisions and customer commitments.

Suzie Vapi

Market Research

AI team member

Suzie Vapi is an AI team member supporting market research and potential-customer research. It is an AI tool, not a human employee. Human team members handle business decisions and customer commitments.

Ana Castillo

Accounts Receivable

Ana Castillo supports COI Rubber's financial operations through accounts receivable management, customer billing coordination, and financial administration.

Her role contributes to organized financial processes, accurate customer account records, and responsive account communication.

Andrea Wittenbarger

Executive Assistant

Andrea Wittenbarger provides executive and administrative support, helping coordinate day-to-day communication and organization for COi Rubber leadership.

Phien Nguyen

Production Manager

Phien Nguyen supports production planning and coordination, working with manufacturing and customer-facing teams to help meet customer production requirements.

Bill She

Plant Manager

Bill She oversees manufacturing operations at COI-owned production facilities in China.

He supports production planning, manufacturing coordination, operational efficiency, and plant performance.

His leadership contributes to consistent manufacturing execution and the fulfillment of customer production requirements.

Toni He

Quality Control

Toni He supports quality control activities within COI Rubber's manufacturing operations.

The role focuses on product inspection, manufacturing quality standards, and ensuring production activities align with applicable customer specifications.

Toni's work contributes to COI's commitment to dependable product quality and continuous improvement.