Administrative Assistance

Part-Time Administrative Assistant / Operations Support

California Plastics – Irvine, CA
Part-Time | Hourly | Flexible Schedule

About California Plastics

California Plastics is a fast-growing national distributor of engineering, specialty, and commodity thermoplastics. We work with plastic processors, injection molders, OEMs, and manufacturers across the United States, helping them source the right resin at the right price and on time.

We are a small, entrepreneurial, high-energy company where every team member makes a real impact. We are looking for a reliable, detail-oriented, and organized Part-Time Administrative Assistant to help support our daily operations, purchasing, shipping, invoicing, and customer follow-up.

Position Summary

The Administrative Assistant will help support the owner, sales team, vendors, customers, and logistics partners with day-to-day administrative and operations tasks. This role is ideal for someone who is organized, dependable, good with follow-up, and comfortable communicating by email and phone.

This is not just a basic admin role. You will help keep orders moving, customers updated, paperwork organized, and payments followed up on. The right person will be proactive, detail-oriented, and able to handle multiple tasks in a fast-moving business environment.

Key Responsibilities

Responsibilities include, but are not limited to:

• Placing purchase orders with suppliers and vendors
• Assisting with customer sales orders and order entry
• Coordinating shipments with warehouses, carriers, and freight brokers
• Checking freight rates and helping compare shipping options
• Sending tracking information and delivery updates to customers
• Following up with customers on open orders, invoices, and payments
• Sending invoices, packing lists, certificates of analysis, certificates of compliance, and other documents as needed
• Helping collect and organize regulatory documents, certifications, SDS sheets, and technical paperwork
• Communicating professionally with customers, suppliers, warehouses, and internal team members
• Assisting with accounts receivable follow-up and payment status updates
• Maintaining accurate records of orders, shipments, invoices, and customer communications
• Helping the team stay organized with spreadsheets, emails, and administrative follow-up
• Supporting special projects as needed

Qualifications

The ideal candidate should have:

• Strong attention to detail
• Excellent written and verbal communication skills
• Good organizational and follow-up skills
• Ability to manage multiple tasks without losing track of details
• Basic knowledge of Microsoft Outlook, Excel, Word, and PDF documents
• Comfortable making phone calls and sending professional emails
• Reliable, punctual, and professional
• Willingness to learn about plastics, logistics, purchasing, and distribution
• Prior experience in administration, customer service, logistics, purchasing, manufacturing, distribution, or accounts receivable is a plus
• Experience with QuickBooks, ERP systems, CRM systems, or order management software is helpful but not required

Ideal Personality Fit

We are looking for someone who is:

• Positive and professional
• Fast learner
• Calm under pressure
• Good at follow-up
• Detail-oriented
• Honest and dependable
• Comfortable working in a small-business environment
• Willing to take ownership of tasks
• Able to communicate clearly with customers and suppliers

Schedule

This is a part-time position, approximately 20–30 hours per week, with the possibility of additional hours as the company grows.

Schedule can be discussed based on the candidate’s availability and company needs.

Compensation

Competitive hourly pay based on experience.

How to Apply

Please send your resume and a brief message explaining why you would be a good fit for this role.