Office Administrator Location: NJ-North Plainfield-07060 Full ​/ Part Time

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Opportunity for advancement
• Paid time off
• Training & development
• Vision insurance

Location: North Plainfield, New Jersey

Company: Avantier – Premium Custom Optics Manufacturer

Base Salary: $50,000 - $65,000

At Avantier, you won’t just “have a job”—you’ll work on real, cutting-edge technology used in aerospace, defense, and life sciences.

We are a global photonics company (25+ years), specializing in custom optical design, engineering, and manufacturing for high-tech industries worldwide.

Avantier is seeking an experienced Office Administrator to support daily office and operational activities. We are looking for someone who has previously worked in a similar role and can confidently manage administrative tasks, communication, inventory coordination, and follow-ups in a fast-paced environment.

The ideal candidate is organized, proactive, detail-oriented, and comfortable managing multiple priorities while communicating effectively across teams.

• Prepare packing slips, invoices, and related documentation
• Manage emails, follow-ups, and internal/external communication
• Prioritize tasks based on urgency and business needs
• Maintain office procedures, records, and organizational systems
• Assist with inventory tracking and office supply coordination
• Handle incoming phone calls and route inquiries appropriately
• Support managers and cross-functional teams with daily operations
• Identify and communicate issues proactively
• Assist with ad-hoc operational, administrative, and office tasks as needed

• 2+ years of experience in an office coordination, administrative, or operations support role
• Experience with invoicing, documentation, inventory management, and phone handling
• Strong written and verbal communication skills
• Proficient in Microsoft Office (Excel, Outlook, Word)
• Strong organizational and time management skills
• Ability to multitask and work independently
• High attention to detail and accuracy
• Self-motivated with a proactive mindset

• Competitive compensation and full benefits (Medical, Dental, Vision, 401k)
• Opportunity to work in a growing high-tech industry
• Collaborative, hands-on environment with real impact

• Work Hours: Monday–Friday, 9:00 AM – 6:00 PM
• Work Location: In-person (5 days/week)
• Job Type: Full-time