Senior Office Coordinator Location: NJ-North Plainfield-07060 Full / Part Time

Avantier Inc; Plainfield (NJ); On-site; USD 80,000 - 105,000; Full time

Benefits offered by this job

401(k)

401(k) matching

Dental insurance

Health insurance

Paid time off

Vision insurance

Job summary

Avantier Inc in North Plainfield, New Jersey, is seeking an experienced Senior Office Coordinator to support daily office and operational activities.

You will manage administrative tasks, invoicing, emails, inventory coordination, and cross‑functional communications in a fast‑paced environment. The ideal candidate is organized, proactive, detail‑oriented, and able to juggle multiple priorities with clear, effective teamwork.

Qualifications

• 5+ years 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.
• Excellent organization and time-management abilities.

Responsibilities

• 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.

Skills

Communication

MS Office

Organization

Multitasking

Attention to detail

Independent work

Phone handling

Tools

MS Office

Job description

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Paid time off
• Vision insurance

Senior Office Coordinator

Location: North Plainfield, New Jersey

Company: Avantier – Premium Custom Optics Manufacturer

Base Salary: $80,000 - $105,000

About Avantier Inc.

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.

Position Overview

Avantier is seeking an experienced Senior Office Coordinator 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.

Key Responsibilities

• 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

Qualifications

• 5+ years of experience in an office coordination, administrative, or operations support role
• Experience with invoicing, documentation, inventory management, and phone handlingStrong 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

Why Join Avantier

• 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

Additional Information

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