Senior Office Coordinator - High-Tech Ops & Admin (On-site)

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

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.