Senior Office & Operations Coordinator — 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. is seeking an experienced Senior Office Coordinator to support daily office and operational activities at our North Plainfield, NJ location.

The role requires handling administrative tasks, communications, inventory coordination, and follow-ups in a fast-paced environment. Ideal candidates are organized, proactive, and detail-oriented, capable of managing multiple priorities while effectively communicating across teams.

Qualifications

• 5+ 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.

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 skills

Organizational skills

Time management

Multitasking

Attention to detail

Proactive mindset

Independent work

Tools

Microsoft Office

Job description

Avantier Inc. is seeking an experienced Senior Office Coordinator to support daily office and operational activities at our North Plainfield, NJ location.

The role requires handling administrative tasks, communications, inventory coordination, and follow-ups in a fast-paced environment. Ideal candidates are organized, proactive, and detail-oriented, capable of managing multiple priorities while effectively communicating across teams.