Office Administrator

Atlantic Contracting & Material Co., Inc.; Chantilly (VA); On-site; USD 50,000 - 70,000; Full time

Benefits offered by this job

401k

Health & Dental Insurance

Work Vehicle

Fuel Card

Phone Reimbursement

PTO

Job summary

Atlantic Contracting & Material Co., Inc. is seeking an Office Administrator in Chantilly, Virginia. This role involves managing daily administrative tasks such as office organization, accounts payable processes, and employee onboarding. The ideal candidate has 3–5 years of experience in administrative roles, strong organizational skills, and proficiency in Microsoft Office Suite. Offering a competitive salary, benefits package including PTO, and a collaborative work environment emphasizing teamwork and safety.

Qualifications

• 3–5 years of experience in senior administrative or executive assistant roles.
• Strong attention to detail and accuracy.
• Proactive and dependable work style.

Responsibilities

• Provide administrative support to the office leadership team.
• Manage the Accounts Payable process between office and field teams.
• Assist new employees with onboarding paperwork and job-specific documentation.
• Organize and support departmental meetings.
• Complete HR administrative tasks including compliance and benefits.
• Manage or support special projects as assigned.

Skills

Organizational skills

Communication skills

Proficiency in Microsoft Office Suite

Analytical abilities

Spanish language skills

Tools

Microsoft Excel

Microsoft Word

Microsoft Outlook

Concur expense reporting

Job description

The Office Administrator will manage daily administrative tasks such as organizing office operations, maintaining office equipment, coordinating schedules, and providing customer service support. Responsibilities will also include efficient communication within the team, liaising with vendors and stakeholders, and ensuring smooth daily office operations in a dynamic work environment.

Responsibilities

Provide administrative support to the office leadership team.

Manage the Accounts Payable process between office and field teams.

Assist new employees with onboarding paperwork and job-specific documentation.

Organize and support departmental meetings, including scheduling, preparing materials, and managing budgets.

Coordinate day‑to‑day project administration such as permits, payroll, and mail.

Complete HR administrative tasks and reporting, including onboarding, compliance, benefits, and termination paperwork.

Maintain confidentiality and integrity of sensitive HR and management records.

Manage or support special projects as assigned.

Requirements

Strong organizational skills with excellent attention to detail and accuracy.

Effective written and verbal communication skills.

Proficient in Microsoft Office Suite (Excel, Word, Outlook) and similar office systems; experience with Concur expense reporting.

3–5 years of experience in senior administrative or executive assistant roles.

Strong analytical abilities and a proactive, dependable work style.

Spanish language skills (spoken and written) are a plus.

What We Offer

Competitive salary and benefits package.

401k, Health & Dental Insurance, Work Vehicle, Fuel Card, Phone Reimbursement, PTO

A collaborative, supportive work environment with a strong emphasis on teamwork.

About The Company

ACM is a heavy civil general contracting company specializing in concrete paving, site development, material crushing & recycling, concrete production, underground utilities, and demolition.

With decades of experience and a strong reputation across the Mid-

Atlantic region, ACM is committed to quality craftsmanship, safety, and professional growth.