Construction Office Administrator

Atlantic Contracting & Material Co., Inc. is a general contractor based in the Washington Metropolitan Area. Specializing in heavy and highway construction in the public and private sector.

This is a full-time, on-site position for an Office Administrator, located in Chantilly, VA. 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.

• 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.

• 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.