Office Manager

Liberty Personnel Services, Inc.; Philadelphia (Philadelphia County); On-site; USD 70,000 - 100,000; Full time

Job summary

Liberty Personnel Services, Inc. is seeking an experienced Billing, Payroll & Office Manager to oversee customer billing, A/R, union payroll, and daily office operations for construction projects in Philadelphia.

This hands-on role requires strong construction accounting, impeccable organization, and the ability to juggle multiple priorities while ensuring payroll accuracy and timely reporting using Sage 300 Construction and Excel.

Qualifications

• AIA billing and construction invoicing experience required.
• Strong A/R and collections experience.
• Union payroll and fringe benefit reporting experience preferred.
• Experience with Sage 300 Construction is preferred.

Responsibilities

• Manage monthly customer billing, AIA applications, online billing portals, change orders, and lien waivers.
• Monitor A/R and handle collections and billing discrepancies.
• Process weekly payroll, including union payroll and fringe benefit reporting.
• Maintain payroll and employee records and ensure compliance with union and prevailing wage requirements.
• Maintain customer/vendor records and assist with month-end accounting and reporting.
• Manage day-to-day office operations and provide administrative support to management and project teams.
• Generate reports and maintain accurate records using Sage 300 and Microsoft Excel.

Skills

AIA billing & construction invoicing

A/R & collections

Union payroll reporting

Tools

Sage 300 Construction

Job description

We are seeking an experienced Billing, Payroll & Office Manager to oversee customer billing, accounts receivable, union payroll, and daily office operations. This is a hands‑on role ideal for someone with a strong construction accounting background who is highly organized and comfortable managing multiple priorities.

Responsibilities:

• Manage monthly customer billing, AIA applications, online billing portals, change orders, and lien waivers
• Monitor A/R and handle collections and billing discrepancies
• Process weekly payroll, including union payroll and fringe benefit reporting
• Maintain payroll and employee records and ensure compliance with union and prevailing wage requirements
• Maintain customer/vendor records and assist with month-end accounting and reporting
• Manage day-to-day office operations and provide administrative support to management and project teams
• Generate reports and maintain accurate records using Sage 300 and Microsoft Excel

Qualifications:

• AIA billing and construction invoicing experience required
• Strong A/R and collections experience
• Union payroll and fringe benefit reporting experience preferred
• Experience with Sage 300 Construction desired