Onsite Office & Operations Manager: AR/AP, Payroll, HR

BBSI; South San Francisco (CA); On-site; USD 80,000 - 100,000; Full time

Job summary

BBSI in South San Francisco, CA is seeking an experienced Office Manager to oversee day-to-day administrative operations for the onsite office, supporting both office and field teams. You will manage AR/AP, payroll, bookkeeping, and HR coordination, develop procedures to improve efficiency, and supervise front-office staff while maintaining accurate records and compliance with company standards.

Open to candidates with strong operational experience in fast-paced environments, with a proactive

Qualifications

• Prior experience in office management, accounting, or administrative leadership.
• Background in construction or a related industry strongly preferred.
• AR/AP, payroll, and bookkeeping knowledge.
• Strong communication skills with field teams.
• Proactive mindset with ability to identify gaps and improvements.
• Comfortable working onsite.

Responsibilities

• Manage daily office operations and administrative workflows.
• Oversee accounts receivable and accounts payable processes.
• Perform bank reconciliations, bookkeeping, and payroll.
• Handle prevailing wage administration (basic level).
• Support HR functions, including employee documentation.
• Process insurance certificates.
• Supervise front office activity (3 staff).
• Develop and implement SOPs to improve efficiency.
• Ensure accurate record-keeping and compliance with company standards.

Skills

Office management

Accounting

Administrative leadership

AR/AP

Payroll

SOP development

Communication skills

Onsite work

Job description

BBSI in South San Francisco, CA is seeking an experienced Office Manager to oversee day-to-day administrative operations for the onsite office, supporting both office and field teams. You will manage AR/AP, payroll, bookkeeping, and HR coordination, develop procedures to improve efficiency, and supervise front-office staff while maintaining accurate records and compliance with company standards.

Open to candidates with strong operational experience in fast-paced environments, with a proactive