A well-established, family-owned manufacturing and distribution company in Ontario, CA is seeking an experienced Office Manager for a stable, long-term direct hire opportunity. This 100% onsite role is ideal for a hands-on administrative professional who enjoys taking ownership of office operations, accounting support, payroll, HR administration, compliance, and daily business processes.
The Office Manager will serve as a key operational resource for a small, close-knit office team supporting an active manufacturing, field, and logistics workforce. This is a great fit for someone who values consistency, accountability, and teamwork in a collaborative environment. The company offers steady hours, supportive leadership, and the opportunity to become a trusted contributor within a long-tenured organization.
Key Responsibilities
- Manage daily office operations, administrative workflows, reporting, filing systems, office supplies, customer support, and backup reception coverage.
- Oversee Accounts Payable, Accounts Receivable, invoice processing, vendor payments, customer accounts, bank deposits, petty cash, and monthly reconciliations.
- Process weekly payroll, maintain time and attendance records, track PTO and vacation calendars, and manage payroll deductions, garnishments, and reporting.
- Support HR administration including new hire onboarding, employee files, employment verifications, performance documentation, benefits administration, and 401(k) reporting.
- Maintain compliance documentation including workers’ compensation claims, OSHA logs, DOT and Non-DOT drug testing, DMV Employer Pull Notices, permits, licenses, registrations, and insurance records.
- Prepare management reports, sales reports, budget-to-actual reports, sales and use tax reports, customer agreements, and general business documentation.
Compensation and Benefits
- Pay: $62,400 to $80,000 annually, depending on experience.
- Schedule: Monday through Friday, 7:00 AM to 3:30 PM.
- Work Arrangement: 100% onsite in Ontario, CA.
- Job Type: Direct hire.
Additional Skills
Required Qualifications and Skills
- Manage office operations for a small manufacturing and distribution environment.
- Lead payroll, HR administration, accounting, compliance tracking, and business reporting.
- Maintain accurate financial records using QuickBooks Desktop and advanced Excel reporting.
- Support multiple entities with Accounts Payable, Accounts Receivable, reconciliations, and payroll-related reporting.
- Bachelor's degree in business management, human resources, finance, accounting or similar field of study
- 3+ years of recent Office Management experience required.
- Strong experience in accounting, payroll, HR administration, and office operations.
- Proficiency with QuickBooks Desktop.
- Advanced Microsoft Excel skills, including formulas, reconciliations, reporting, and data analysis.
- Experience managing Accounts Payable, Accounts Receivable, payroll, bank reconciliations, and general ledger support.
- Knowledge of workers’ compensation, employee benefits, onboarding, employee records, and HR compliance practices.
- Strong organizational, communication, follow-through, and problem-solving skills.
- Ability to work independently, manage multiple priorities, and maintain accuracy with minimal supervision.
- Comfortable working in a small office environment and supporting a hands-on, team-oriented operation.
Preferred Qualifications
- Bilingual English/Spanish is a plus.
- Experience supporting a manufacturing, distribution, transportation, logistics, or field-service workforce.
- Familiarity with Paychex Payroll, Payroll Link, DOT compliance, DMV Employer Pull Notices, OSHA 300 logs, and motor carrier documentation.
Office Manager • Ontario, CA
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