Accounts Payable/Receivable & HR Administrator

Mission Management Group is a boutique management group that supports service industry contractors by overseeing the internal systems and administrative operations that keep the business running smoothly. We manage the back-office functions that allow our contractors and operational teams to stay focused on delivering excellent service.

We’re hiring a Finance & HR Administration Specialist to ensure our financial and administrative systems are accurate, organized, compliant, and reliable. This is a hands-on role for someone who thrives on structure, enjoys working across departments, and can manage sensitive information with professionalism.

Important: This role is not the primary bookkeeping or accounting function. We use a third-party bookkeeping and tax firm for official financial statements and filings. This role owns the internal inputs, documentation, administration, and coordination that allow leadership and third-party partners to operate efficiently.

Core Responsibilities:

Accounts Payable (AP) — Day-to-Day Administration

• Monitor purchase orders and vendor invoices
• Code invoices to the appropriate general ledger accounts
• Route invoices for approval and ensure documentation is complete
• Ensure approved bills are paid accurately and on time
• Prepare documentation for wire transfers and payments
• Reconcile monthly credit card statements
• Maintain organized AP records and vendor files
• Support implementation, administration, and ongoing management of company card systems (e.g., Ramp)

Accounts Receivable (AR) — Billing & Collections Support

• Prepare and issue customer invoices in coordination with Operations/Sales
• Track outstanding receivables and maintain accurate AR aging reports
• Conduct monthly AR review meetings with internal teams
• Follow up on overdue accounts and document customer communications
• Escalate delinquent accounts when necessary
• Maintain accurate reporting including WIP tracking in AR reporting

Payroll, Timesheets & Reimbursements (Administrative Support)

You support payroll preparation — you do not approve or execute payroll.

• Collect employee timesheets and PTO records
• Verify completeness and accuracy of timesheets
• Prepare payroll summaries for leadership review
• Process employee expense reimbursements with proper documentation
• Submit payroll documentation for review and approval
• Log and maintain PTO records

Accounting, Taxes & Compliance (Support Role)

• Provide accurate financial documentation and inputs to third-party bookkeeping/tax partners
• Respond to requests related to bookkeeping, taxes, and insurance documentation
• Maintain organized records for financial, tax, and insurance documents
• Serve as the internal coordination point for accounting-related information

This role does not prepare financial statements, reconcile company books, file taxes, or make accounting judgments.

HR Administration

• Maintain employee and contractor records
• Coordinate onboarding paperwork (W-2s, W-9s, contracts, NDAs, policy acknowledgments)
• Coordinate background checks and drug testing (as required)
• Maintain organized personnel files and ensure documentation compliance
• Report new hires and compensation changes to required databases (ex: Texas Attorney General Child Support database)
• Support HR administrative compliance and documentation tracking

Inventory Administration

• Implement and maintain inventory tracking in QuickBooks
• Implement and manage purchase order systems in QuickBooks
• Maintain inventory records for materials, parts, and equipment
• Conduct quarterly audits and updates of inventory systems
• Track inventory usage, transfers, and adjustments
• Coordinate with Operations to resolve discrepancies and support inventory reconciliations

Fleet Administration

• Maintain records for company vehicles (insurance, registration, inspections, maintenance schedules)
• Track vehicle assignments
• Support fleet-related reporting and documentation

Pay: $55,000.00 - $60,000.00 per year

Benefits:

• Paid time off

Education:

• Associate (Preferred)

Experience:

• Human resources: 1 year (Preferred)
• Accounts payable: 1 year (Required)
• Accounts receivable: 1 year (Required)

Language:

• English (Required)

Location:

• San Antonio, TX (Preferred)

Ability to Commute:

• San Antonio, TX (Required)

Ability to Relocate:

• San Antonio, TX: Relocate before starting work (Required)

Work Location: In person