Accounts Payable Manager

• Radiant is seeking an AP Manager to own our end-to-end accounts payable operations. We process 800-1,300 invoices monthly across fragmented systems (QuickBooks, ION, and Ramp) with no automatic integration or three-way match
• This role will manage the full invoice-to-payment cycle, build scalable AP infrastructure, and establish the controls and processes needed to support our growth from prototype development through production ramp
• This is a hands-on role with significant ownership. You’ll process high volumes while simultaneously building the systems, controls, and documentation that will scale with the company
• You’ll partner closely with Supply Chain on procurement workflows and with Finance leadership on cash management strategy and ERP implementation planning
• Process 800-1,300+ invoices monthly across QuickBooks, ION, and Ramp
• Review, code, and approve invoices ensuring proper GL account assignment, project codes, and class accounting
• Perform manual three-way matching across disconnected systems until ERP implementation
• Handle employee and candidate reimbursements, corporate card reconciliations, and ad-hoc payment requests
• Manage vendor setup, W-9 collection, and vendor master data maintenance
• Execute payment runs to capture early payment discounts and avoid late penalties
• Serve as primary point of contact for 150+ active vendors; resolve inquiries, disputes, and statement reconciliations
• Coordinate with Procurement on vendor onboarding, contracts, and payment terms
• Monitor aging reports and resolve payment holds or exceptions
• Build scalable AP infrastructure with automations where possible
• Design and document AP policies, procedures, and workflows for a scaling organization
• Implement approval matrices, segregation of duties, and fraud prevention controls
• Build audit-ready documentation and support external audits
• Maximize functionality of existing tools: Ramp Pro automation, ION workflows, QuickBooks coding rules
• Document current-state processes and pain points to inform 2026 ERP requirements
• Lead AP workstream for ERP selection, implementation, and data migration
• Maintain 1099 vendor tracking and support sales/use tax compliance and annual filings
• Partner with Supply Chain and Receiving on purchase order workflows and vendor management
• Train employees on policies, Ramp usage, and invoice submission requirements
• Ownership mentality: Takes full accountability for AP operations and proactively identifies improvements
• Builder mindset: Creates scalable processes rather than just executing existing ones
• Detail-oriented: Catches errors, maintains accuracy under volume pressure, and keeps clean records
• Systems thinker: Understands how AP connects to procurement, receiving, and financial reporting
• Adaptable: Thrives in an environment where systems are imperfect and processes are evolving
• Team player: Works effectively with Supply Chain, Engineering, and Finance partners

Benefits

• Equity: Substantial incentive stock plan for all salaried employees
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
• Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits
• Vision: 100% coverage + 50% for dependents
• Dental: 100% coverage, orthodontia extra, 50% for dependent
• Flexible PTO policy
• Team-bonding company outings, happy hours and in-person camaraderie
• Beautiful El Segundo headquarters close to the Pacific Ocean

• Strong understanding of three-way match processes, GL coding, and month-end close procedures
• 5+ years of accounts payable experience, with at least 2 years in a senior or lead AP role
• Experience with 1099 reporting, sales/use tax compliance, and audit support
• Experience processing high-volume AP (500+ invoices/month) in a fast-paced environment
• Track record of building or improving AP processes and controls
• Strong communication skills for vendor management and cross-functional collaboration
• Excellent attention to detail and ability to manage competing priorities
• Proficiency with AP automation tools and ERP systems
• Experience in high-growth companies navigating significant scale
• SQL or reporting tool proficiency for building AP analytics
• Hardware, manufacturing, or aerospace/defense industry background
• Familiarity with Ramp, QuickBooks, and/or ION
• Must be willing to work extended hours and weekends as necessary to accomplish our mission
• Experience with government contract accounting (FAR/DFARS)
• Experience supporting ERP implementations or system migrations