Accounts Payable Manager

Radiant Nuclear; El Segundo (CA); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

Medical benefits

Equity incentive

Flexible PTO

Vision and dental coverage

Hybrid team activities

Job summary

Radiant in El Segundo, CA seeks an AP Manager to own end-to-end accounts payable operations across QuickBooks, ION, Ramp with no automatic integration. You will lead the invoice-to-payment cycle, build scalable AP controls, and partner with Finance and Supply Chain on cash management and ERP planning.

You will manage 800-1,300 invoices monthly, ensure proper GL/class coding, perform three-way matching, and drive process improvements in a fast-growing environment.

Qualifications

• Strong understanding of three-way match processes, GL coding, and month-end close
• 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
• Familiarity with Ramp, QuickBooks, and/or ION
• Experience with government contract accounting (FAR/DFARS)
• Experience supporting ERP implementations or system migrations
• 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)

Responsibilities

• Own end-to-end accounts payable operations
• Process 800-1,300 invoices monthly across multiple systems
• Build scalable AP infrastructure and controls
• Partner with Supply Chain and Finance on workflows and cash management
• Manage vendor setup, W-9 collection, and master data
• Execute payment runs to capture early payment discounts
• Lead AP workstream for ERP selection, implementation, and data migration
• Maintain 1099 vendor tracking and tax compliance
• Train employees on policies and Ramp usage
• Design and document AP policies for scaling organization
• Document current-state processes and inform ERP requirements
• Audit-ready documentation for external audits

Skills

Attention to detail

Vendor management

Cross-functional collaboration

Analytical thinking

Team leadership

Education

Bachelor's degree

Tools

Ramp Pro

ION

QuickBooks

ERP systems

AP automation tools

Job description

• 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

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

Strong understanding of three-way match processes, GL coding, and month-end close procedures5+ years of accounts payable experience, with at least 2 years in a senior or lead AP roleExperience with 1099 reporting, sales/use tax compliance, and audit supportExperience processing high-volume AP (500+ invoices/month) in a fast-paced environmentTrack record of building or improving AP processes and controlsStrong communication skills for vendor management and cross-functional collaborationExcellent attention to detail and ability to manage competing prioritiesProficiency with AP automation tools and ERP systemsExperience in high-growth companies navigating significant scaleSQL or reporting tool proficiency for building AP analyticsHardware, manufacturing, or aerospace/defense industry backgroundFamiliarity with Ramp, QuickBooks, and/or IONMust be willing to work extended hours and weekends as necessary to accomplish our missionExperience with government contract accounting (FAR/DFARS)Experience supporting ERP implementations or system migrations