Accounts Payable Manager

The role

The AP Manager will own end-to-end accounts payable operations and manage the full invoice-to-payment cycle. This role involves processing high volumes of invoices and building scalable AP infrastructure, controls, and documentation.

What you will do

• Process 800-1,300+ invoices monthly across QuickBooks, ION, and Ramp
• Review, code, and approve invoices for GL account, project codes, and class accounting
• Perform manual three-way matching across disconnected systems
• 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
• Coordinate with Procurement on vendor onboarding, contracts, and payment terms
• Build scalable AP infrastructure and design/document AP policies, procedures, and workflows
• Lead AP workstream for ERP selection, implementation, and data migration

Required qualifications

• 5+ years of accounts payable experience
• At least 2 years in a senior or lead AP role
• Experience processing high-volume AP (500+ invoices/month) in a fast-paced environment
• Proficiency with AP automation tools and ERP systems
• Strong understanding of three-way match processes, GL coding, and month-end close procedures
• Experience with 1099 reporting, sales/use tax compliance, and audit support
• Track record of building or improving AP processes and controls
• Excellent attention to detail and ability to manage competing priorities
• Strong communication skills for vendor management and cross-functional collaboration

Nice to have

• Hardware, manufacturing, or aerospace/defense industry background
• Experience with government contract accounting (FAR/DFARS)
• Familiarity with Ramp, QuickBooks, and/or ION
• Experience supporting ERP implementations or system migrations
• SQL or reporting tool proficiency for building AP analytics
• Experience in high-growth companies navigating significant scale

Benefits

• Substantial incentive stock plan for all full-time employees
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
• One Medical: Sponsored memberships for employees and their dependents
• Vision: 100% top tier plan coverage + 50% for dependents
• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents
• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA offered as employee contributed benefits
• 8-weeks of paid parental leave for all parents
• Additional paid pregnancy leave for CA employees
• Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University for eligible employees
• Daily catered lunch
• Free snacks and drinks
• Flexible PTO policy

Before you apply

• Must be willing to work extended hours and weekends as necessary
• Must work 100% onsite at El Segundo HQ
• Job offer contingent upon capacity to serve in compliance with U.S. export controls

About the company

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force.