Supervisor, Accounts Payable & Accounts Receivable

Key Responsibilities
· Oversee full-cycle AP and AR operations including billing, collections, and vendor/customer communication

· Manage vendor onboarding, payment terms, W-9 documentation, and customer invoicing workflows

· Partner cross-functionally with Supply Chain, Mission Services, and Finance to resolve billing, PO, and payment discrepancies

· Monitor AP aging, AR aging, cash disbursements, and collections activity to ensure timely processing and strong cash flow management

· Support month-end close activities including reconciliations, accruals, account analysis,

· Help strengthen internal controls, documentation, and segregation of duties across accounting operations for annual audit support

· Identify and implement process improvements, automation opportunities, and scalable workflows to support company growth and increased transaction volume

· Help train and support future AP/AR Analysts while contributing to a high-accountability, process-oriented accounting culture

What You Bring
Must-Have:

· 5+ years of AP and/or AR experience

· Experience overseeing full-cycle AP and AR workflows in a high-volume environment

· Experience working within manufacturing, aerospace, hardware, or inventory-driven environments preferred

· Strong process improvement mindset with experience helping scale accounting operations

· Experience with modern accounting and finance tools such as Ramp, Campfire, NetSuite, QuickBooks, or similar systems

· Highly organized with strong attention to detail and follow-through

Nice-to-Have:

· Start-up experience or experience in high growth environments

· Experience in aerospace, hardware, or manufacturing environments

· Prior exposure to audit support or pre-IPO environments

What You’ll Gain
· A key role in defining the future of our AP and AR function

· Direct involvement in system transformation (introducing new AP/ AR workflows within custom built ERP system

· A mission-driven culture that values precision, speed, and cross-functional ownership

· Opportunity to join a high growth company positioned to capture significant market share

Why Join Apex?
Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup that has raised more than $500M in funding, and we invest heavily in our people from day one.

What We Offer For Full-time Employees:
Shared upside: Receive equity in Apex, letting you benefit from the work you create

Best-in-class healthcare: 100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost

Comprehensive PTO package to reset and recharge - starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays

Competitive 401(k) plan with generous matching - 100% match on first 3%, 50% on next 2%

8 weeks paid parental leave plus childcare reimbursement up to $350/day for work-related travel

Daily catered lunch and unlimited snacks to keep you fueled throughout the day

Vibrant community: Monthly office socials, pickleball tournaments, run club, and gatherings for you and your family

Your dream desk setup and all the tools you need to be your most productive self

World-class Playa Vista office with the benefit of in-person collaboration with amazing coworkers and flexibility to integrate work and life

Real impact opportunity: Work alongside experts from aerospace, new space, and other cutting-edge industries to make a lasting difference