AP​/AR Specialist

Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge.

For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles.

Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more.

We’d love for you to join us on our mission of providing humankind access to the galaxy beyond our planet.

We are seeking a detail-oriented and self-motivated individual to join our Accounting team as our first AP/AR Specialist. You will play a critical role in supporting our month-end close, financial reporting, and optimize our accounting operations. This position requires hands-on management of day-to-day transactions within AP, AR, and integrated systems to ensure efficiency and accuracy of our financial records. The ideal candidate will leverage tools like Ramp, ERP systems, and Excel to build reports and supporting schedules, develop ad-hoc reports for distribution across teams, and support budgeting and forecasting cycles.

This is a unique opportunity to build scalable financial operations that directly impact procurement, revenue, and company growth.

Accounts Payable:

· Upload and categorize vendor bills in Ramp; matching POs and invoices within inventory and procurement systems

· Review credit card transactions for proper documentation and categories

· Manage vendor setup, W-9 collection, and payment term tracking

· Monitor aging reports and flag discrepancies or duplicate charges

· Help manage custom payment schedules for inventory with large orders (+$1M)

Accounts Receivable:

· Draft customer invoices based on contract terms and milestones

· Submit invoices through customer portals or via email as needed

· Track open receivables and follow up with internal teams or customer AP contacts

· Maintain and update collections status, cash receipts, and outstanding balances

· Support customer onboarding by tracking PO#s, billing requirements, and contacts

Must-Have:

· 1–3 years of experience in AP, AR, or general accounting support

· Proficiency with modern accounting tools (e.g., Ramp, Quick Books, , G-Suite/Excel)

· Excellent attention to detail and a knack for documentation and follow-up

· Strong communication and coordination skills (especially with vendors and customers)

· Curiosity and desire to learn new skills, software, and strive for continual improvement

Nice-to-Have:

· Systems and process first mentality

· Experience with manufacturing, hardware, or inventory-heavy operations

· Familiarity with ERP systems or tools like Net Suite, Palantir, or similar

· Exposure to government/defense billing requirements (ITAR, progress billing, etc.)

· Firsthand experience helping scale a modern, tech-enabled finance function

· Exposure to custom ERP implementation and cross-functional operations

· Opportunity to grow into broader accounting or operations roles as we scale

· Work in a mission-driven, collaborative culture focused on precision and execution

#LI-JC1

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 backed by $200M in Series D funding, and we invest heavily in our people from day one.

• 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,…