Assistant Controller

About the Role

We’re looking for a sharp, hands-on Assistant Controller to join our fast-growing Accounting team. Reporting to the Corporate Controller, you'll play a critical role in scaling our controllership function while ensuring accuracy, compliance, and operational excellence across the board. You’ll help lead month-end close, strengthen internal controls, support audits, and collaborate closely with cross-functional teams to drive insight and accountability across the business.

This is a great opportunity for someone who thrives in a high-growth environment and wants to help build a world-class accounting org from the inside out. Also, we believe employees are better together. Every position at Flow has an onsite or in-office requirement.

What You’ll Do

• Lead the month-end close process, including preparation of account reconciliations, journal entries, and internal management reports
• Partner with the Corporate Controller to develop and maintain accounting policies, procedures, and documentation that scale with the business
• Draft GAAP-compliant technical accounting memos that clearly communicate complex concepts and their operational impact
• Support reporting integrity by working with FP&A to ensure records align with key business dimensions (e.g., departments, vendors, business units)
• Manage and maintain financial system dimensions and reporting structures in our ERP (Sage Intacct experience is a plus)
• Help enhance and implement internal controls for both existing and evolving processes
• Support external audits by organizing requests, managing timelines, and offering clear documentation and commentary
• Pitch in on team development, cross-functional initiatives, and special projects as needed

What You Bring

• Bachelor's degree in Accounting, with 8-10 years of relevant experience (a mix of public accounting and in-house experience preferred)
• Solid foundation in US GAAP (IFRS experience a plus) and experience preparing or reviewing financial statements
• Strong leadership and interpersonal skills-you know how to collaborate, influence, and bring clarity to complex topics
• Excellent attention to detail, organizational skills, and communication (both written and verbal)
• Experience working across multiple legal entities and ownership structures
• Advanced Excel skills, with bonus points for Python and SQL exposure
• CPA strongly preferred, but not required
• Experience with a modern ERP system-Sage Intacct or similar preferred

Why You’ll Love Working Here

• You’ll join a team that values precision, pragmatism, and partnership. We take pride in getting the details right, moving fast without cutting corners, and building systems that last. You’ll have a voice, real ownership, and a chance to shape how accounting supports our continued growth.