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Sustainment is an AI-native software platform helping US-based manufacturers connect with critical suppliers to build and manage supply chains. The company serves both DoD and commercial customers, positioning itself as a dual-use technology platform supporting the vision of a hyperconnected, secure, and resilient American manufacturing ecosystem.
We are seeking a highly skilled and hands-on Controller to lead accounting and financial operations. This individual will be a critical member of the finance team, responsible for building scalable processes, ensuring compliance, and providing the financial visibility needed to support rapid growth. The ideal candidate brings startup experience at Series A/B stage, strong technical accounting expertise, and the ability to thrive in a fast-paced, evolving environment.
Key responsibilities include:
- Own the company's accounting operations, including general ledger, month-end close, financial reporting, and compliance
- Establish and maintain scalable accounting policies, systems, and internal controls to support growth
- Lead preparation of GAAP-compliant financial statements, board reporting, and investor deliverables
- Manage external audits and act as the primary contact with auditors
- Partner cross-functionally with leadership to provide insights into financial performance and support strategic decision-making
- Own monthly budget vs. actuals analysis, partnering with budget owners to explain variances and identify key drivers
- Oversee tax, compliance, and regulatory filings in coordination with external partners
- Implement and optimize financial systems and tools to increase efficiency and accuracy
- Mentor and build a high-performing accounting team as the company scales
Requirements:
- CPA required with strong technical accounting background
- Startup finance experience at Series A/B stage (experience building processes from scratch and scaling)
- Public accounting/audit experience (Big 4 or national firm preferred)
- 7+ years of progressive accounting/finance experience, with at least 2+ years in a controller or senior accounting leadership role
- Deep knowledge of U.S. GAAP, internal controls, and financial reporting requirements
- Experience managing audits, tax filings, and compliance for a high-growth company
- Strong systems orientation experience implementing or optimizing financial systems in a startup environment
- Fluency with AI tools, particularly Claude, for budget vs. actuals commentary, ad hoc analysis, and other finance workflows; ability to use AI as a default productivity tool with effective prompting and sound judgment in validating output
- Exceptional attention to detail, organizational skills, and ability to thrive in ambiguity
- Collaborative, hands-on leader who can operate both strategically and tactically
- Must be local to Austin, TX and willing to be in office
