Bank Controller

About Mercury: Mercury is a financial technology company building banking products for ambitious businesses. We've grown from a startup banking* platform to a company that manages tens of billions in deposits — and now we're taking the next step: pursuing a de novo bank charter to become a full-fledged bank. This is a rare and defining moment. As we transition from fintech to bank, we need to build institutional-grade accounting infrastructure from the ground up. That work starts here. *Mercury is a fintech company, not an FDIC-insured bank. Banking services provided through Choice Financial Group and Column N.A., Members FDIC. The role: Reporting directly to the Corporate Controller, the Bank Controller will own the accounting function for Mercury's banking entity. This is a foundational leadership role — you will build the policies, processes, systems, and team that enable Mercury to operate as a fully regulated insured depository institution. You'll work at the intersection of technical accounting, regulatory compliance, and operational build-out. This isn't a role for someone who wants to maintain an existing function — it's for someone who wants to architect one and work closely with Engineering and Product. What you'll do: Bank accounting infrastructure Design and implement the Chart of Accounts, general ledger structure, and subledger architecture for the bank entity in accordance with call report and regulatory reporting requirements Establish bank-specific accounting policies covering investment securities (ASC 320/326), loan accounting, interest income accruals, ALLL/ACL methodology, and fee recognition Build out the bank's financial close process and reconciliation framework Regulatory and call report compliance Lead preparation of FFIEC Call Reports (FFIEC 031/041), FR Y-9C, and other regulatory financial submissions on a quarterly basis Serve as the primary accounting subject matter expert in regulatory examinations (OCC, FDIC, Federal Reserve), responding to examiner requests and managing remediation items Implement and maintain the bank's accounting policy manual in compliance with GAAP, regulatory guidance, and safety and soundness standards Partner with Treasury on ALM reporting, liquidity coverage ratios, and interest rate risk disclosures Financial reporting and controls Review the bank entity's standalone GAAP financial statements, including the balance sheet, income statement, and notes Design and operationalize the bank's SOX/SOC controls environment in partnership with internal audit and the holding company controller function Lead the bank's relationship with external auditors, coordinating the annual audit and interim reviews for the bank entity Establish and maintain robust reconciliation controls covering deposits, loans, investments, intercompany balances, and suspense accounts Team and systems build-out Partner with Finance Systems and Engineering to implement or configure the bank's core accounting system, ensuring it supports regulatory reporting and audit requirements Define data flows between the bank's core banking system, the Double Entry Ledger, and Mercury's consolidated reporting infrastructure Collaborate cross-functionally with Legal, Compliance, Risk, Treasury, and Product to ensure the bank's accounting architecture supports new product launches and regulatory timelines What we're looking for: Required experience 10+ years of progressive accounting experience with meaningful time in banking Deep familiarity with bank regulatory accounting, including Call Report preparation and GAAP as applied to insured depository institutions Strong technical accounting skills across investment securities (ASC 320/326), credit losses (CECL/ASC 326), interest income, and intercompany accounting CPA required Strongly preferred Prior exposure to OCC, FDIC, or Federal Reserve examinations in an accounting or controllership capacity Hands-on experience building or materi ... (truncated, view full listing at source)