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S3 AeroDefense
S3 AeroDefense

12 S3 Aerodefense Jobs Hiring Near You

S3 AeroDefense

Corporate Controller

Milwaukee, WI · On-site

The Corporate Controller is a newly created, hands-on leadership role that owns the day-to-day transactional accounting operations of S3 AeroDefense and its subsidiaries. As the company scales ...

S3 AeroDefense LLC

Corporate Controller

Milwaukee, WI · Hybrid

The Corporate Controller is a newly created, hands-on leadership role that owns the day-to-day transactional accounting operations of S3 AeroDefense and its subsidiaries. As the company scales ...

S3 AeroDefense

Supply Chain - Buyer

Milwaukee, WI · On-site

$59K - $75K/yr

Job Type Full-time Description Purpose of the Job: The Supply Chain Analyst is responsible for sourcing and procuring components needed to fill customer demand, negotiating fair pricing, and ensuring ...

S3 AeroDefense

Financial Analyst

Milwaukee, WI · On-site

Job Type Full-time Description Purpose of the Job: Support the Finance Department by performing a mix of accounting and financial analysis activities, including revenue recognition for long-term, ...

S3 AeroDefense

Sourcing Specialist

Milwaukee, WI · On-site

Job Type Full-time Description Purpose of the Job: The Sourcing Specialist supports sourcing activities to meet customer and inventory requirements by researching and identifying sources for aviation ...

S3 AeroDefense LLC

Financial Analyst

Milwaukee, WI · On-site

Description Purpose of the Job: Support the Finance Department by performing a mix of accounting and financial analysis activities, including revenue recognition for long-term, percentage-of ...

S3 AeroDefense LLC

Supply Chain - Buyer

Milwaukee, WI · On-site

$59K - $75K/yr

Description Purpose of the Job: The Supply Chain Analyst is responsible for sourcing and procuring components needed to fill customer demand, negotiating fair pricing, and ensuring timely delivery.

S3 AeroDefense LLC

Sourcing Specialist

Milwaukee, WI · On-site

Description Purpose of the Job: The Sourcing Specialist supports sourcing activities to meet customer and inventory requirements by researching and identifying sources for aviation parts. This role ...

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    Infographic showing various job openings at S3 Aerodefense in the United States as of August 2026, with employment types broken down into 100% Full Time. Highlights an 80% Physical, and 20% Hybrid job distribution.

    Corporate Controller

    S3 AeroDefense

    Milwaukee, WI • On-site

    Full-time

    Posted 9 days ago

    Job description

    Job Type
    Full-time
    Description
    Purpose of the Role:
    The Corporate Controller is a newly created, hands-on leadership role that owns the day-to-day transactional accounting operations of S3 AeroDefense and its subsidiaries. As the company scales - organically and through acquisition - the Controller is responsible for running an accurate, timely, well-controlled, and increasingly automated transactional accounting engine, and for leading the accounting integration of acquired businesses.
    This role is deliberately structured to complement a self-contained FP&A function. The Director of Finance and the FP&A team own the monthly close, financial and management reporting, technical accounting (including revenue recognition), budgeting, and forecasting. The Controller owns the transactional foundation those outputs are built on - accounts payable, accounts receivable and collections, payroll accounting, treasury and cash operations, inventory and cost-accounting transactions, the day-to-day integrity of the general ledger, and the internal control environment. Evaluating customers' credit standing and managing limits and risk mitigation frameworks (such as credit insurance, D&B review, etc.). Success means transactional books that are clean, current, and audit-ready - freeing finance leadership to focus on strategy, reporting, and M&A.
    Reports to: Chief Financial Officer
    Location: Milwaukee, WI (in office with hybrid flexibility on certain days as needed)
    Key Responsibilities
    Transactional Accounting Operations
    • Own end-to-end transactional accounting: accounts payable and disbursements; accounts receivable, billing, and collections; payroll accounting; cash and treasury operations; fixed assets; inventory and cost-accounting transactions; and intercompany transactional processing.
    • Deliver clean sub-ledgers on schedule so the FP&A team can complete the monthly close and reporting without rework.
    • Own account reconciliations across cash, AR, AP, inventory, accruals, and intercompany - resolving variances promptly and maintaining a documented, complete reconciliation cycle.
    • Optimize working capital through disciplined management of payables, receivables and DSO, and cash application.

    Internal Controls & Compliance
    • Design, document, and operate a scalable control framework over transactional processes that is audit-ready today and can withstand increasing scrutiny (including SOX-style controls) as the company grows.
    • Serve as a primary audit contact for transactional and balance-sheet areas, supporting a timely, clean external audit.

    M&A Integration
    • Lead the accounting integration of acquired entities: onboarding AP/AR/payroll/GL processes, mapping charts of accounts and systems, standardizing transactional policies, and establishing intercompany and consolidation mechanics.
    • Support financial due diligence and own the transactional-accounting workstream for Day 1 readiness and post-close integration.
    • Build a repeatable accounting-integration playbook that scales across multiple acquisitions and, where needed, multiple ERPs.

    Systems, Process & Automation
    • Own and continuously improve transactional processes in the Pentagon 2000SQL ERP; drive automation of high-volume, manual workflows (e.g., payment disbursement, billing/AR, reconciliations).
    • Partner with IT and the data/AI initiatives to reduce manual effort, improve data integrity, and support scalable, multi-entity reporting.
    • Operate across multiple ERP systems as needed during acquisition-integration periods.

    Team Leadership
    • Lead, develop, and scale the transactional accounting team (Accounting Manager and AP, AR/credit, payroll, and staff-accounting personnel); build depth, cross-training, and succession for key roles.
    • Convert institutional knowledge into documented SOPs that reduce single points of failure and accelerate onboarding.
    • Foster a positive, accountable, high-integrity culture across the accounting operation.

    Partnership with Finance Leadership
    • Partner closely with the Director of Finance / FP&A so transactional outputs feed the close, reporting, and forecasting cleanly and on time.
    • Support the CFO on controls, cash, working capital, and integration, contributing to lender and sponsor reporting as it relates to transactional and balance-sheet data.

    Requirements
    Required
    • Bachelor's degree in Accounting, Finance, or a related field.
    • 10+ years of progressive accounting experience, including time as a Controller (or equivalent) leading transactional accounting operations (AP, AR, payroll, GL) at a growing company.
    • Demonstrated ownership of a scalable internal control environment and coordination of external audits.
    • Strong ERP and systems orientation, with a track record of process improvement and automation.
    • Proven people-leadership experience managing an accounting team across functions and, ideally, multiple locations.
    • Excellent communication skills, with the ability to translate accounting matters for finance and non-finance stakeholders.

    Preferred
    • CPA (active) and/or a Master's in Accounting or MBA.
    • Experience in a private equity-owned business supporting an acquisition-driven growth strategy, including accounting integration of acquired entities.
    • Experience at a company with an international footprint (multi-entity, cross-border operations).
    • Manufacturing or industrial exposure with inventory-intensive operations (aerospace/defense or distribution a plus); familiarity with government/defense contracting considerations helpful.
    • Experience operating across multiple ERPs during integrations; Pentagon 2000SQL experience a plus.

    First 6 Months- Indicators of Success
    • Transactional sub-ledgers reconciled and closed on a predictable schedule, with a documented reconciliation cycle and no material audit adjustments.
    • A documented, scalable control framework in place over AP, AR, payroll, and cash.
    • Measurable automation of at least one high-volume manual process (e.g., payment disbursement or billing/AR).
    • A repeatable accounting-integration playbook ready for the first acquisition.
    • A cross-trained transactional team with documented SOPs and reduced key-person risk.

    Reporting Relationships
    • Reports to: Chief Financial Officer.
    • Direct reports: Accounting Manager and the transactional accounting team (AP, AR / credit, payroll, staff accounting).
    • Key partner: Director of Finance (FP&A Lead) - owns the close, financial and management reporting, technical accounting, and planning.

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