Controller

Critical Systems is a growing mechanical engineering and HVAC solutions firm supporting complex commercial and mission-critical facilities. As we continue to scale, we are seeking an experienced Controller to lead our accounting function and partner closely with leadership, operations, and sales.

This is a senior, hands-on role ideal for someone who enjoys building strong processes, leading teams, and supporting a project-based organization.

What You’ll Do

• Oversee all accounting operations in compliance with U.S. GAAP


• Manage general ledger, AP, AR, payroll, revenue recognition, and commissions


• Lead the monthly close process, including reconciliations, cost allocations, and financial statement preparation


• Review customer and vendor contracts and ensure proper revenue recognition


• Implement and maintain strong internal controls and accounting policies


• Lead annual audits and manage tax filings and external partners (banking, insurance, auditors)


• Prepare monthly financial reporting packages for leadership and banking partners


• Support annual budgeting, forecasting, and planning


• Build, mentor, and develop a high-performing accounting team


• Partner cross-functionally with engineering, sales, HR, and operations on financial initiatives

What We’re Looking For

• Bachelor’s degree in Accounting or related field (Master’s preferred)


• CPA preferred


• 6+ years of progressive accounting experience, including leadership roles


• Strong understanding of U.S. GAAP and technical accounting


• Experience in project-based, engineering, construction, or professional services environments a plus


• ERP system experience and a track record of improving accounting processes and controls


• Highly organized, detail-oriented, and able to operate independently


• Strong communicator and collaborative business partner

Compensation & Benefits

• Salary range: $110,000 – $135,000


• 401(k) with company match


• Medical, dental, and vision insurance


• Paid time off


• Flexible schedule


• Tuition reimbursement and additional benefits

Location: Primarily in-person with flexibility

If you’re looking to make a real impact in a growing, engineering-driven organization — and want a seat at the table— we’d love to connect.