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 – $175,000 based on experience
• 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.