Assistant Controller at Technical Safety Services – San Diego, California

Who are we?

The TSS Family of Companies is one of the largest independent laboratory and hospital service providers with locations across the United States. Our customers include leading life sciences and healthcare companies and renowned research institutions. We are a leading provider of environmental monitoring solutions and testing, calibration, and certification services for controlled environments, medical gas systems, and laboratory instrumentation. Our Family of Companies includes Technical Safety Services (TSS), Evergreen Medical Services (EMS), and Cornerstone Commissioning.

We are rapidly growing and looking for additional passionate and talented employees to join our team and partner with our customers who are doing dramatic work focused on improving the human condition

How will you make an impact?

We are seeking a hands-on, detail-oriented Assistant Controller to support consolidated financial reporting across multiple U.S. and international entities. This role is deeply involved in operational accounting, ownership of the month-end, quarter-end, and year-end close, and ensuring the accuracy, integrity, and timeliness of financial reporting in a growing, acquisitive environment.

The Assistant Controller will oversee general ledger activities, balance sheet integrity, reconciliations, and close processes while partnering with leadership on process improvements, close efficiency, and accounting policy development. This role also supports technical accounting, M&A integration, audit readiness, and scalable controls as the organization continues to grow.

This position manages a team of 5–8 accounting professionals and requires strong U.S. GAAP knowledge, experience operating in a multi-entity environment, and comfort working within Microsoft Dynamics 365. The ideal candidate is proactive, operationally strong, technically capable, and thrives in a fast-paced setting where structure and efficiency matter.

What will you do?

• Lead the financial integration of newly acquired businesses, ensuring alignment of accounting policies, reporting structures, and internal controls
• Oversee treasury-related functions including accounts payable governance, cash management, bank controls, and payment authorization frameworks
• Design, implement, and govern enterprise-wide accounting policies and procedures to support rapid growth, acquisitions, and increasing audit expectations in a PE-backed environment
• Own and oversee the monthly, quarterly, and annual close process across multiple domestic and international entities, ensuring timely, accurate, and complete financial reporting
• Lead close and reporting transformation initiatives to reduce cycle times, increase automation, and establish SOX-ready discipline without introducing unnecessary bureaucracy
• Provide executive-level oversight of operational accounting, including general ledger integrity, journal entry approval, account reconciliations, and balance sheet accuracy
• Review subsidiary trial balances and ensure accurate consolidated financial statements in accordance with U.S. GAAP
• Oversee intercompany accounting, eliminations, and reconciliations across a multi-entity structure
• Apply and oversee technical accounting matters, including ASC 606 (Revenue), ASC 842 (Leases), ASC 805 (Business Combinations), and inventory accounting, as applicable
• Partner with executive leadership and M&A stakeholders to align accounting policies and procedural standards with integration strategy, scalability requirements, and future exit readiness
• Lead the financial integration of newly acquired businesses, ensuring alignment of accounting policies, reporting structures, and internal controls
• Strengthen internal control frameworks and implement SOX-like discipline to support scale, audit readiness, and transaction preparedness
• Drive continuous improvement across accounting systems, workflows, and reporting processes, leveraging Microsoft Dynamics 365 and related tool
• Provide leadership, mentorship, and performance oversight to a team of 5–8 accounting professionals, building a high-accountability, high-performance culture
• Partner cross-functionally on finance and accounting initiatives as the organization continues to evolve

How will you get rewarded?

Compensation and Benefits

• Salary range of $154,000 - $206,000 annually
  (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, and alignment with industry data.)
• Eligible to participate in the annual bonus and equity long-term incentive programs
• Medical, vision, and dental insurance
• 401(k) plan with a company matching contribution
• Long-term disability, short-term disability, and life insurance
• Competitive Paid Time Off (PTO) and company paid holidays

How will you get here?

Education and Experience

• Bachelor’s degree in accounting or finance.
• CPA is required
• 10+ years of progressive accounting experience, including team management
• A combination of education, experience and training may meet requirements.

Knowledge, Skills, and Abilities

• Strong working knowledge and experience with Generally Accepted Accounting Principles (GAAP) and multi-entity consolidations
• Prior experience with Microsoft Dynamics 365 or similar ERP systems
• Experience in acquisitive, high-growth environments preferred
• Proven ability to manage audit, treasury, and compliance responsibilities
• Strong Excel skills and comfort with system-based reporting and automation
• Excellent communication, leadership, and project management abilities
  

TSS is a passionate equal opportunity employer and celebrates diversity. Interested in a role but not sure it’s the right fit for you? Call us and let’s talk.