Job Description
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.