Sentinel Capital Partners, a middle-market focused private equity firm, has acquired SPL, a provider of testing, inspection, and certification services for environmental firms. Financial terms of the deal were not disclosed.

SPL has 22 lab testing and service centers and employs over 250 technicians who install and maintain field measurement services for customers. SPL has a global client base, with customers in North American, EMEA, and APAC markets. The firm helps clients with transactional obligations in addition to assisting clients in maintaining environmental, social, and governance (ESG) standards.

SPL’s CEO Jeff Hibbeler said, “Our industry has entered a secular upswing, and we believe Sentinel’s proven expertise in helping companies like ours accelerate growth organically and via acquisitions will enable SPL to outperform.”