Services provided by Shiel laboratories in Rockleigh and in Brooklyn will transition to Quest's flagship clinical laboratory in Teterboro, Quest said in the statement. The acquisition is designed to help Quest grow its business in the New York-New Jersey area, according to the release, which did not mention the Rockleigh layoffs. "By joining forces with Shiel, physicians and patients in the New York-New Jersey region will have broader access to Quest's diagnostic insights and innovations," Quest CEO Steve Rusckowski said in a statement. "The acquisition will also deliver on Quest's strategy to accelerate growth and drive operational excellence through strategically aligned, accretive acquisitions." Quest claims it serves one in three adult Americans and half the doctors and hospitals in the United States each year. The company employees about 43,000. Founded in 1919, Shiel is one of the oldest operating clinical laboratories in the United States and the largest privately held laboratory in New York.